STScI Scientist Julien H Girard

All Stories

1. 
   Direct Images of CO 2 Absorption in the Atmosphere of a Super-Jupiter: Enhanced Metallicity Suggestive of Formation in a Disk

   Article • The Astrophysical Journal Letters, April 2026, American Astronomical Society

   STScI Scientist Julien H Girard

2. 
   JWST interferometric imaging reveals the dusty torus obscuring the supermassive black hole of Circinus galaxy

   Article • Nature Communications, January 2026, Springer Science + Business Media

   STScI Scientist Julien H Girard

3. 
   Exomoon search with VLTI/GRAVITY around the substellar companion HD 206893 B

   Article • EAS Publications Series, January 2026, EDP Sciences

   STScI Scientist Julien H Girard

4. 
   CoronaGraph Instrument Reference Stars for Exoplanets (CorGI-REx). I. Preliminary Vetting and Implications for the Roman Coronagraph and Habitable Worlds Observatory

   Article • The Astronomical Journal, December 2025, American Astronomical Society

   STScI Scientist Julien H Girard

5. 
   Discovery of a Debris Disk around TWA 20

   Article • The Astrophysical Journal, December 2025, American Astronomical Society

   STScI Scientist Julien H Girard

6. 
   Characterization of debris disks observed with SPHERE

   Article • EAS Publications Series, December 2025, EDP Sciences

   STScI Scientist Julien H Girard

7. 
   The mid-infrared spectrum of β Pictoris b

   Article • EAS Publications Series, December 2025, EDP Sciences

   STScI Scientist Julien H Girard

8. 
   JWST-TST High Contrast: Medium-resolution spectroscopy reveals a carbon-rich circumplanetary disk around the young accreting exoplanet Delorme 1 AB b

   Article • EAS Publications Series, December 2025, EDP Sciences

   STScI Scientist Julien H Girard

9. 
   Resolving the unresolved: Discovery and dynamical masses of the brown dwarf binary DE1756−45

   Article • EAS Publications Series, December 2025, EDP Sciences

   STScI Scientist Julien H Girard

10. 
    The ExoGRAVITY survey: A K -band spectral library of giant exoplanet and brown dwarf companions

    Article • EAS Publications Series, December 2025, EDP Sciences

    STScI Scientist Julien H Girard

11. 
    The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems. VI. Evidence for Radially Evolving Icy Grains in the HD 141569A Disk via NIRCam Coronagraphic Imaging

    Article • The Astrophysical Journal, November 2025, American Astronomical Society

    STScI Scientist Julien H Girard

12. 
    Direct Measurement of Extinction in a Planet-hosting Gap

    Article • The Astronomical Journal, November 2025, American Astronomical Society

    STScI Scientist Julien H Girard

13. 
    Constraints on the Orbit of the Young Substellar Companion GQ Lup B from High-resolution Spectroscopy and VLTI/GRAVITY Astrometry *

    Article • The Astrophysical Journal, October 2025, American Astronomical Society

    STScI Scientist Julien H Girard

14. 
    Probing the Outskirts of M Dwarf Planetary Systems with a Cycle 1 JWST NIRCam Coronagraphy Survey

    Article • The Astronomical Journal, September 2025, American Astronomical Society

    STScI Scientist Julien H Girard

15. 
    Direct imaging discovery of a young giant planet orbiting on Solar System scales

    Article • EAS Publications Series, July 2025, EDP Sciences

    STScI Scientist Julien H Girard

16. 
    Orbit and atmosphere of HIP 99770 b through the eyes of VLTI/GRAVITY

    Article • EAS Publications Series, July 2025, EDP Sciences

    STScI Scientist Julien H Girard

17. 
    JWST Coronagraphic Images of 14 Her c: A Cold Giant Planet in a Dynamically Hot Multiplanet System

    Article • The Astrophysical Journal Letters, July 2025, American Astronomical Society

    STScI Scientist Julien H Girard

18. 
    Follow-up Exploration of the TWA 7 Planet–Disk System with JWST NIRCam

    Article • The Astrophysical Journal Letters, July 2025, American Astronomical Society

    STScI Scientist Julien H Girard

19. 
    Silicate clouds and a circumplanetary disk in the YSES-1 exoplanet system

    Article • Nature, June 2025, Springer Science + Business Media

    STScI Scientist Julien H Girard

20. 
    The SPHERE infrared survey for exoplanets (SHINE)

    Article • EAS Publications Series, May 2025, EDP Sciences

    STScI Scientist Julien H Girard

21. 
    The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems. III. Aperture Masking Interferometric Observations of the Star HIP 65426 at 3.8 μm

    Article • The Astrophysical Journal Letters, April 2025, American Astronomical Society

    STScI Scientist Julien H Girard

22. 
    JWST-TST High Contrast: Living on the Wedge, or, NIRCam Bar Coronagraphy Reveals CO2 in the HR 8799 and 51 Eri Exoplanets’ Atmospheres

    Article • The Astronomical Journal, March 2025, American Astronomical Society

    STScI Scientist Julien H Girard

23. 
    Direct imaging and dynamical mass of a benchmark T-type brown dwarf companion to HD 167665

    Article • EAS Publications Series, November 2024, EDP Sciences

    STScI Scientist Julien H Girard

24. 
    JWST-TST High Contrast: Spectroscopic Characterization of the Benchmark Brown Dwarf HD 19467 B with the NIRSpec Integral Field Spectrograph

    Article • The Astronomical Journal, October 2024, American Astronomical Society

    STScI Scientist Julien H Girard

25. 
    MIRI MRS Observations of Beta Pictoris. II. The Spectroscopic Case for a Recent Giant Collision

    Article • The Astrophysical Journal, September 2024, American Astronomical Society

    STScI Scientist Julien H Girard

26. 
    The Nancy Grace Roman Space Telescope coronagraph community participation program

    Article • August 2024, SPIE

    STScI Scientist Julien H Girard

27. 
    The Roman coronagraph community participation program: data reduction pipeline and simulations

    Article • August 2024, SPIE

    STScI Scientist Julien H Girard

28. 
    The Roman coronagraph community participation program: observation planning

    Article • August 2024, SPIE

    STScI Scientist Julien H Girard

29. 
    Combining Gaia and GRAVITY: Characterising five new directly detected substellar companions

    Article • EAS Publications Series, August 2024, EDP Sciences

    STScI Scientist Julien H Girard

30. 
    JWST-TST High Contrast: Achieving Direct Spectroscopy of Faint Substellar Companions Next to Bright Stars with the NIRSpec Integral Field Unit

    Article • The Astronomical Journal, July 2024, American Astronomical Society

    STScI Scientist Julien H Girard

31. 
    JWST-TST High Contrast: JWST/NIRCam Observations of the Young Giant Planet β Pic b

    Article • The Astronomical Journal, July 2024, American Astronomical Society

    STScI Scientist Julien H Girard

32. 
    Catalogue of dual-field interferometric binary calibrators

    Article • EAS Publications Series, July 2024, EDP Sciences

    STScI Scientist Julien H Girard

33. 
    Four-of-a-kind? Comprehensive atmospheric characterisation of the HR 8799 planets with VLTI/GRAVITY

    Article • EAS Publications Series, July 2024, EDP Sciences

    STScI Scientist Julien H Girard

34. 
    SPHERE RefPlanets: Search for ε Eridani b and warm dust

    Article • EAS Publications Series, July 2024, EDP Sciences

    STScI Scientist Julien H Girard

35. 
    High contrast at short separation with VLTI/GRAVITY: Bringing Gaia companions to light

    Article • EAS Publications Series, June 2024, EDP Sciences

    STScI Scientist Julien H Girard

36. 
    JWST/NIRCam Detection of the Fomalhaut C Debris Disk in Scattered Light

    Article • The Astrophysical Journal Letters, May 2024, American Astronomical Society

    STScI Scientist Julien H Girard

37. 
    The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems. V. Do Self-consistent Atmospheric Models Represent JWST Spectra? A Showcase with VHS 1256–1257 b

    Article • The Astrophysical Journal Letters, April 2024, American Astronomical Society

    STScI Scientist Julien H Girard

38. 
    MIRI MRS Observations of β Pictoris. I. The Inner Dust, the Planet, and the Gas

    Article • The Astrophysical Journal, March 2024, American Astronomical Society

    STScI Scientist Julien H Girard

39. 
    The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems. IV. NIRISS Aperture Masking Interferometry Performance and Lessons Learned

    Article • The Astrophysical Journal Letters, February 2024, American Astronomical Society

    STScI Scientist Julien H Girard

40. 
    JWST-TST High Contrast: Asymmetries, Dust Populations, and Hints of a Collision in the β Pictoris Disk with NIRCam and MIRI

    Article • The Astronomical Journal, January 2024, American Astronomical Society

    STScI Scientist Julien H Girard

41. 
    VLTI/GRAVITY Provides Evidence the Young, Substellar Companion HD 136164 Ab Formed Like a “Failed Star”

    Article • The Astronomical Journal, January 2024, American Astronomical Society

    STScI Scientist Julien H Girard

42. 
    First VLTI/GRAVITY Observations of HIP 65426 b: Evidence for a Low or Moderate Orbital Eccentricity

    Article • The Astronomical Journal, November 2023, American Astronomical Society

    STScI Scientist Julien H Girard

43. 
    Large Interferometer For Exoplanets (LIFE)

    Article • EAS Publications Series, October 2023, EDP Sciences

    STScI Scientist Julien H Girard

44. 
    VLTI/GRAVITY Observations and Characterization of the Brown Dwarf Companion HD 72946 B

    Article • The Astrophysical Journal, October 2023, American Astronomical Society

    STScI Scientist Julien H Girard

45. 
    TOI-179: A young system with a transiting compact Neptune-mass planet and a low-mass companion in outer orbit

    Article • EAS Publications Series, July 2023, EDP Sciences

    STScI Scientist Julien H Girard

46. 
    The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems I: High-contrast Imaging of the Exoplanet HIP 65426 b from 2 to 16 μm

    Article • The Astrophysical Journal Letters, July 2023, American Astronomical Society

    STScI Scientist Julien H Girard

47. 
    The James Webb Space Telescope Mission

    Article • Publications of the Astronomical Society of the Pacific, June 2023, Institute of Physics Publishing

    STScI Scientist Julien H Girard

48. 
    The Science Performance of JWST as Characterized in Commissioning

    Article • Publications of the Astronomical Society of the Pacific, April 2023, Institute of Physics Publishing

    STScI Scientist Julien H Girard

49. 
    Time-resolved Optical Polarization Monitoring of the Most Variable Brown Dwarf

    Article • The Astronomical Journal, March 2023, American Astronomical Society

    STScI Scientist Julien H Girard

50. 
    The high-albedo, low polarization disk around HD 114082 that harbors a Jupiter-sized transiting planet

    Article • EAS Publications Series, March 2023, EDP Sciences

    STScI Scientist Julien H Girard

51. 
    Direct discovery of the inner exoplanet in the HD 206893 system

    Article • EAS Publications Series, March 2023, EDP Sciences

    STScI Scientist Julien H Girard

52. 
    The JWST Early-release Science Program for Direct Observations of Exoplanetary Systems II: A 1 to 20 μm Spectrum of the Planetary-mass Companion VHS 1256–1257 b

    Article • The Astrophysical Journal Letters, March 2023, American Astronomical Society

    STScI Scientist Julien H Girard

53. 
    Performance of NIRCam on JWST in Flight

    Article • Publications of the Astronomical Society of the Pacific, February 2023, Institute of Physics Publishing

    STScI Scientist Julien H Girard

54. 
    The SPHERE view of three interacting twin disc systems in polarized light

    Article • Monthly Notices of the Royal Astronomical Society, November 2022, Oxford University Press (OUP)

    STScI Scientist Julien H Girard

55. 
    JWST/MIRI coronagraphic performances as measured on-sky

    Article • EAS Publications Series, November 2022, EDP Sciences

    STScI Scientist Julien H Girard

56. 
    Orbital and dynamical analysis of the system around HR 8799

    Article • EAS Publications Series, October 2022, EDP Sciences

    STScI Scientist Julien H Girard

57. 
    Reference-star differential imaging on SPHERE/IRDIS

    Article • EAS Publications Series, October 2022, EDP Sciences

    STScI Scientist Julien H Girard

58. 
    Constraining masses and separations of unseen companions to five accelerating nearby stars

    Article • EAS Publications Series, September 2022, EDP Sciences

    STScI Scientist Julien H Girard

59. 
    Probing the innermost region of the AU Microscopii debris disc

    Article • EAS Publications Series, September 2022, EDP Sciences

    STScI Scientist Julien H Girard

60. 
    The JWST Early Release Science Program for the Direct Imaging and Spectroscopy of Exoplanetary Systems

    Article • Publications of the Astronomical Society of the Pacific, September 2022, Institute of Physics Publishing

    STScI Scientist Julien H Girard

61. 
    First Peek with JWST/NIRCam Wide-field Slitless Spectroscopy: Serendipitous Discovery of a Strong [O iii]/Hα Emitter at z = 6.11

    Article • The Astrophysical Journal Letters, August 2022, American Astronomical Society

    STScI Scientist Julien H Girard

62. 
    Direct imaging and spectroscopy of exoplanetary systems with the JWST early release science program

    Article • August 2022, SPIE

    STScI Scientist Julien H Girard

63. 
    JWST/NIRCam coronagraphy: commissioning and first on-sky results

    Article • August 2022, SPIE

    STScI Scientist Julien H Girard

64. 
    Nancy Grace Roman Space Telescope coronagraph instrument observation calibration plan

    Article • August 2022, SPIE

    STScI Scientist Julien H Girard

65. 
    Performance of near-infrared high-contrast imaging methods with JWST from commissioning

    Article • August 2022, SPIE

    STScI Scientist Julien H Girard

66. 
    Large Interferometer For Exoplanets (LIFE)

    Article • EAS Publications Series, August 2022, EDP Sciences

    STScI Scientist Julien H Girard, Tim Lichtenberg

67. 
    ISPY – NaCo Imaging Survey for Planets around Young stars

    Article • EAS Publications Series, July 2022, EDP Sciences

    STScI Scientist Julien H Girard

68. 
    New binaries from the SHINE survey

    Article • EAS Publications Series, July 2022, EDP Sciences

    STScI Scientist Julien H Girard

69. 
    Trends in Silicates in the β Pictoris Disk

    Article • The Astrophysical Journal, July 2022, American Astronomical Society

    STScI Scientist Julien H Girard

70. 
    Calibration of quasi-static aberrations in exoplanet direct-imaging instruments with a Zernike phase-mask sensor

    Article • EAS Publications Series, April 2022, EDP Sciences

    STScI Scientist Julien H Girard

71. 
    Characterizing the Protolunar Disk of the Accreting Companion GQ Lupi B*

    Article • The Astronomical Journal, December 2021, American Astronomical Society

    STScI Scientist Julien H Girard

72. 
    The mass ofβPictoris c fromβPictoris b orbital motion

    Article • EAS Publications Series, October 2021, EDP Sciences

    STScI Scientist Julien H Girard

73. 
    Simulating JWST high contrast observations with PanCAKE

    Article • September 2021, SPIE

    STScI Scientist Julien H Girard

74. 
    Lessons learned from SPHERE for the astrometric strategy of the next generation of exoplanet imaging instruments

    Article • Journal of Astronomical Telescopes Instruments and Systems, August 2021, SPIE

    STScI Scientist Julien H Girard

75. 
    GRAVITY K-band spectroscopy of HD 206893 B

    Article • EAS Publications Series, August 2021, EDP Sciences

    STScI Scientist Julien H Girard

76. 
    Constraints on the nearby exoplanet ϵ Indi Ab from deep near- and mid-infrared imaging limits

    Article • EAS Publications Series, July 2021, EDP Sciences

    STScI Scientist Julien H Girard, Fabo Feng

77. 
    The SPHERE infrared survey for exoplanets (SHINE)

    Article • EAS Publications Series, July 2021, EDP Sciences

    STScI Scientist Julien H Girard

78. 
    The SPHERE infrared survey for exoplanets (SHINE)

    Article • EAS Publications Series, July 2021, EDP Sciences

    STScI Scientist Julien H Girard

79. 
    Direct Imaging of Exoplanets beyond the Radial Velocity Limit: Application to the HD 134987 System

    Article • The Astronomical Journal, June 2021, American Astronomical Society

    STScI Scientist Julien H Girard

80. 
    A MUSE view of the asymmetric jet from HD 163296

    Article • EAS Publications Series, June 2021, EDP Sciences

    STScI Scientist Julien H Girard

81. 
    Community exoplanet imaging data challenge for Roman CGI and starshade rendezvous

    Article • Journal of Astronomical Telescopes Instruments and Systems, May 2021, SPIE

    STScI Scientist Julien H Girard

82. 
    Possible single-armed spiral in the protoplanetary disk around HD 34282

    Article • EAS Publications Series, May 2021, EDP Sciences

    STScI Scientist Julien H Girard

83. 
    A search for a fifth planet around HR 8799 using the star-hopping RDI technique at VLT/SPHERE

    Article • EAS Publications Series, April 2021, EDP Sciences

    STScI Scientist Julien H Girard

84. 
    A survey of the linear polarization of directly imaged exoplanets and brown dwarf companions with SPHERE-IRDIS

    Article • EAS Publications Series, March 2021, EDP Sciences

    STScI Scientist Julien H Girard

85. 
    Constraining the Nature of the PDS 70 Protoplanets with VLTI/GRAVITY ∗

    Article • The Astronomical Journal, February 2021, American Astronomical Society

    STScI Scientist Julien H Girard

86. 
    A faint companion around CrA-9: protoplanet or obscured binary?

    Article • Monthly Notices of the Royal Astronomical Society, February 2021, Oxford University Press (OUP)

    STScI Scientist Julien H Girard

87. 
    Investigating three Sirius-like systems with SPHERE

    Article • EAS Publications Series, February 2021, EDP Sciences

    STScI Scientist Julien H Girard

88. 
    Data processing for high-contrast imaging with the James Webb Space Telescope

    Article • December 2020, SPIE

    STScI Scientist Julien H Girard

89. 
    Planet formation with all flavors of adaptive optics: VLT/MUSE’s laser tomography adaptive optics to directly image young accreting exoplanets

    Article • December 2020, SPIE

    STScI Scientist Julien H Girard

90. 
    The ExoGRAVITY project: using single mode interferometry to characterize exoplanets

    Article • December 2020, SPIE

    STScI Scientist Julien H Girard

91. 
    The Roman exoplanet Imaging data challenge: a major community engagement effort

    Article • December 2020, SPIE

    STScI Scientist Julien H Girard

92. 
    Searching for proto-planets with MUSE

    Article • EAS Publications Series, December 2020, EDP Sciences

    STScI Scientist Julien H Girard

93. 
    A Search for Polarized Thermal Emission from Directly Imaged Exoplanets and Brown Dwarf Companions to Nearby Stars

    Article • The Astronomical Journal, November 2020, American Astronomical Society

    STScI Scientist Julien H Girard

94. 
    Direct imaging of sub-Jupiter mass exoplanets with James Webb Space Telescope coronagraphy

    Article • Monthly Notices of the Royal Astronomical Society, November 2020, Oxford University Press (OUP)

    STScI Scientist Julien H Girard

95. 
    Direct confirmation of the radial-velocity planet β Pictoris c

    Article • EAS Publications Series, October 2020, EDP Sciences

    STScI Scientist Julien H Girard

96. 
    Unveiling the β Pictoris system, coupling high contrast imaging, interferometric, and radial velocity data

    Article • EAS Publications Series, October 2020, EDP Sciences

    STScI Scientist Julien H Girard

97. 
    CS Cha B: A disc-obscured M-type star mimicking a polarised planetary companion

    Article • EAS Publications Series, August 2020, EDP Sciences

    STScI Scientist Julien H Girard

98. 
    Retrieving scattering clouds and disequilibrium chemistry in the atmosphere of HR 8799e

    Article • EAS Publications Series, August 2020, EDP Sciences

    STScI Scientist Julien H Girard

99. 
    Dynamical Evidence of a Spiral Arm–driving Planet in the MWC 758 Protoplanetary Disk

    Article • The Astrophysical Journal Letters, July 2020, American Astronomical Society

    STScI Scientist Julien H Girard

100. 
     VLT/SPHERE survey for exoplanets around young early-type stars, including systems with multi-belt architectures

     Article • EAS Publications Series, July 2020, EDP Sciences

     STScI Scientist Julien H Girard

101. 
     Detection of Polarization due to Cloud Bands in the Nearby Luhman 16 Brown Dwarf Binary

     Article • The Astrophysical Journal, May 2020, American Astronomical Society

     STScI Scientist Julien H Girard

102. 
     ISPY-NACO Imaging Survey for Planets around Young stars

     Article • EAS Publications Series, March 2020, EDP Sciences

     STScI Scientist Julien H Girard

103. 
     RefPlanets: Search for reflected light from extrasolar planets with SPHERE/ZIMPOL

     Article • EAS Publications Series, February 2020, EDP Sciences

     STScI Scientist Julien H Girard

104. 
     Polarimetric imaging mode of VLT/SPHERE/IRDIS

     Article • EAS Publications Series, January 2020, EDP Sciences

     STScI Scientist Julien H Girard

105. 
     Polarimetric imaging mode of VLT/SPHERE/IRDIS

     Article • EAS Publications Series, January 2020, EDP Sciences

     STScI Scientist Julien H Girard

106. 
     Early formation and recent starburst activity in the nuclear disk of the Milky Way

     Article • Nature Astronomy, December 2019, Springer Science + Business Media

     STScI Scientist Julien H Girard

107. 
     NaCo polarimetric observations of Sz 91 transitional disc: a remarkable case of dust filtering

     Article • Monthly Notices of the Royal Astronomical Society, December 2019, Oxford University Press (OUP)

     STScI Scientist Julien H Girard

108. 
     SPHERE: the exoplanet imager for the Very Large Telescope

     Article • EAS Publications Series, November 2019, EDP Sciences

     STScI Scientist Julien H Girard

109. 
     GALACTICNUCLEUS: A high-angular-resolution JHKs imaging survey of the Galactic centre

     Article • EAS Publications Series, October 2019, EDP Sciences

     STScI Scientist Julien H Girard

110. 
     Constraining the properties of HD 206893 B

     Article • EAS Publications Series, August 2019, EDP Sciences

     STScI Scientist Julien H Girard

111. 
     The inner dust shell of Betelgeuse detected by polarimetric aperture-masking interferometry

     Article • EAS Publications Series, August 2019, EDP Sciences

     STScI Scientist Julien H Girard

112. 
     ISPY – NaCo Imaging Survey for Planets around Young stars

     Article • EAS Publications Series, July 2019, EDP Sciences

     STScI Scientist Julien H Girard

113. 
     Constraining the properties of HD 206893 B

     Article • EAS Publications Series, July 2019, EDP Sciences

     STScI Scientist Julien H Girard

114. 
     Two accreting protoplanets around the young star PDS 70

     Article • Nature Astronomy, June 2019, Springer Science + Business Media

     STScI Scientist Julien H Girard

115. 
     Evidence for a Circumplanetary Disk around Protoplanet PDS 70 b

     Article • The Astrophysical Journal Letters, June 2019, American Astronomical Society

     STScI Scientist Julien H Girard

116. 
     Separating extended disc features from the protoplanet in PDS 70 using VLT/SINFONI

     Article • Monthly Notices of the Royal Astronomical Society, May 2019, Oxford University Press (OUP)

     STScI Scientist Julien H Girard

117. 
     Kernel phase imaging with VLT/NACO: high-contrast detection of new candidate low-mass stellar companions at the diffraction limit

     Article • Monthly Notices of the Royal Astronomical Society, March 2019, Oxford University Press (OUP)

     STScI Scientist Julien H Girard

118. 
     SPHERE dynamical and spectroscopic characterization of HD 142527B

     Article • EAS Publications Series, February 2019, EDP Sciences

     STScI Scientist Julien H Girard

119. 
     A search for accreting young companions embedded in circumstellar disks

     Article • EAS Publications Series, February 2019, EDP Sciences

     STScI Scientist Julien H Girard

120. 
     Spectral and orbital characterisation of the directly imaged giant planet HIP 65426 b

     Article • EAS Publications Series, January 2019, EDP Sciences

     STScI Scientist Julien H Girard

121. 
     Post-conjunction detection of β Pictoris b with VLT/SPHERE

     Article • EAS Publications Series, January 2019, EDP Sciences

     STScI Scientist Julien H Girard

122. 
     Star formation history and metallicity in the Galactic inner bulge revealed by the red giant branch bump

     Article • EAS Publications Series, December 2018, EDP Sciences

     STScI Scientist Julien H Girard

123. 
     Dynamical masses of M-dwarf binaries in young moving groups

     Article • EAS Publications Series, November 2018, EDP Sciences

     STScI Scientist Julien H Girard

124. 
     Mapping of shadows cast on a protoplanetary disk by a close binary system

     Article • Nature Astronomy, November 2018, Springer Science + Business Media

     STScI Scientist Julien H Girard

125. 
     SPHERE/ZIMPOL high resolution polarimetric imager

     Article • EAS Publications Series, November 2018, EDP Sciences

     STScI Scientist Julien H Girard

126. 
     Dynamical masses of M-dwarf binaries in young moving groups

     Article • EAS Publications Series, October 2018, EDP Sciences

     STScI Scientist Julien H Girard

127. 
     Discovery of a planetary-mass companion within the gap of the transition disk around PDS 70

     Article • EAS Publications Series, September 2018, EDP Sciences

     STScI Scientist Julien H Girard

128. 
     Orbital and atmospheric characterization of the planet within the gap of the PDS 70 transition disk

     Article • EAS Publications Series, September 2018, EDP Sciences

     STScI Scientist Julien H Girard

129. 
     Characterization of low-mass companion HD 142527 B

     Article • EAS Publications Series, September 2018, EDP Sciences

     STScI Scientist Julien H Girard

130. 
     Medium-resolution integral-field spectroscopy for high-contrast exoplanet imaging

     Article • EAS Publications Series, September 2018, EDP Sciences

     STScI Scientist Julien H Girard

131. 
     Making good use of JWST's coronagraphs: tools and strategies from a user's perspective

     Article • August 2018, SPIE

     STScI Scientist Julien H Girard

132. 
     Lessons for WFIRST CGI from ground-based high-contrast systems

     Article • August 2018, SPIE

     STScI Scientist Julien H Girard

133. 
     Updated optical modeling of JWST coronagraph performance contrast, stability, and strategies

     Article • August 2018, SPIE

     STScI Scientist Julien H Girard

134. 
     Low wind effect on VLT/SPHERE: impact, mitigation strategy, and results

     Article • July 2018, SPIE

     STScI Scientist Julien H Girard

135. 
     The gravitational mass of Proxima Centauri measured with SPHERE from a microlensing event

     Article • Monthly Notices of the Royal Astronomical Society, July 2018, Oxford University Press (OUP)

     STScI Scientist Julien H Girard

136. 
     Physical, spectral, and dynamical properties of asteroid (107) Camilla and its satellites

     Article • Icarus, July 2018, Elsevier

     STScI Scientist Julien H Girard

137. 
     SAFARI – I. A SPHERE discovery of a super metal-rich M-dwarf companion to the star HD 86006

     Article • Monthly Notices of the Royal Astronomical Society, June 2018, Oxford University Press (OUP)

     STScI Scientist Julien H Girard

138. 
     First scattered light detection of a nearly edge-on transition disk around the T Tauri star RY Lupi

     Article • EAS Publications Series, June 2018, EDP Sciences

     STScI Scientist Julien H Girard

139. 
     Observations of fast-moving features in the debris disk of AU Mic on a three-year timescale: Confirmation and new discoveries

     Article • EAS Publications Series, June 2018, EDP Sciences

     STScI Scientist Julien H Girard

140. 
     Dynamical models to explain observations with SPHERE in planetary systems with double debris belts

     Article • EAS Publications Series, March 2018, EDP Sciences

     STScI Scientist Julien H Girard

141. 
     GALACTICNUCLEUS: A high angular resolution JHKs imaging survey of the Galactic centre

     Article • EAS Publications Series, February 2018, EDP Sciences

     STScI Scientist Julien H Girard

142. 
     In-depth study of moderately young but extremely red, very dusty substellar companion HD 206893B

     Article • EAS Publications Series, December 2017, EDP Sciences

     STScI Scientist Julien H Girard

143. 
     Investigation of the inner structures around HD 169142 with VLT/SPHERE

     Article • Monthly Notices of the Royal Astronomical Society, November 2017, Oxford University Press (OUP)

     STScI Scientist Julien H Girard

144. 
     The HIP 79977 debris disk in polarized light

     Article • EAS Publications Series, November 2017, EDP Sciences

     STScI Scientist Julien H Girard

145. 
     Combining angular differential imaging and accurate polarimetry with SPHERE/IRDIS to characterize young giant exoplanets

     Article • September 2017, SPIE

     STScI Scientist Julien H Girard

146. 
     Discovery of a warm, dusty giant planet around HIP 65426

     Article • EAS Publications Series, September 2017, EDP Sciences

     STScI Scientist Julien H Girard

147. 
     Exploring Dust around HD 142527 down to 0.″025 (4 au) Using SPHERE/ZIMPOL

     Article • The Astronomical Journal, June 2017, American Astronomical Society

     STScI Scientist Julien H Girard

148. 
     A Resolved and Asymmetric Ring of PAHs within the Young Circumstellar Disk of IRS 48

     Article • The Astrophysical Journal, June 2017, American Astronomical Society

     STScI Scientist Julien H Girard

149. 
     SPHERE/ZIMPOL observations of the symbiotic system R Aquarii

     Article • EAS Publications Series, June 2017, EDP Sciences

     STScI Scientist Julien H Girard

150. 
     A search for passive protoplanetary discs in the Taurus–Auriga star-forming region

     Article • Monthly Notices of the Royal Astronomical Society, May 2017, Oxford University Press (OUP)

     STScI Scientist Julien H Girard

151. 
     The VLT/NaCo large program to probe the occurrence of exoplanets and brown dwarfs at wide orbits. IV. Gravitational instability rarely forms wide, giant planets

     Article • EAS Publications Series, March 2017, EDP Sciences

     STScI Scientist Julien H Girard

152. 
     Three Radial Gaps in the Disk of TW Hydrae Imaged with SPHERE

     Article • The Astrophysical Journal, March 2017, American Astronomical Society

     STScI Scientist Julien H Girard

153. 
     Near-infrared scattered light properties of the HR 4796 A dust ring

     Article • EAS Publications Series, March 2017, EDP Sciences

     STScI Scientist Julien H Girard

154. 
     VLT/SPHERE robust astrometry of the HR8799 planets at milliarcsecond-level accuracy

     Article • EAS Publications Series, February 2017, EDP Sciences

     STScI Scientist Julien H Girard

155. 
     First Scattered-light Images of the Gas-rich Debris Disk around 49 Ceti

     Article • The Astrophysical Journal Letters, January 2017, American Astronomical Society

     STScI Scientist Julien H Girard

156. 
     Upper limits for mass and radius of objects around Proxima Cen from SPHERE/VLT

     Article • Monthly Notices of the Royal Astronomical Society Letters, January 2017, Oxford University Press (OUP)

     STScI Scientist Julien H Girard

157. 
     Discovery of a low-mass companion inside the debris ring surrounding the F5V star HD 206893

     Article • EAS Publications Series, December 2016, EDP Sciences

     STScI Scientist Julien H Girard

158. 
     MASSIVE: A Bayesian analysis of giant planet populations around low-mass stars

     Article • EAS Publications Series, December 2016, EDP Sciences

     STScI Scientist Julien H Girard

159. 
     The SHARDDS survey: First resolved image of the HD114082 debris disk in the Lower Centaurus Crux with SPHERE

     Article • EAS Publications Series, November 2016, EDP Sciences

     STScI Scientist Julien H Girard

160. 
     Direct detection of scattered light gaps in the transitional disk around HD 97048 with VLT/SPHERE

     Article • EAS Publications Series, November 2016, EDP Sciences

     STScI Scientist Julien H Girard

161. 
     Multiple rings in the transition disk and companion candidates around RX J1615.3-3255

     Article • EAS Publications Series, November 2016, EDP Sciences

     STScI Scientist Julien H Girard

162. 
     The origin of the dusty envelope around Betelgeuse

     Article • Proceedings of the International Astronomical Union, November 2016, Cambridge University Press

     STScI Scientist Julien H Girard

163. 
     BP Piscium: its flaring disc imaged with SPHERE/ZIMPOL

     Article • Monthly Notices of the Royal Astronomical Society Letters, October 2016, Oxford University Press (OUP)

     STScI Scientist Julien H Girard

164. 
     Sparse aperture masking at the VLT

     Article • EAS Publications Series, October 2016, EDP Sciences

     STScI Scientist Julien H Girard

165. 
     ABISM: an interactive image quality and Strehl ratio measurement tool for adaptive optics instruments

     Article • September 2016, SPIE

     STScI Scientist Julien H Girard

166. 
     Interferometric direct imaging properties of a BIGRE-DAM device in laboratory

     Article • August 2016, SPIE

     STScI Scientist Julien H Girard

167. 
     Pushing down with the contrast: scientific performances with SPHERE-IFS

     Article • August 2016, SPIE

     STScI Scientist Julien H Girard

168. 
     SPHERE IRDIS and IFS astrometric strategy and calibration

     Article • August 2016, SPIE

     STScI Scientist Julien H Girard

169. 
     Three years of harvest with the vector vortex coronagraph in the thermal infrared

     Article • August 2016, SPIE

     Dr Bruno Femenia Castella, STScI Scientist Julien H Girard

170. 
     SPHERE on-sky performance compared with budget predictions

     Article • August 2016, SPIE

     STScI Scientist Julien H Girard

171. 
     Sparse aperture masking with SPHERE

     Article • August 2016, SPIE

     STScI Scientist Julien H Girard

172. 
     Calibration of quasi-static aberrations in exoplanet direct-imaging instruments with a Zernike phase-mask sensor

     Article • EAS Publications Series, August 2016, EDP Sciences

     STScI Scientist Julien H Girard

173. 
     Speckle lifetime in XAO coronagraphic images: temporal evolution of SPHERE coronagraphic images

     Article • July 2016, SPIE

     STScI Scientist Julien H Girard

174. 
     ZELDA, a Zernike wavefront sensor for the fine measurement of quasi-static aberrations in coronagraphic systems: concept studies and results with VLT/SPHERE

     Article • July 2016, SPIE

     STScI Scientist Julien H Girard

175. 
     Tackling down the low wind effect on SPHERE instrument

     Article • July 2016, SPIE

     STScI Scientist Julien H Girard

176. 
     SAXO, the SPHERE extreme AO system: on-sky final performance and future improvements

     Article • July 2016, SPIE

     STScI Scientist Julien H Girard

177. 
     Quality control and data flow operations of SPHERE

     Article • July 2016, SPIE

     STScI Scientist Julien H Girard

178. 
     Training telescope operators and support astronomers at Paranal

     Article • July 2016, SPIE

     STScI Scientist Julien H Girard

179. 
     Discovery of concentric broken rings at sub-arcsec separations in the HD 141569A gas-rich, debris disk with VLT/SPHERE

     Article • EAS Publications Series, May 2016, EDP Sciences

     STScI Scientist Julien H Girard

180. 
     SAXO: the extreme adaptive optics system of SPHERE (I) system overview and global laboratory performance

     Article • Journal of Astronomical Telescopes Instruments and Systems, May 2016, SPIE

     STScI Scientist Julien H Girard

181. 
     An M-dwarf star in the transition disk of Herbig HD 142527

     Article • EAS Publications Series, May 2016, EDP Sciences

     STScI Scientist Julien H Girard

182. 
     Luminous blue variables: An imaging perspective on their binarity and near environment

     Article • EAS Publications Series, February 2016, EDP Sciences

     STScI Scientist Julien H Girard

183. 
     First light of the VLT planet finder SPHERE

     Article • EAS Publications Series, February 2016, EDP Sciences

     STScI Scientist Julien H Girard

184. 
     First light of the VLT planet finder SPHERE

     Article • EAS Publications Series, February 2016, EDP Sciences

     STScI Scientist Julien H Girard

185. 
     First light of the VLT planet finder SPHERE

     Article • EAS Publications Series, February 2016, EDP Sciences

     STScI Scientist Julien H Girard

186. 
     First light of the VLT planet finder SPHERE

     Article • EAS Publications Series, February 2016, EDP Sciences

     STScI Scientist Julien H Girard

187. 
     A narrow, edge-on disk resolved around HD 106906 with SPHERE

     Article • EAS Publications Series, February 2016, EDP Sciences

     STScI Scientist Julien H Girard

188. 
     The VLT/NaCo large program to probe the occurrence of exoplanets and brown dwarfs at wide orbits

     Article • EAS Publications Series, February 2016, EDP Sciences

     STScI Scientist Julien H Girard

189. 
     Adaptive Optics in High-Contrast Imaging

     Article • January 2016, Springer Science + Business Media

     STScI Scientist Julien H Girard

190. 
     Variability and dust filtration in the transition disk J160421.7-213028 observed in optical scattered light

     Article • EAS Publications Series, November 2015, EDP Sciences

     STScI Scientist Julien H Girard

191. 
     Fast-moving features in the debris disk around AU Microscopii

     Article • Nature, October 2015, Springer Science + Business Media

     STScI Scientist Julien H Girard

192. 
     PLUTO’s ATMOSPHERE FROM STELLAR OCCULTATIONS IN 2012 AND 2013

     Article • The Astrophysical Journal, September 2015, American Astronomical Society

     STScI Scientist Julien H Girard

193. 
     CONFIRMATION AND CHARACTERIZATION OF THE PROTOPLANET HD 100546 b—DIRECT EVIDENCE FOR GAS GIANT PLANET FORMATION AT 50 AU

     Article • The Astrophysical Journal, July 2015, American Astronomical Society

     STScI Scientist Julien H Girard

194. 
     The dust disk and companion of the nearby AGB star L2 Puppis

     Article • EAS Publications Series, June 2015, EDP Sciences

     STScI Scientist Julien H Girard

195. 
     The inner environment of Z Canis Majoris: High-contrast imaging polarimetry with NaCo

     Article • EAS Publications Series, May 2015, EDP Sciences

     STScI Scientist Julien H Girard

196. 
     WISE J061213.85-303612.5: a new T-dwarf binary candidate

     Article • EAS Publications Series, May 2015, EDP Sciences

     STScI Scientist Julien H Girard

197. 
     New constraints on the dust surrounding HR 4796A

     Article • EAS Publications Series, May 2015, EDP Sciences

     STScI Scientist Julien H Girard

198. 
     The VLT/NaCo large program to probe the occurrence of exoplanets and brown dwarfs at wide orbits

     Article • EAS Publications Series, January 2015, EDP Sciences

     STScI Scientist Julien H Girard

199. 
     DEEP THERMAL INFRARED IMAGING OF HR 8799 bcde: NEW ATMOSPHERIC CONSTRAINTS AND LIMITS ON A FIFTH PLANET

     Article • The Astrophysical Journal, October 2014, American Astronomical Society

     STScI Scientist Julien H Girard

200. 
     Discretized aperture mapping with a micro-lenses array for interferometric direct imaging

     Article • August 2014, SPIE

     STScI Scientist Julien H Girard

201. 
     DISCOVERY OF A COMPANION CANDIDATE IN THE HD 169142 TRANSITION DISK AND THE POSSIBILITY OF MULTIPLE PLANET FORMATION

     Article • The Astrophysical Journal Letters, August 2014, American Astronomical Society

     STScI Scientist Julien H Girard

202. 
     Atmospheric parameter estimation from AO wavefront sensing data: application of the FADE method with NACO

     Article • August 2014, SPIE

     STScI Scientist Julien H Girard

203. 
     Final performance and lesson-learned of SAXO, the VLT-SPHERE extreme AO: from early design to on-sky results

     Article • August 2014, SPIE

     STScI Scientist Julien H Girard

204. 
     Real-time Strehl and image quality performance estimator at Paranal Observatory

     Article • August 2014, SPIE

     STScI Scientist Julien H Girard

205. 
     Characterizing instrumental effects on polarization at a Nasmyth focus using NaCo

     Article • July 2014, SPIE

     STScI Scientist Julien H Girard

206. 
     Searching for visual companions of close Cepheids

     Article • EAS Publications Series, July 2014, EDP Sciences

     STScI Scientist Julien H Girard

207. 
     Very deep images of the innermost regions of theβPictoris debris disc atL′

     Article • EAS Publications Series, June 2014, EDP Sciences

     STScI Scientist Julien H Girard

208. 
     Ground-based transit observations of the super-Earth GJ 1214 b

     Article • EAS Publications Series, April 2014, EDP Sciences

     STScI Scientist Julien H Girard

209. 
     CHARACTERIZATION OF THE BENCHMARK BINARY NLTT 33370,

     Article • The Astrophysical Journal, February 2014, American Astronomical Society

     STScI Scientist Julien H Girard

210. 
     Possible astrometric discovery of a substellar companion to the closest binary brown dwarf system WISE J104915.57–531906.1

     Article • EAS Publications Series, December 2013, EDP Sciences

     STScI Scientist Julien H Girard

211. 
     CONFIRMATION OF THE PLANET AROUND HD 95086 BY DIRECT IMAGING

     Article • The Astrophysical Journal Letters, December 2013, American Astronomical Society

     STScI Scientist Julien H Girard

212. 
     Searching for companions down to 2 AU fromβPictoris using theL′-band AGPM coronagraph on VLT/NACO

     Article • EAS Publications Series, November 2013, EDP Sciences

     STScI Scientist Julien H Girard

213. 
     ERRATUM: “DISCOVERY OF A PROBABLE 4-5 JUPITER-MASS EXOPLANET TO HD 95086 BY DIRECT-IMAGING” (2013, ApJL, 772, L15)

     Article • The Astrophysical Journal Letters, September 2013, American Astronomical Society

     STScI Scientist Julien H Girard

214. 
     Small-angle, high-contrast exoplanet imaging with the L-band AGPM vector vortex coronagraph now offered at the VLT

     Article • September 2013, SPIE

     STScI Scientist Julien H Girard

215. 
     Adaptive phase-mask coronagraph with amplitude and phase modulation for high dynamic range synchronous detection: APM2coronagraph

     Article • September 2013, SPIE

     STScI Scientist Julien H Girard

216. 
     A COMBINED VERY LARGE TELESCOPE AND GEMINI STUDY OF THE ATMOSPHERE OF THE DIRECTLY IMAGED PLANET, β PICTORIS b

     Article • The Astrophysical Journal, September 2013, American Astronomical Society

     STScI Scientist Julien H Girard

217. 
     A MULTIPLICITY CENSUS OF INTERMEDIATE-MASS STARS IN SCORPIUS-CENTAURUS

     Article • The Astrophysical Journal, August 2013, American Astronomical Society

     STScI Scientist Julien H Girard

218. 
     Prospects of detecting the polarimetric signature of the Earth-mass planetαCentauri B b with SPHERE/ZIMPOL

     Article • EAS Publications Series, July 2013, EDP Sciences

     STScI Scientist Julien H Girard

219. 
     DISCOVERY OF A PROBABLE 4-5 JUPITER-MASS EXOPLANET TO HD 95086 BY DIRECT IMAGING

     Article • The Astrophysical Journal Letters, July 2013, American Astronomical Society

     STScI Scientist Julien H Girard

220. 
     The near-infrared spectral energy distribution ofβPictoris b

     Article • EAS Publications Series, July 2013, EDP Sciences

     STScI Scientist Julien H Girard

221. 
     CHARACTERIZATION OF THE NEARBY L/T BINARY BROWN DWARF WISE J104915.57–531906.1 AT 2 pc FROM THE SUN

     Article • The Astrophysical Journal, June 2013, American Astronomical Society

     STScI Scientist Julien H Girard

222. 
     Companion search around β Pictoris with the newly commissioned L'-band vector vortex coronagraph on VLT/NACO

     Article • Proceedings of the International Astronomical Union, June 2013, Cambridge University Press

     STScI Scientist Julien H Girard

223. 
     First High-Angular Resolution L′ Images of the β Pictoris Debris Disc with the VLT / NaCo

     Article • Proceedings of the International Astronomical Union, June 2013, Cambridge University Press

     STScI Scientist Julien H Girard

224. 
     Properties of the young gas giant planet β Pictoris b

     Article • Proceedings of the International Astronomical Union, June 2013, Cambridge University Press

     STScI Scientist Julien H Girard

225. 
     Successes and challenges of the APP Coronagraph

     Article • Proceedings of the International Astronomical Union, June 2013, Cambridge University Press

     STScI Scientist Julien H Girard

226. 
     β Pictoris b Orbital Properties

     Article • Proceedings of the International Astronomical Union, June 2013, Cambridge University Press

     STScI Scientist Julien H Girard

227. 
     A survey of young, nearby, and dusty stars conducted to understand the formation of wide-orbit giant planets

     Article • EAS Publications Series, May 2013, EDP Sciences

     STScI Scientist Julien H Girard

228. 
     Direct-imaging discovery of a 12–14 Jupiter-mass object orbiting a young binary system of very low-mass stars

     Article • EAS Publications Series, May 2013, EDP Sciences

     STScI Scientist Julien H Girard

229. 
     L’-band AGPM vector vortex coronagraph’s first light on VLT/NACO

     Article • EAS Publications Series, April 2013, EDP Sciences

     STScI Scientist Julien H Girard

230. 
     A YOUNG PROTOPLANET CANDIDATE EMBEDDED IN THE CIRCUMSTELLAR DISK OF HD 100546

     Article • The Astrophysical Journal Letters, February 2013, American Astronomical Society

     STScI Scientist Julien H Girard

231. 
     CORONAGRAPHIC OBSERVATIONS OF FOMALHAUT AT SOLAR SYSTEM SCALES

     Article • The Astrophysical Journal, January 2013, American Astronomical Society

     STScI Scientist Julien H Girard

232. 
     Flows of gas through a protoplanetary gap

     Article • Nature, January 2013, Springer Science + Business Media

     STScI Scientist Julien H Girard

233. 
     Holographic imaging of crowded fields: high angular resolution imaging with excellent quality at very low cost

     Article • Monthly Notices of the Royal Astronomical Society, December 2012, Oxford University Press (OUP)

     STScI Scientist Julien H Girard

234. 
     High-contrast imaging of the close environment of HD 142527

     Article • EAS Publications Series, September 2012, EDP Sciences

     STScI Scientist Julien H Girard

235. 
     Conceptual study for a sub-pupil instrument having 4 high order adaptive optics path for parallel multi-wavelength high contrast imaging, and medium resolution spectrometry

     Article • September 2012, SPIE

     STScI Scientist Julien H Girard

236. 
     NEW BROWN DWARF COMPANIONS TO YOUNG STARS IN SCORPIUS-CENTAURUS

     Article • The Astrophysical Journal Letters, September 2012, American Astronomical Society

     STScI Scientist Julien H Girard

237. 
     Extinction controlled adaptive mask coronagraph Lyot and phase mask dual concept for wide extinction area

     Article • September 2012, SPIE

     STScI Scientist Julien H Girard

238. 
     Image quality and high contrast improvements on VLT/NACO

     Article • September 2012, SPIE

     STScI Scientist Julien H Girard

239. 
     What can be retrieved from adaptive optics real-time data?

     Article • September 2012, SPIE

     STScI Scientist Julien H Girard

240. 
     Speckle imaging observations of 2005 YU55 with the NACO-VLT no-AO mode

     Article • September 2012, SPIE

     STScI Scientist Julien H Girard

241. 
     Review of small-angle coronagraphic techniques in the wake of ground-based second-generation adaptive optics systems

     Article • August 2012, SPIE

     STScI Scientist Julien H Girard

242. 
     Direct imaging of extra-solar planets in star forming regions

     Article • EAS Publications Series, August 2012, EDP Sciences

     STScI Scientist Julien H Girard

243. 
     Orbital characterization of theβPictoris b giant planet

     Article • EAS Publications Series, June 2012, EDP Sciences

     STScI Scientist Julien H Girard

244. 
     The position ofβPictoris b position relative to the debris disk

     Article • EAS Publications Series, June 2012, EDP Sciences

     STScI Scientist Julien H Girard

245. 
     Direct imaging with a dense aperture masking in comparison with a telescope or a hypertelelescope

     Article • September 2011, SPIE

     STScI Scientist Julien H Girard

246. 
     The hypertelescope at work with a BIGRE integral field unit

     Article • September 2011, SPIE

     STScI Scientist Julien H Girard

247. 
     On Our Multi-Wavelength Campaign of the 2011 Outburst of T Pyx

     Article • Proceedings of the International Astronomical Union, September 2011, Cambridge University Press

     STScI Scientist Julien H Girard

248. 
     SEARCHING FOR GAS GIANT PLANETS ON SOLAR SYSTEM SCALES: VLT NACO/APP OBSERVATIONS OF THE DEBRIS DISK HOST STARS HD172555 AND HD115892

     Article • The Astrophysical Journal Letters, July 2011, American Astronomical Society

     STScI Scientist Julien H Girard

249. 
     High angular resolution detection ofβ Pictoris b at 2.18 μm

     Article • EAS Publications Series, March 2011, EDP Sciences

     STScI Scientist Julien H Girard

250. 
     Spatially extended emission around the Cepheid RS Puppis in near-infrared hydrogen lines

     Article • EAS Publications Series, January 2011, EDP Sciences

     STScI Scientist Julien H Girard

251. 
     Adaptive optics observations of the T10 ultracool dwarf UGPS J072227.51-054031.2

     Article • EAS Publications Series, December 2010, EDP Sciences

     STScI Scientist Julien H Girard

252. 
     FIRST RESULTS FROM VERY LARGE TELESCOPE NACO APODIZING PHASE PLATE: 4 μm IMAGES OF THE EXOPLANET β PICTORIS b

     Article • The Astrophysical Journal Letters, September 2010, American Astronomical Society

     STScI Scientist Julien H Girard

253. 
     An apodizing phase plate coronagraph for VLT/NACO

     Article • July 2010, SPIE

     STScI Scientist Julien H Girard

254. 
     Evaluation of performance of the MACAO systems at the VLTI

     Article • July 2010, SPIE

     STScI Scientist Julien H Girard

255. 
     Speckle imaging with the SOAR and the very large telescopes

     Article • July 2010, SPIE

     STScI Scientist Julien H Girard

256. 
     Status and new operation modes of the versatile VLT/NaCo

     Article • July 2010, SPIE

     STScI Scientist Julien H Girard

257. 
     High-angular resolution observations of the Pistol star

     Article • Proceedings of the International Astronomical Union, July 2010, Cambridge University Press

     STScI Scientist Julien H Girard

258. 
     GUIELOA, the Mexican adaptive optics system: expected performance and operation

     Article • July 2008, SPIE

     STScI Scientist Julien H Girard

259. 
     Follow-up observations of binary ultra-cool dwarfs

     Article • EAS Publications Series, February 2008, EDP Sciences

     STScI Scientist Julien H Girard

260. 
     The Polychromatic Laser Guide Star for tilt measurement: progress report of the demonstrator at Observatoire de Haute Provence

     Article • September 2007, SPIE

     STScI Scientist Julien H Girard

261. 
     Techniques for measuring atmospheric aerosols at the high resolution fly’s eye experiment

     Article • Astroparticle Physics, February 2006, Elsevier

     STScI Scientist Julien H Girard

262. 
     Monocular measurement of the spectrum of UHE cosmic rays by the FADC detector of the HiRes experiment

     Article • Astroparticle Physics, March 2005, Elsevier

     STScI Scientist Julien H Girard

263. 
     Measurement of the Flux of Ultrahigh Energy Cosmic Rays from Monocular Observations by the High Resolution Fly’s Eye Experiment

     Article • Physical Review Letters, April 2004, American Physical Society (APS)

     STScI Scientist Julien H Girard

264. 
     Feasibility study of the polychromatic laser guide star

     Article • February 2003, SPIE

     STScI Scientist Julien H Girard

265. 
     Geometry and optics calibration for air fluorescence detectors using star light

     Article • Astroparticle Physics, December 2002, Elsevier

     STScI Scientist Julien H Girard

266. 
     A fiber-optic-based calibration system for the High Resolution Fly's Eye cosmic ray observatory

     Article • Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment, March 2001, Elsevier

     STScI Scientist Julien H Girard