Lyman-α Observations of Comet Holmes from SORCE SOLSTICE and SOHO SWAN

  • Wayne R. Pryor
  • Martin Snow
  • Eric Quémerais
  • Stéphane Ferron
Part of the ISSI Scientific Report Series book series (ISSI, volume 13)


In November 2007, the Solar Wind Anisotropy (SWAN) instrument on the Solar and Heliospheric Observatory (SOHO) and the SOLar-STellar Irradiance Comparison Experiment (SOLSTICE) on the SOlar Radiation and Climate Experiment (SORCE) both made observations of comet 17P/Holmes at Lyman-α wavelengths. The intent of these observations was to compare the calibration of SWAN and SOLSTICE, rather than to study the properties of comets. The two datasets require significant processing to remove interplanetary and geocoronal backgrounds which increased the uncertainty of the result. However, both instruments measured similar Lyman-α irradiances, confirming their calibration agreement.


Roll Angle Hubble Space Telescope Irradiance Measurement Background Star Ecliptic Longitude 
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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Wayne R. Pryor
    • 1
    • 2
  • Martin Snow
    • 3
  • Eric Quémerais
    • 4
  • Stéphane Ferron
    • 5
  1. 1.Central Arizona CollegeCoolidgeUSA
  2. 2.LASP, University of Colorado and Space Environment TechnologiesPalisadesUSA
  3. 3.Laboratory for Atmospheric and Space PhysicsUniversity of ColoradoBoulderUSA
  4. 4.LATMOS-IPSL Université Versailles-SaintQuentinGuyancourtFrance
  5. 5.ACRI-STGuyancourtFrance

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