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Journal of Astronomical Telescopes, Instruments, and Systems

First exoplanet transit observation with the Stratospheric Observatory for Infrared Astronomy: confirmation of Rayleigh scattering in HD 189733 b with the High-Speed Imaging Photometer for Occultations
Author(s): Daniel Angerhausen; Georgi I. Mandushev; Edward W. Dunham; Peter L. Collins; Avi Mandell; Eric E. Becklin; Ryan T. Hamilton; Sarah E. Logsdon; Michael W. McElwain; Ian S. McLean; Enrico Pfüller; Maureen L. Savage; Sachindev S. Shenoy; William D. Vacca; Jeffrey E. Van Cleve; Jürgen Wolf
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Paper Abstract

Here, we report on the first successful exoplanet transit observation with the Stratospheric Observatory for Infrared Astronomy (SOFIA). We observed a single transit of the hot Jupiter HD 189733 b, obtaining two simultaneous primary transit lightcurves in the B and z′ bands as a demonstration of SOFIA’s capability to perform absolute transit photometry. We present a detailed description of our data reduction, in particular, the correlation of photometric systematics with various in-flight parameters unique to the airborne observing environment. The derived transit depths at B and z′ wavelengths confirm a previously reported slope in the optical transmission spectrum of HD 189733 b. Our results give new insights to the current discussion about the source of this Rayleigh scattering in the upper atmosphere and the question of fixed limb darkening coefficients in fitting routines.

Paper Details

Date Published: 7 July 2015
PDF: 12 pages
J. Ast. Inst. Sys. 1(3) 034002 doi: 10.1117/1.JATIS.1.3.034002
Published in: Journal of Astronomical Telescopes, Instruments, and Systems Volume 1, Issue 3
Show Author Affiliations
Daniel Angerhausen, NASA Goddard Space Flight Ctr. (United States)
Rensselaer Polytechnic Institute (United States)
Georgi I. Mandushev, Lowell Observatory (United States)
Edward W. Dunham, Lowell Observatory (United States)
Peter L. Collins, Lowell Observatory (United States)
Avi Mandell, NASA Goddard Space Flight Ctr. (United States)
Eric E. Becklin, Univ. of California, Los Angeles (United States)
SOFIA / USRA (United States)
Ryan T. Hamilton, SOFIA / USRA (United States)
Sarah E. Logsdon, Univ. of California, Los Angeles (United States)
Michael W. McElwain, NASA Goddard Space Flight Ctr. (United States)
Ian S. McLean, Univ. of California, Los Angeles (United States)
Enrico Pfüller, Deutsches SOFIA Institut (Germany)
Maureen L. Savage, SOFIA / USRA (United States)
Sachindev S. Shenoy, SOFIA / USRA (United States)
William D. Vacca, SOFIA / USRA (United States)
Jeffrey E. Van Cleve, SOFIA / USRA (United States)
Jürgen Wolf, University of Stuttgart (Germany)


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