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Proceedings Paper

HIPO in-flight performance improvements
Author(s): E. W. Dunham; T. A. Bida; P. L. Collins; Georgi Mandushev; S. Zoonematkermani; J. Van Cleve; D. Angerhausen; Avi Mandell
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Paper Abstract

The High-speed Imaging Photometer for Occultations (HIPO) is a special purpose science instrument for SOFIA. HIPO can be co-mounted with FLITECAM in the so-called FLIPO configuration for stellar occultation or extrasolar planet transit observations. We gained some flight experience with HIPO and FLITECAM in 2011 as described in a previous publication (Dunham, et al., Proc SPIE, 8446-42, 2012). Since that time a number of improvements to HIPO have been made and a deeper understanding of the airborne environment's impact on photometric precision at optical wavelengths has been obtained. The improvements to HIPO include an improved beamsplitter for the FLIPO configuration, adding deep depletion CCDs as a detector option, expanding the filter set to include a Sloan Digital Sky Survey filter set as well as two custom filters for transit work, and an ability to guide the SOFIA telescope using HIPO data being acquired for science purposes. We now understand that variations in PSF size due to varying static air density has a noticeable impact on photometric stability while the related effect of Mach number is unimportant. The seriousness of ozone absorption in the Chappuis band is now understood and an approach to avoid this has been found. Finally we present demonstration transit data to illustrate our current transit photometry capability.

Paper Details

Date Published: 8 July 2014
PDF: 16 pages
Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91470H (8 July 2014); doi: 10.1117/12.2057405
Show Author Affiliations
E. W. Dunham, Lowell Observatory (United States)
T. A. Bida, Lowell Observatory (United States)
P. L. Collins, Lowell Observatory (United States)
Georgi Mandushev, Lowell Observatory (United States)
S. Zoonematkermani, Lowell Observatory (United States)
J. Van Cleve, Universities Space Research Association (United States)
D. Angerhausen, Rensselaer Polytechnic Institute (United States)
Avi Mandell, NASA Goddard Space Flight Ctr. (United States)

Published in SPIE Proceedings Vol. 9147:
Ground-based and Airborne Instrumentation for Astronomy V
Suzanne K. Ramsay; Ian S. McLean; Hideki Takami, Editor(s)

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