
Proceedings Paper
FIFI-LS: the facility far-infrared spectrometer for SOFIAFormat | Member Price | Non-Member Price |
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Paper Abstract
FIFI-LS is the German far-infrared integral field spectrometer for the SOFIA airborne observatory. The instrument offers
medium resolution spectroscopy (R ~ a few 1000) in the far-infrared with two independent spectrometers covering 50-110
and 100-200 μm. The integral field units of the two spectrometers obtain spectra covering concentric square fields-of-views
sized 3000and 6000, respectively. Both spectrometers can observe simultaneously at any wavelength in their ranges making
efficient mapping of far-infrared lines possible.
FIFI-LS has been commissioned at the airborne observatory SOFIA as a PI instrument in spring 2014. During 2015,
the commissioning as facility instrument will be complete and the SOFIA observatory will take over the operation of
FIFI-LS. The instrument can already be used by the community. Primary science cases are the study of the galactic and
extra-galactic interstellar medium and its processes.
In this presentation, the capabilities of FIFI-LS on the SOFIA telescope will be explained and how they are used by the
offered observing modes. The remaining atmosphere and the warm telescope create a high background situation, which
requires a differential measurement technique. This is achieved by SOFIA’s chopping secondary mirror and nodding the
telescope. Depending on the source size, different observing modes may be used to observe a source. All modes use spatial
and spectral dithering. The resulting data products will be 3D-data cubes.
The observing parameters will be specified using AOTs, like the other SOFIA instruments, and created via the tool
SSPOT which is similar to the Spitzer Space Telescope SPOT tool. The observations will be done in service mode, but
SOFIA invites a few investigators to fly onboard SOFIA during (part of) their observations.
Paper Details
Date Published: 8 July 2014
PDF: 8 pages
Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91472X (8 July 2014); doi: 10.1117/12.2055371
Published in SPIE Proceedings Vol. 9147:
Ground-based and Airborne Instrumentation for Astronomy V
Suzanne K. Ramsay; Ian S. McLean; Hideki Takami, Editor(s)
PDF: 8 pages
Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 91472X (8 July 2014); doi: 10.1117/12.2055371
Show Author Affiliations
Randolf Klein, SOFIA-USRA, NASA Ames Research Ctr. (United States)
Simon Beckmann, Univ. Stuttgart (Germany)
Aaron Bryant, Univ. Stuttgart (Germany)
Sebastian Colditz, Univ. Stuttgart (Germany)
Christian Fischer, Univ. Stuttgart (Germany)
Fabio Fumi, Univ. Stuttgart (Germany)
Norbert Geis, Max-Planck-Institut für extraterrestrische Physik (Germany)
Simon Beckmann, Univ. Stuttgart (Germany)
Aaron Bryant, Univ. Stuttgart (Germany)
Sebastian Colditz, Univ. Stuttgart (Germany)
Christian Fischer, Univ. Stuttgart (Germany)
Fabio Fumi, Univ. Stuttgart (Germany)
Norbert Geis, Max-Planck-Institut für extraterrestrische Physik (Germany)
Rainer Hönle, Univ. Stuttgart (Germany)
Alfred Krabbe, Univ. Stuttgart (Germany)
Leslie Looney, Univ. of Illinois at Urbana-Champaign (United States)
Albrecht Poglitsch, Max-Planck-Institut für extraterrestrische Physik (Germany)
Walfried Raab, Max-Planck-Institut für extraterrestrische Physik (Germany)
Felix Rebell, Univ. Stuttgart (Germany)
Maureen Savage, SOFIA-USRA, NASA Ames Research Ctr. (United States)
Alfred Krabbe, Univ. Stuttgart (Germany)
Leslie Looney, Univ. of Illinois at Urbana-Champaign (United States)
Albrecht Poglitsch, Max-Planck-Institut für extraterrestrische Physik (Germany)
Walfried Raab, Max-Planck-Institut für extraterrestrische Physik (Germany)
Felix Rebell, Univ. Stuttgart (Germany)
Maureen Savage, SOFIA-USRA, NASA Ames Research 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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