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Herschel SPIRE fourier transform spectrometer: calibration of its bright-source mode

Lu, Nanyao and Polehampton, Edward T. and Swinyard, Burce M. and Benielli, Dominique and Fulton, Trevor and Hopwood, Rosalind and Imhof, Peter and Lim, Tanya and Marchili, Nicola and Naylor, David A. and Schulz, Bernhard and Sidher, Sunil and Valtchanov, Ivan (2014) Herschel SPIRE fourier transform spectrometer: calibration of its bright-source mode. Experimental Astronomy, 37 (2). pp. 239-252. ISSN 0922-6435. doi:10.1007/s10686-013-9359-9.

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The Fourier Transform Spectrometer (FTS) of the Spectral and Photometric Imaging REceiver (SPIRE) on board the ESA Herschel Space Observatory has two detector setting modes: (a) a nominal mode, which is optimized for observing moderately bright to faint astronomical targets, and (b) a bright-source mode recommended for sources significantly brighter than 500 Jy, within the SPIRE FTS bandwidth of 446.7–1544 GHz (or 194–671 microns in wavelength), which employs a reduced detector responsivity and out-of-phase analog signal amplifier/demodulator. We address in detail the calibration issues unique to the bright-source mode, describe the integration of the bright-mode data processing into the existing pipeline for the nominal mode, and show that the flux calibration accuracy of the bright-source mode is generally within 2 % of that of the nominal mode, and that the bright-source mode is 3 to 4 times less sensitive than the nominal mode.

Item Type:Article
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URLURL TypeDescription Paper ReadCube access
Lu, Nanyao0000-0002-8948-1044
Valtchanov, Ivan0000-0001-9930-7886
Additional Information:© 2013 Springer Science+Business Media Dordrecht. Received: 29 June 2013; Accepted: 26 September 2013; Published online: 19 October 2013. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with important participation from NASA. We thank both an anonymous referee and Dr. Locke Spencer for their useful comments that helped improve the overall clarity of the paper. SPIRE has been developed by a consortium of institutes led by Cardiff University (UK) and including Univ. Lethbridge (Canada); NAOC (China); CEA, LAM (France); IFSI, Univ. Padua (Italy); IAC (Spain); Stockholm Observatory (Sweden); Imperial College London, RAL, UCL-MSSL, UKATC, Univ. Sussex (UK); and Caltech, JPL, NHSC, Univ. Colorado (USA). This development has been supported by national funding agencies: CSA (Canada); NAOC (China); CEA, CNES, CNRS (France); ASI (Italy); MCINN (Spain); SNSB (Sweden); STFC (UK); and NASA (USA). The Herschel spacecraft was designed, built, tested, and launched under a contract to ESA managed by the Herschel/Planck Project team by an industrial consortium under the overall responsibility of the prime contractor Thales Alenia Space (Cannes), and including Astrium (Friedrichshafen) responsible for the payload module and for system testing at spacecraft level, Thales Alenia Space (Turin) responsible for the service module, and Astrium (Toulouse) responsible for the telescope, with in excess of a hundred subcontractors. Support for this work was in part provided by NASA through an award issued by JPL/Caltech.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Canadian Space Agency (CSA)UNSPECIFIED
National Astronomical Observatories, Chinese Academy of Sciences (NAOC)UNSPECIFIED
Commissariat à l’Energie Atomique (CEA)UNSPECIFIED
Centre National d'Études Spatiales (CNES)UNSPECIFIED
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
Agenzia Spaziale Italiana (ASI)UNSPECIFIED
Ministerio de Ciencia e Innovación (MCINN)UNSPECIFIED
Swedish National Space Board (SNSB)UNSPECIFIED
Science and Technology Facilities Council (STFC)UNSPECIFIED
Subject Keywords:Instrumentation; Calibration; Herschel space observatory; Fourier transform spectrometer; Sub-millimeter astronomy
Issue or Number:2
Record Number:CaltechAUTHORS:20140829-084226679
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Official Citation:Lu, N., Polehampton, E.T., Swinyard, B.M. et al. Exp Astron (2014) 37: 239. doi:10.1007/s10686-013-9359-9
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49050
Deposited By: Jason Perez
Deposited On:29 Aug 2014 17:32
Last Modified:10 Nov 2021 18:39

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