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Herschel SPIRE FTS relative spectral response calibration

Fulton, Trevor and Hopwood, Rosalind and Baluteau, Jean-Paul and Benielli, Dominique and Imhof, Peter and Lim, Tanya and Lu, Nanyao and Marchili, Nicola and Naylor, David and Polehampton, Edward T. and Swinyard, Bruce and Valtchanov, Ivan (2014) Herschel SPIRE FTS relative spectral response calibration. Experimental Astronomy, 37 (2). pp. 381-395. ISSN 0922-6435. doi:10.1007/s10686-013-9364-z.

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Herschel/SPIRE Fourier transform spectrometer (FTS) observations contain emission from both the Herschel Telescope and the SPIRE Instrument itself, both of which are typically orders of magnitude greater than the emission from the astronomical source, and must be removed in order to recover the source spectrum. The effects of the Herschel Telescope and the SPIRE Instrument are removed during data reduction using relative spectral response calibration curves and emission models. We present the evolution of the methods used to derive the relative spectral response calibration curves for the SPIRE FTS. The relationship between the calibration curves and the ultimate sensitivity of calibrated SPIRE FTS data is discussed and the results from the derivation methods are compared. These comparisons show that the latest derivation methods result in calibration curves that impart a factor of between 2 and 100 less noise to the overall error budget, which results in calibrated spectra for individual observations whose noise is reduced by a factor of 2–3, with a gain in the overall spectral sensitivity of 23 % and 21 % for the two detector bands, respectively.

Item Type:Article
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URLURL TypeDescription Paper ReadCube access
Lu, Nanyao0000-0002-8948-1044
Valtchanov, Ivan0000-0001-9930-7886
Additional Information:© 2014 Springer Science+BusinessMedia Dordrecht. Received: 5 July 2013; Accepted: 7 November 2013; Published online: 21 January 2014. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia with important participation from NASA. 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).
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:SPIRE; FTS · Spectroscopy; Calibration; Sensitivity
Issue or Number:2
Record Number:CaltechAUTHORS:20140829-133629210
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Official Citation:Fulton, T., Hopwood, R., Baluteau, JP. et al. Exp Astron (2014) 37: 381. doi:10.1007/s10686-013-9364-z
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:49074
Deposited By: Jason Perez
Deposited On:29 Aug 2014 21:49
Last Modified:10 Nov 2021 18:39

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