Swinyard, B. M. and Levenson, L. and Lu, N. and Schulz, B. and Schwartz, A. and Shupe, D. and Xu, C. K. and Zhang, L. (2010) In-flight calibration of the Herschel-SPIRE instrument. Astronomy and Astrophysics, 518 . L4. ISSN 0004-6361 http://resolver.caltech.edu/CaltechAUTHORS:20101124-111407085
- Published Version
See Usage Policy.
Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20101124-111407085
SPIRE, the Spectral and Photometric Imaging REceiver, is the Herschel Space Observatory's submillimetre camera and spectrometer. It contains a three-band imaging photometer operating at 250, 350 and 500 μm, and an imaging Fourier-transform spectrometer (FTS) covering 194–671 μm (447-1550 GHz). In this paper we describe the initial approach taken to the absolute calibration of the SPIRE instrument using a combination of the emission from the Herschel telescope itself and the modelled continuum emission from solar system objects and other astronomical targets. We present the photometric, spectroscopic and spatial accuracy that is obtainable in data processed through the “standard” pipelines. The overall photometric accuracy at this stage of the mission is estimated as 15% for the photometer and between 15 and 50% for the spectrometer. However, there remain issues with the photometric accuracy of the spectra of low flux sources in the longest wavelength part of the SPIRE spectrometer band. The spectrometer wavelength accuracy is determined to be better than 1/10th of the line FWHM. The astrometric accuracy in SPIRE maps is found to be 2 arcsec when the latest calibration data are used. The photometric calibration of the SPIRE instrument is currently determined by a combination of uncertainties in the model spectra of the astronomical standards and the data processing methods employed for map and spectrum calibration. Improvements in processing techniques and a better understanding of the instrument performance will lead to the final calibration accuracy of SPIRE being determined only by uncertainties in the models of astronomical standards.
|Additional Information:||© 2010 ESO. Received 31 March 2010; Accepted 3 May 2010; Published online 16 July 2010. Herschel is an ESA space observatory with science instruments provided by European-led Principal Investigator consortia and with participation from NASA. SPIRE has been developed by a consortium of institutes led by Cardiff Univ. (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); 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).|
|Subject Keywords:||instrumentation: photometers; instrumentation: spectrographs; space vehicles: instruments|
|Official Citation:||In-flight calibration of the Herschel-SPIRE instrument B. M. Swinyard, P. Ade, J.-P. Baluteau, H. Aussel, M. J. Barlow, G. J. Bendo, D. Benielli, J. Bock, D. Brisbin, A. Conley, L. Conversi, A. Dowell, D. Dowell, M. Ferlet, T. Fulton, J. Glenn, A. Glauser, D. Griffin, M. Griffin, S. Guest, P. Imhof, K. Isaak, S. Jones, K. King, S. Leeks, L. Levenson, T. L. Lim, N. Lu, G. Makiwa, D. Naylor, H. Nguyen, S. Oliver, P. Panuzzo, A. Papageorgiou, C. Pearson, M. Pohlen, E. Polehampton, D. Pouliquen, D. Rigopoulou, S. Ronayette, H. Roussel, A. Rykala, G. Savini, B. Schulz, A. Schwartz, D. Shupe, B. Sibthorpe, S. Sidher, A. J. Smith, L. Spencer, M. Trichas, H. Triou, I. Valtchanov, R. Wesson, A. Woodcraft, C. K. Xu, M. Zemcov and L. Zhang A&A 518 L4 (2010) DOI: 10.1051/0004-6361/201014605|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Jason Perez|
|Deposited On:||29 Nov 2010 17:22|
|Last Modified:||26 Dec 2012 12:41|
Repository Staff Only: item control page