2010A&A...518L...4S


Query : 2010A&A...518L...4S

2010A&A...518L...4S - Astronomy and Astrophysics, volume 518, L4-4 (2010/7-2)

In-flight calibration of the Herschel-SPIRE instrument.

SWINYARD B.M., ADE P., BALUTEAU J.-P., AUSSEL H., BARLOW M.J., BENDO G.J., BENIELLI D., BOCK J., BRISBIN D., CONLEY A., CONVERSI L., DOWELL A., DOWELL D., FERLET M., FULTON T., GLENN J., GLAUSER A., GRIFFIN D., GRIFFIN M., GUEST S., IMHOF P., ISAAK K., JONES S., KING K., LEEKS S., LEVENSON L., LIM T.L., LU N., MAKIWA G., NAYLOR D., NGUYEN H., OLIVER S., PANUZZO P., PAPAGEORGIOU A., PEARSON C., POHLEN M., POLEHAMPTON E., POULIQUEN D., RIGOPOULOU D., RONAYETTE S., ROUSSEL H., RYKALA A., SAVINI G., SCHULZ B., SCHWARTZ A., SHUPE D., SIBTHORPE B., SIDHER S., SMITH A.J., SPENCER L., TRICHAS M., TRIOU H., VALTCHANOV I., WESSON R., WOODCRAFT A., XU C.K., ZEMCOV M. and ZHANG L.

Abstract (from CDS):

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 500µm, and an imaging Fourier-transform spectrometer (FTS) covering 194-671µm (447-1550GHz). 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.

Abstract Copyright:

Journal keyword(s): instrumentation: photometers - instrumentation: spectrographs - space vehicles: instruments

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 RAFGL 618 pA* 04 42 53.6242032600 +36 06 53.400902220   16.32   12.59   C-rich 984 0
2 NAME Orion Bright Bar reg 05 35 22.30 -05 24 33.0           ~ 805 0
3 NAME Sgr A Region reg 17 45 12 -28 48.3           ~ 934 0
4 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 2116 1
5 SH 2-106 HII 20 27 26.8 +37 22 49           ~ 426 2
6 GRS G081.70 +00.50 SFR 20 39 01.6 +42 19 38           O4.5 1005 0
7 NGC 7023 RNe 21 01 36.9 +68 09 48           ~ 667 0

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2022.08.10-07:22:31

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