Computer Science
Scientific paper
Jul 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001esasp.460...37g&link_type=abstract
The Promise of the Herschel Space Observatory. Eds. G.L. Pilbratt, J. Cernicharo, A.M. Heras, T. Prusti, & R. Harris. ESA-SP 460
Computer Science
10
Herschel, Submillimetre, Instrumentation
Scientific paper
SPIRE, the Spectral and Photometric Imaging Receiver, will be a bolometer instrument for ESA's Herschel satellite. Its main scientific goals are deep extragalactic and galactic imaging surveys and spectroscopy of star-forming regions in own and nearby galaxies. The SPIRE detectors are feedhorn-coupled NTD ``spider-web'' bolometers. The instrument comprises a three-band imaging photometer covering the 250-500 micron range, and an imaging Fourier Transform Spectrometer (FTS) covering 200-670 microns. The photometer has a field of view of 4 x 8 arcminutes which is observed simultaneously at 250, 350 and 500 microns, with dichroic beam dividers separating the three spectral bands. Its angular resolution is determined by the telescope diffraction limit, with FWHM beam widths of approximately 17, 24 and 35 arcseconds at 250, 350 and 500 microns, respectively. An internal beam steering mirror can be used for spatial modulation of the telescope beam, and observations can also be made by scanning the telescope without chopping, providing better sensitivity for source confusion-limited deep surveys. The FTS has a field of view of 2.6 arcminutes and an adjustable spectral resolution of 0.04 - 2 cm-1 (λ/Δλ = 20 - 1000 at 250 microns). It employs a dual-beam configuration with novel broad-band intensity beam dividers to provide high efficiency and separated output and input ports.
Griffin Matt J.
Swinyard Bruce M.
Vigroux Laurant
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