First detections of FIRBACK sources with SCUBA

Details First detections of FIRBACK sources with SCUBA First detections of FIRBACK sources with SCUBA

1999-10-22

arxiv.org/abs/astro-ph/9910428v2

Astronomy and Astrophysics

Astrophysics

4 pages, including 1 figure, uses aa.cls, to appear in Astronomy & Astrophysics Letters, slight changes to some numbers and to

Scientific paper

The FIRBACK (Far InfraRed BACKground) survey represents the deepest extensive 170 micron images obtained by the ISO satellite. The sources detected comprise about 10% of the Cosmic IR Background (CIB) seen by COBE, and, importantly, were observed at a wavelength near the peak of the CIB. Detailed follow-up of these sources should help pin down the redshifts, Hubble types, and other properties of the galaxies which constitute this background. We have used the Submillimetre Common-User Bolometer Array (SCUBA) instrument on the James Clerk Maxwell Telescope (JCMT) to search for sub-mm emission from a sample of 10 galaxies which are bright at 170 microns and for which we had accurate radio positions. Statistically we detect this sample at both 450 microns (~4 sigma) and 850 microns (~ 7 sigma); individual objects are convincingly detected in four cases at 850 microns, and one case at 450 microns. Fits to simple spectral energy distributions suggest a range of low to moderate redshifts, perhaps z=0 to 1.5 for this FIRBACK sub-sample.

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