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FIRBACK: III. Catalog, source counts, and cosmological implications of the 170μm ISO deep survey

Dole, H. and Gispert, R. and Lagache, G. and Puget, J.-L. and Bouchet, F. R. and Cesarsky, C. and Ciliegi, P. and Clements, D. L. and Dennefeld, M. and Désert, F.-X. and Elbaz, D. and Franceschini, A. and Guiderdoni, B. and Harwit, M. and Lemke, D. and Moorwood, A. F. M. and Oliver, S. and Reach, W. T. and Rowan-Robinson, M. and Stickel, M. (2001) FIRBACK: III. Catalog, source counts, and cosmological implications of the 170μm ISO deep survey. Astronomy & Astrophysics, 372 (2). pp. 364-376. ISSN 0004-6361. doi:10.1051/0004-6361:20010449.

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The FIRBACK (Far Infrared BACKground) survey is one of the deepest imaging surveys carried out at 170 μm with ISOPHOT onboard ISO, and is aimed at the study of the structure of the Cosmic Far Infrared Background. This paper provides the analysis of resolved sources. After a validated process of data reduction and calibration, we perform intensive simulations to optimize the source extraction, measure the confusion noise (σ_c = 45 mJy), and give the photometric and astrometric accuracies. 196 galaxies with flux S > 3σ_c are detected in the area of 3.89 square degrees. Counts of sources with flux S > 4σ_c present a steep slope of 3.3 ± 0.6 on a differential "log N-log S"plot between 180 and 500 mJy. As a consequence, the confusion level is high and will impact dramatically on future IR deep surveys. This strong evolution, compared with a slope of 2.5 from Euclidian geometry, is in line with models implying a strongly evolving Luminous Infrared Galaxy population. The resolved sources account for less than 10% of the Cosmic Infrared Background at 170 μm, which is expected to be resolved into sources in the 1 to 10 mJy range.

Item Type:Article
Related URLs:
URLURL TypeDescription
Clements, D. L.0000-0002-9548-5033
Elbaz, D.0000-0002-7631-647X
Oliver, S.0000-0001-7862-1032
Reach, W. T.0000-0001-8362-4094
Additional Information:© 2001 ESO. Received: 23 January 2001. Accepted: 5 March 2001. HD, GL & JLP appreciate discussions with Rene Laureijs and Carlos Gabriel at Vilspa and Ulrich Klaas at Heidelberg. We also are greatful to Alain Abergel, Alain Coulais & Marc-Antoine Miville-Deschênes at IAS, for stimulating and helpful discussions through the analysis of the FIRBACKdata. Thanks also go to Martin Kessler and his team who did a great job in planning ISO observations so efficiently. MH acknowledges support of his participation on ISO through NASA grants and contracts. DE acknowledges support from NASA grant NAG5-8218.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Subject Keywords:cosmology: miscellaneous - galaxies: infrared - galaxies: evolution - galaxies: statistics
Issue or Number:2
Record Number:CaltechAUTHORS:20180223-115733145
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Official Citation:FIRBACK: III. Catalog, source counts, and cosmological implications of the 170 μm ISO deep survey H. Dole, R. Gispert, G. Lagache, J.-L. Puget, F. R. Bouchet, C. Cesarsky, P. Ciliegi, D. L. Clements, M. Dennefeld, F.-X. Désert, D. Elbaz, A. Franceschini, B. Guiderdoni, M. Harwit, D. Lemke, A. F. M. Moorwood, S. Oliver, W. T. Reach, M. Rowan-Robinson and M. Stickel A&A, 372 2 (2001) 364-376 DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:84940
Deposited By: Ruth Sustaita
Deposited On:24 Feb 2018 00:21
Last Modified:15 Nov 2021 20:24

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