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Study of Deep IRAS Fields at 60 µm

Gregorich, D. T. and Neugebauer, G. and Soifer, B. T. and Gunn, J. E. and Herter, T. L. (1995) Study of Deep IRAS Fields at 60 µm. Astronomical Journal, 110 (1). pp. 259-267. ISSN 0004-6256. doi:10.1086/117515.

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A selected subset of IRAS pointed observations has been examined to study infrared galaxies at 60 /µm in the 50 to 100 mJy range. The observations cover a total area of 20 sq° and contain a total of 746 sources with signal to instrumental noise ratios SNR >5. Detailed observations of one of these fields at visual, near-infrared, radio and x-ray wavelengths indicate that these sources, the faintest extracted from the IRAS data, are dusty galaxies much like the bulk of infrared galaxies observed by IRAS. The area covered triples, in 20 different fields, the area of the previously most sensitive IRAS survey of sources in this flux density range. The number of sources is about seven times that previously extracted, and the source density is about twice that found in the previous study at this flux level. The observed 60 /µm source counts are consistent with an evolutionary model of the number of infrared luminous galaxies that fits the observed radio source counts; the counts are inconsistent with a nonevolutionary model.

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Herter, T. L.0000-0002-3856-8385
Alternate Title:Study of Deep IRAS Fields at 60 micron
Additional Information:© 1995 American Astronomical Society. Received 1995 January 25; revised 1995 March 14. We thank the staff at IPAC for its support in the processing of these data and the IRAS Operations team for incorporating a new mode of observing well into the IRAS mission. We also thank the staff at Palomar for helping to obtain the visual and near-infrared observations. We especially thank Keith Matthews for his help with the observations and Perry Hacking for his help in sorting out the processing. We thank Dave Helfand for communicating his results to us prior to their publication, Mike Hauser for helpful discussion and Lee Armus for reading the manuscript. This work has been supported by grants from the NASA ADP program and from the National Science Foundation. We also thank Ms. Lydia H. Suarez for her help in preparing the manuscript.
Group:Infrared Processing and Analysis Center (IPAC)
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Issue or Number:1
Record Number:CaltechAUTHORS:20170213-110830133
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:74238
Deposited By: Ruth Sustaita
Deposited On:13 Feb 2017 20:48
Last Modified:11 Nov 2021 05:25

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