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Microjansky Sources at 1.4 GH[CLC]z[/CLC]
Author(s) -
Andrew Hopkins,
J. Afonso,
L. E. Cram,
Bahram Mobasher
Publication year - 1999
Publication title -
the astrophysical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.376
H-Index - 489
eISSN - 1538-4357
pISSN - 0004-637X
DOI - 10.1086/312087
Subject(s) - physics , astrophysics , galaxy , telescope , population , flux (metallurgy) , field (mathematics) , limit (mathematics) , enhanced data rates for gsm evolution , astronomy , telecommunications , computer science , demography , materials science , sociology , metallurgy , mathematical analysis , mathematics , pure mathematics
We present a deep 1.4 GHz survey made with the Australia Telescope CompactArray (ATCA), having a background RMS of 9 microJy near the image phase centre,up to 25 microJy at the edge of a 50' field of view. Over 770 radio sourcesbrighter than 45 microJy have been catalogued in the field. The differentialsource counts in the deep field provide tentative support for the growingevidence that the microjansky radio population exhibits significantly higherclustering than found at higher flux density cutoffs. The opticalidentification rate on CCD images is approximately 50% to R=22.5, and theoptical counterparts of the faintest radio sources appear to be mainly singlegalaxies close to this optical magnitude limit.Comment: 6 pages, 4 figures, accepted by ApJ Letters 4 May 199

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