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J/AJ/136/1889     20cm observations of deep Swire Field            (Owen+, 2008)

The Deep Swire Field. I. 20cm continuum radio observations: a crowded sky. Owen F.N., Morrison G.E. <Astron. J. 136, 1889-1900 (2008)> =2008AJ....136.1889O (SIMBAD/NED BibCode)
ADC_Keywords: Radio sources ; Surveys Keywords: cosmology: observations - galaxies: evolution - galaxies: starburst infrared: galaxies Abstract: We present results from deep radio observations taken with the Very Large Array at a center frequency of 1400MHz covering a region of the Spitzer Wide-area InfraRed Extragalactic Survey of the Spitzer Legacy survey, centered at 10:46:00, +59:01:00 (J2000). The reduction and cataloging of radio sources are described. An electronic catalog of the sources detected above 5σ is also presented. The survey presented is the deepest so far in terms of the radio source density on the sky. Perhaps surprisingly, the sources down to the bottom of the catalog appear to have median angular sizes still greater than 1-arcsec, like their cousins 10-100 times stronger. The shape of the differential logN-logS counts also seems to require a correction for the finite sizes of the sources to be self-consistent. If the logN-logS normalization remains constant at the lowest flux densities, there are about six sources per square arcminute at 15uJy at 20cm. Given the finite-source size this implies that we may reach the natural confusion limit near 1uJy. Description: Observations were made with the VLA in A, B, C, and D configurations for a total of almost 140hr on-source between 2001 December and 2004 January. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 85 2056 Radio source catalog
See also: J/AJ/137/4846 : The deep SWIRE field II. (Owen+, 2009) J/ApJS/182/625 : The deep SWIRE field III. (Owen+, 2009) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 5 I5 --- [OM2008] Catalog Source Number 7- 8 I2 h RAh Hour of Right Ascension (J2000) 10- 11 I2 min RAm Minutes of Right Ascension (J2000) 13- 17 F5.2 s RAs Seconds of Right Ascension (J2000) 20- 23 F4.2 s e_RAs Error in RAs 25 A1 --- DE- Sign of Declination (J2000) 26- 27 I2 deg DEd Degrees of Declination (J2000) 29- 30 I2 arcmin DEm Arcminute of Declination (J2000) 32- 35 F4.1 arcsec DEs Arcsecond of Declination (J2000) 38- 40 F3.1 arcsec e_DEs Error in DEs 43- 48 F6.1 uJy Speak Observed peak brightness at 1400MHz (1) 50- 56 F7.1 uJy Stot Total Flux Density at 1400 MHz 58- 63 F6.1 uJy e_Stot Error in Stot 65- 70 F6.1 --- S/N Peak Signal/Noise ratio 72 A1 --- l_bmaj [< ] Limit flag for size 73- 77 F5.1 arcsec bmaj Fitted Gaussian major axis FWHM (2) 79- 81 F3.1 arcsec bmin ? Fitted Gaussian minor axis FWHM 83- 85 I3 deg PA ? Fitted position angle
Note (1): In units of microJanskys/beam and uncorrected for primary beam or bandwidth smearing. Note (2): Or maximum size for very resolved sources.
History: From electronic version of the journal References: Owen F.N.+, Paper II. 2009AJ....137.4846O, Cat. J/AJ/137/4846 Owen F.N.+, Paper III. 2009ApJS..182..625O, Cat. J/AJ/182/625
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 18-Jan-2010
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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