J/ApJS/150/417 Deep, high-resolution survey at 74MHz (Cohen+, 2004)
A deep, high-resolution survey at 74 MHz.
Cohen A.S., Rottgering H.J.A., Jarvis M.J., Kassim N.E., Lazio T.J.W.
<Astrophys. J. Suppl. Ser., 150, 417-430 (2004)>
=2004ApJS..150..417C 2004ApJS..150..417C
ADC_Keywords: Surveys ; Radio sources
Keywords: radio continuum: general - surveys
Abstract:
We present a 74MHz survey of a 165deg2 region located near the north
Galactic pole. This survey has an unprecedented combination of both
resolution (25" FWHM) and sensitivity (σ as low as 24mJy/beam).
We detect 949 sources at the 5σ level in this region, enough to
begin exploring the nature of the 74MHz source population. We present
differential source counts, spectral index measurements, and the size
distribution as determined from counterparts in the high-resolution
FIRST 1.4GHz survey, Cat. VIII/71.
Description:
The data used to produce this survey come from observations taken on
1998 March 7 intended to map two normal galaxies at 74MHz (NGC 4565
and NGC 4631).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 50 949 Complete Source List
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See also:
VIII/71 : The FIRST Survey Catalog, Version 03Apr11 (Becker+ 2003)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name Source name
14- 15 I2 h RAh Hour of Right Ascension (J2000)
17- 18 I2 min RAm Minute of Right Ascension (J2000)
20- 24 F5.2 s RAs Second of Right Ascension (J2000)
26 A1 --- DE- Sign of the Declination (J2000)
27- 28 I2 deg DEd Degree of Declination (J2000)
30- 31 I2 arcmin DEm Arcminute of Declination (J2000)
33- 36 F4.1 arcsec DEs Arcsecond of Declination (J2000)
38- 43 F6.3 Jy S74MHz Integrated 74MHz flux density
45- 49 A5 --- Sp+Index Spectral index between 74 and 1400MHz
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 13-Feb-2004