J/ApJ/635/950 Radio sources at 8.5GHz (Henkel+, 2005)
Completing the counts of radio sources at 8.5GHz.
Henkel B., Partridge R.B.
<Astrophys. J., 635, 950-958 (2005)>
=2005ApJ...635..950H 2005ApJ...635..950H
ADC_Keywords: Galaxies, radio
Keywords: cosmology: observations - radio continuum: galaxies
Abstract:
Most currently available counts of radio sources at frequencies >5GHz
are restricted to relatively bright sources. Observations made at
NRAO's VLA have, however, provided counts of very faint sources
(S≲1mJy) at 8.5GHz. Here we extend the 8.5GHz VLA source counts to
higher flux densities using both archival data and a brief, blind VLA
survey at 8.5GHz.
Description:
We arranged to make shallow, wide-area surveys of two regions of the
sky at 8.5GHz. These two surveys were inserted during bad weather in
the midst of another VLA observing program carried out in the spring
of 2003, with the VLA in its D configuration.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 63 47 Sources at 8.5GHz
table3.dat 45 31 Spectral indices for shallow survey sources
notes.dat 80 11 Individual notes
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See also:
VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
VIII/71 : The FIRST Survey Catalog, Version 03Apr11 (Becker+ 2003)
J/AJ/126/2237 : Radio-excess IR galaxies PMN/FSC sample selection
(Drake+, 2003)
J/AJ/123/2402 : The microJansky sky at 8.4GHz (Fomalont+, 2002)
J/ApJ/533/611 : 1.4GHz survey in HDF region (Richards+, 2000)
J/ApJ/405/498 : Counts and spectral indices at 8.44GHz (Windhorst+, 1993)
Table 1: Archival Data at 8.5GHz
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Origin Target sources Number of Average rms VLA config.
serendipitous noise
sources (µJy/beam)
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Drake Galactic stars 7 ∼30 Various
Frail Gamma-ray bursts 7 ∼5 C
Guerra GPS sources 2 ∼500 D or C/D
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- [HP2005] Source identification
3 A1 --- f_[HP2005] Flag on [HP2005] (1)
4 A1 --- n_[HP2005] [*] Indicates a note detailed in notes.dat
5- 15 A11 --- Origin Origin (2)
17- 18 I2 h RAh Hour of Right Ascension (J2000.0)
20- 21 I2 min RAm Minute of Right Ascension (J2000.0)
23- 27 F5.2 s RAs Second of Right Ascension (J2000.0)
29 A1 --- DE- Sign of the Declination (J2000.0)
30- 31 I2 deg DEd Degree of Declination (J2000.0)
33- 34 I2 arcmin DEm Arcminute of Declination (J2000.0)
36- 39 F4.1 arcsec DEs Arcsecond of Declination (J2000.0)
41- 47 F7.4 mJy Scorr Corrected flux
49- 54 F6.4 mJy e_Scorr Error in Scorr
56- 63 A8 sr EffArea Effective area (3)
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Note (1): Flag on [HP2005], defined as follows:
b = Sources detected below 5σ at 8.5GHz, in particularly noisy images.
c = Sources detected above 5σ at 8.5GHz and found in the FIRST
catalog (Cat. VIII/71), but with no obvious 4.8GHz counterpart.
Note (2): Archival sources are identified by the name of the author who
originally made the observations (See Table 1 above).
Blind survey sources are identified by the date observed.
Note (3): Area in which the source could have been detected above the 5σ
(or other) threshold in the relevant image.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- [HP2005] Source identification
3 A1 --- f_[HP2005] [b] Indicates notes detailed in notes.dat
5- 9 F5.2 mJy S8.5GHz Flux at 8.5GHz
11- 14 F4.2 mJy e_S8.5GHz ? Error in S8.5GHz
16- 20 F5.2 mJy S4.8GHz ? Flux at 4.8GHz
22- 25 F4.2 mJy e_S4.8GHz ? Error in S4.8GHz
27- 31 F5.2 --- Sp-Index ? Spectral index α (8.5-4.8GHz)
33- 38 F6.2 mJy S1.4GHz ? Flux at 1.4GHz
39 A1 --- f_S1.4GHz [c] Flag on S1.4GHz (1)
41- 45 F5.2 --- Sp-Index2 ? Spectral index α (4.8-1.4GHz)
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Note (1): A "c" indicates fluxes from NVSS (Cat. VIII/65). All other
1.4GHz fluxes are from FIRST (Cat. VIII/71).
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- [HP2005] Source identification
4- 80 A77 --- Note Notes
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History:
From electronic version of the journal
(End) Marianne Brouty [CDS] 06-Sep-2006