J/ApJS/171/61 All-Sky Survey of Flat-Spectrum Radio Sources (Healey+, 2007)
CRATES: an all-sky survey of flat-spectrum radio sources.
Healey S.E., Romani R.W., Taylor G.B., Sadler E.M., Ricci R., Murphy T.,
Ulvestad J.S., Winn J.N.
<Astrophys. J. Suppl. Ser., 171, 61-71 (2007)>
=2007ApJS..171...61H 2007ApJS..171...61H
ADC_Keywords: Radio sources ; Surveys ; Active gal. nuclei ; QSOs
Keywords: galaxies: active - quasars: general - surveys
Abstract:
We have assembled an 8.4GHz survey of bright, flat-spectrum
(α>-0.5) radio sources with nearly uniform extragalactic
(|b|>10°) coverage for sources brighter than S4.8GHz=65mJy.
The catalog is assembled from existing observations (especially CLASS
and the Wright et al., Cat VIII/38, PMN-CA survey), augmented by
reprocessing of archival VLA and ATCA data and by new observations
to fill in coverage gaps. We refer to this program as CRATES, the
Combined Radio All-Sky Targeted Eight GHz Survey. The resulting
catalog provides precise positions, subarcsecond structures, and
spectral indices for some 11000 sources. We describe the morphology
and spectral index distribution of the sample and comment on the
survey's power to select several classes of interesting sources,
especially high-energy blazars. Comparison of CRATES with other
high-frequency surveys also provides unique opportunities for
identification of high-power radio sources.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 102 14467 The CRATES catalog
table6.dat 102 113 Results of additional observations
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See also:
VIII/38 : The Parkes-MIT-NRAO 4.85GHz (PMN) Surveys (Griffith+ 1993-1996)
J/A+AS/106/29 : 327MHz flat-spectrum radio sources (Ghosh+ 1994)
J/AZh/77/407 : 0.97-21.7GHz flat-spectrum radio source (Gorshkov+, 2000)
J/MNRAS/323/757 : Deep X-Ray Radio Blazar Survey (DXRBS). II. (Landt+, 2001)
J/MNRAS/368/1411 : Flat-spectrum symmetric radio sources (Augusto+, 2006)
J/MNRAS/376/371 : Polarisation of flat-spectrum radio sources (Jackson+, 2007)
J/MNRAS/377/430 : Jodrell Bank Flat-spectrum radio sample (Mckean+, 2007)
J/AZh/85/314 : Flat-spectrum radio sources complete sample (Gorshkov+ 2008)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- CRATES The 4.8GHz coordinate name, JHHMMSS+DDMMSS (1)
16- 20 I5 mJy S4.8 The 4.8GHz flux density (1)
22- 27 F6.3 --- alpha Spectral index between low frequency and 4.8GHz
29- 30 I2 h RAh ? 8.4GHz Right Ascension (J2000)
32- 33 I2 min RAm ? 8.4GHz Right Ascension (J2000)
35- 39 F5.2 s RAs ? 8.4GHz Right Ascension (J2000)
41 A1 --- DE- 8.4GHz Declination sign (J2000)
42- 43 I2 deg DEd ? 8.4GHz Declination (J2000)
45- 46 I2 arcmin DEm ? 8.4GHz Declination (J2000)
48- 51 F4.1 arcsec DEs ? 8.4GHz Declination (J2000)
53 A1 --- r_S8.4 [VAX] Origin of 8.4GHz position (2)
55- 61 F7.1 mJy S8.4 ? The 8.4GHz flux density
63- 64 I2 h RA2h ? NVSS or SUMSS Right Ascension (J2000) (3)
66- 67 I2 min RA2m ? NVSS or SUMSS Right Ascension (J2000) (3)
69- 73 F5.2 s RA2s ? NVSS or SUMSS Right Ascension (J2000) (3)
75 A1 --- DE2- NVSS or SUMSS Declination sign (J2000) (3)
76- 77 I2 deg DE2d ? NVSS or SUMSS Declination (J2000) (3)
79- 80 I2 arcmin DE2m ? NVSS or SUMSS Declination (J2000) (3)
82- 85 F4.1 arcsec DE2s ? NVSS or SUMSS Declination (J2000) (3)
87- 93 F7.1 mJy Slow ? The low frequency flux density (3)
95-100 F6.3 --- alpha1 ? Spectral index between low frequency / 8.4GHz
102 A1 --- Morph Morphology class (G1)
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Note (1): From Kuhr et al., 1981AJ.....86..854K 1981AJ.....86..854K (S5), Gregory et al. 1996,
Cat. VIII/40 (GB6), or Wright et al. 1997, Cat. VIII/38 (PMN).
Note (2): References are abbreviated as follows:
V = VLA
A = ATCA
X = VLA Program AP0282; see text
Note (3): From Condon et al. 1998, Cat. VIII/65 (NVSS) or
Bock et al. 1999AJ....117.1578B 1999AJ....117.1578B &
Mauch et al. 2003, Cat. VIII/70 (SUMSS).
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- CRATES The 1.4GHz coordinate name, JHHMMSS+DDMMSS (1)
16- 20 I5 mJy SNVSS The 1.4GHz flux density (1)
22- 27 F6.3 --- alpha Spectral index between WENSS (330MHz)
or Texas Survey (365MHz) and 1.4GHz
29- 30 I2 h RAh ? 8.4GHz Right Ascension (J2000)
32- 33 I2 min RAm ? 8.4GHz Right Ascension (J2000)
35- 39 F5.2 s RAs ? 8.4GHz Right Ascension (J2000)
41 A1 --- DE- 8.4GHz Declination sign (J2000)
42- 43 I2 deg DEd ? 8.4GHz Declination (J2000)
45- 46 I2 arcmin DEm ? 8.4GHz Declination (J2000)
48- 51 F4.1 arcsec DEs ? 8.4GHz Declination (J2000)
53 A1 --- r1 Origin of the low frequency data (3)
55- 61 F7.1 mJy S8.4 ? The 8.4GHz flux density
63- 64 I2 h RA1h ? NVSS Right Ascension (J2000) (1)
66- 67 I2 min RA1m ? NVSS Right Ascension (J2000) (1)
69- 73 F5.2 s RA1s ? NVSS Right Ascension (J2000) (1)
75 A1 --- DE1- NVSS Declination sign (J2000) (1)
76- 77 I2 deg DE1d ? NVSS Declination (J2000) (1)
79- 80 I2 arcmin DE1m ? NVSS Declination (J2000) (1)
82- 85 F4.1 arcsec DE1s ? NVSS Declination (J2000) (1)
87- 93 F7.1 mJy S1.4 ? The 1.4GHz flux density (1)
95-100 F6.3 --- alpha1 ? Spectral index between 1.4 and 8.4GHz
102 A1 --- Morph Morphology class (G1)
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Note (1): From Condon et al. 1998, Cat. VIII/65 (NVSS).
Note (3): Reference as follows:
W = Rengelink et al. 1997, Cat. J/A+AS/124/259 (WENSS);
T = Douglas et al. 1996, Cat. VIII/42 (Texas Survey).
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Global Notes:
Note (G1): Morphology class abbreviated as follows:
N = No detection
P = point source
S = short jet
L = long jet
D = double source
C = complex morphology (see text for full description)
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 15-Apr-2009