J/AJ/130/923 Faint radio sources in the NOAO Bootes field (Wrobel+, 2005)
Faint radio sources in the NOAO Bootes field: VLBA imaging and optical
identifications.
Wrobel J.M., Taylor G.B., Rector T.A., Myers S.T., Fassnacht C.D.
<Astron. J., 130, 923-935 (2005)>
=2005AJ....130..923W 2005AJ....130..923W (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Galaxies, radio
Keywords: astrometry - galaxies: active - radio continuum: galaxies - surveys
Abstract:
As a step toward investigating the parsec-scale properties of faint
extragalactic radio sources, the Very Long Baseline Array (VLBA) was
used at 5.0GHz to obtain phase-referenced images of 76 sources in the
NOAO Bootes field. These 76 sources were selected from the Faint
Images of the Radio Sky at Twenty cm (FIRST) catalog to have peak flux
densities above 10mJy at 5" resolution and deconvolved major diameters
of less than 3" at 1.4GHz. Of these faint radio sources, 57 were
identified with accretion-powered radio galaxies and quasars brighter
than 25.5mag in the optical I band. On Very Large Array (VLA) scales
at 1.4GHz, a measure of the compactness of the faint sources (the
ratio of the peak flux density from FIRST to the integrated flux
density from the NRAO VLA Sky Survey catalog) spans the full range of
possibilities arising from source-resolution effects.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 97 84 Faint sources with deconvolved major diameters
less than 3" in FIRST
notes.dat 80 236 Notes on individual sources
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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)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 21 A21 --- FIRST The FIRST (Cat. VIII/71) name
(JHHMMSS.sss+DDMMSS.ss)
23- 28 F6.2 mJy Sp1.4GHz FIRST (Cat. VIII/71) 1.4GHz peak flux
density (1)
30- 35 F6.3 mJy e_Sp1.4GHz Uncertainty in Sp1.4GHz (1)
37- 41 F5.1 mJy Si1.4GHz NVSS (Cat. VIII/65) 1.4GHz integrated flux
density
43- 45 F3.1 mJy e_Si1.4GHz Uncertainty in Si1.4GHz
47 A1 --- Status [iu] Identification status (2)
49- 50 A2 --- Seg VLBA observing segment
52- 55 F4.2 mJy sigma VLBA 5.0GHz search image σ (1)
57- 58 I2 h RAh ? Hour of right ascension (J2000) (3)
60- 61 I2 min RAm ? Minute of right ascension (J2000) (3)
63- 69 F7.4 s RAs ? Second of right ascension (J2000) (3)
71 A1 --- DE- Sign of the declination (J2000) (3)
72- 73 I2 deg DEd ? Degree of declination (J2000) (3)
75- 76 I2 arcmin DEm ? Arcminute of declination (J2000) (3)
78- 83 F6.3 arcsec DEs ? Arcsecond of declination (J2000) (3)
85 A1 --- l_Si5GHz Limit flag on Si5GHz
86- 89 F4.1 mJy Si5GHz VLBA 5.0GHz integrated flux density
91- 93 F3.1 mJy e_Si5GHz ? Uncertainty in Si5GHz
95 A1 --- f_Si5GHz [c] Flag on Si5GHz (4)
97 A1 --- Note [*] Note detailed in file notes.dat
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Note (1): In units of mJy/beam.
Note (2): Identification status in the I band from Jannuzi et al. (2005,
submitted), defined as follows:
i = identified with a galaxy or quasar.
u = unidentified.
Note (3): From VLBA 5.0GHz cleaned image.
Note (4): A "c" indicates a peak flux density in mJy/beam at 2mas resolution
after correction for coherence losses. Upper limits are 6σ.
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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- 21 A21 --- FIRST The FIRST (Cat. VIII/71) name
(JHHMMSS.sss+DDMMSS.ss)
23- 80 A58 --- Note Note
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 27-Oct-2005