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J/AZh/77/3 Studies of Bright Steep-Spectrum Radio Sources (Lipovka+, 2000)
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Large studies of bright steep-Spectrum radio sources.
Lipovka N.M., Lipovka A.A., Verkhodanov O.V., Chavira E.
<Astron. Zh. 77, 3 (2000)>
=2000AZh....77....3L (SIMBAD/NED BibCode)
=2000ARep...44....1L
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ADC_Keywords: Radio sources; Photometry, UBV
Abstract:
Results of studies of bright radio sources in the constellation Cetus
are presented. More than 50% of the sources have radio spectral
indices steeper than 0.9. Optical identifications have been determined
for 35 sources. A large fraction of the radio sources are identified
with weak blue galaxies. Given their spectral indices, it is likely
that these objects have redshift z=0.4-1.0. More than 20% of the
steep-spectrum sources do not have optical identifications and appear
to be weak galaxies with z>2.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table.dat 122 91 List of galaxies
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Byte-by-byte Description of file: table.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- Seq Running number [1-35]
5- 14 A10 --- Name Name of radio source
19- 20 I2 h RAh Right ascension (1950)
22- 23 I2 min RAm Right ascension (1950)
25- 30 F6.3 s RAs Right ascension (1950)
33- 37 F5.3 s e_RAs ? Standard deviation in RAs
41 A1 --- DE- Declination sign
42- 43 I2 deg DEd Declination (1950)
45- 46 I2 arcmin DEm Declination (1950)
48- 52 F5.2 arcsec DEs Declination (1950)
55- 58 F4.2 arcsec e_DEs ? Standard deviation in DEs
62- 65 I4 MHz Freq ? Observing frequency (1)
68- 73 F6.1 mJy Flux ? Flux density at Freq
76- 82 F7.3 mJy e_Flux ? Standard deviation in Flux
84 A1 --- l_alpha Limit flag on spectral index
85- 90 F6.3 --- alpha ? Spectral index between 365 and 1400 MHz
94 A1 --- l_mR ? Limit flag on mR
95- 99 F5.2 mag mR ? Stellar magnitude on red plates
103-107 F5.2 mag mB ? Stellar magnitude on blue plates
113-114 A2 --- Type ? Type of optical object (2)
118-119 A2 --- Refs References (2)
121-122 A2 --- EF [EF ] EF: empty field in ref [9] (3)
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Note (1): 365MHz, 408MHz or 1400 MHz
Note (2): Gb: blue galaxy; Gr: red galaxy; Q : quasar
Note (3): References:
9. Irwin, 1998, http://www.ast.cam.ac.uk/~mike/apmcat/
10. Condon et.al., 1996, The NRAO VLA Sky Survey, http://www.nrao.edu
Cat. <VIII/65>
11. Douglas et al., 1996, Cat. <VIII/42>
15. Large et al., 1981, Cat. <VIII/16>
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(End) Veta Avedisova [INASAN] 23-Aug-2000