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J/ApJS/107/19 MRC/1Jy Radio source survey. I. (McCarthy+ 1996)
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The Molonglo Reference Catalog/1 Jansky radio source survey.
I. Radio galaxy identifications.
McCarthy P.J., Kapahi V.K., Van Breugel W., Persson S.E., Athreya R.,
Subrahmanya C.R.
<Astrophys. J. Suppl. Ser. 107, 19 (1996)>
=1996ApJS..107...19M (SIMBAD/NED BibCode)
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ADC_Keywords: Galaxies, radio ; Redshifts ; Magnitudes
Keywords: galaxies: photometry - quasars: general - radio continuum: galaxies -
surveys
Abstract:
This is the first in a series of papers discussing the properties of a
complete set of radio sources selected near S408=1Jy. We present
optical or infrared identifications for a sample of 452 radio
galaxies. The sources were selected from the 408MHz Molonglo Reference
Catalog, restricted only by flux density and position on the sky, as
follows: S408>0.95Jy and -30<decl.(1950)<-20, and
9h20m<R.A.(1950)<14h4m or 20h20m<R.A.(1950)<6h14m. This complete
sample, the MRC/1 Jy survey, contains 558 radio galaxies or quasars,
of which six are occulted by bright stars or galaxies and two are
multiple confused sources. Of the remaining 550 sources, 527, or 96%,
are identified to an r magnitude of 25, and eight additional sources
are identified to K=19. Of the 17 unocculted objects that remain
unidentified, 15 are sources for which we have either poor radio maps
or inadequate optical/IR images. This paper presents finding charts
and astrometric positions for the 452 sources that are not identified
as either quasars or BL Lacertae objects. Magnitudes in the r passband
accurate to typically 0.1mag are given for 353 of the radio galaxy
identifications. Redshifts for 268 of the galaxies are also listed;
these have been derived from 450 spectroscopic observations. The radio
observations, quasar and BL Lac identifications, spectroscopy, and
near-IR images will be presented in subsequent papers in this series.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 93 463 Optical positions of MRC/1 Jy radio galaxies
notes.dat 72 366 Notes of table2
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See also:
VIII/16 : Molonglo Reference Catalogue of Radio Sources (Large+ 1991)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- MRC Designation as in MRC <VIII/16> (1)
9 A1 --- m_MRC [ABC] Radio Multiplicity as in MRC (1)
10 A1 --- n_MRC [abc] Optical Multiplicity (1)
11- 12 I2 h RAh Right ascension (1950) (1)
14- 15 I2 min RAm Right ascension (1950)
17- 21 F5.2 s RAs Right ascension (1950)
23 A1 --- DE- Declination sign
24- 25 I2 deg DEd Declination (1950) (1)
27- 28 I2 arcmin DEm Declination (1950)
30- 33 F4.1 arcsec DEs Declination (1950)
34 A1 --- RadioPos [R] 'R' indicates a radio position (1)
35- 40 F6.4 --- z ? Redshift
41 A1 --- u_z Uncertainty flag on z
43 A1 --- l_rmag Limit flag on rmag
44- 48 F5.2 mag rmag ? r magnitude (2)
49 A1 --- u_rmag Uncertainty flag on rmag
51- 52 A2 --- Filt Filter
54 I1 --- FOV ? Field of view codes (4)
56- 60 A5 --- Run Run numbers (3)
62 A1 --- Note [N] Note detailed in file notes.dat
64- 93 A30 --- Rem Remark
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Note (1): For sources noted as "Unidentified" we list the radio
position as derived from either our VLA images or from the MRC when
observations are not available. Positions listed to the nearest
arcsecond of declination are all radio positions are are flagged 'R'
in byte 34.
The n_MRC suffix were assigned lower-case letters (a, b, c) in byte
10 for those MRC names which had no suffix in the original MRC.
Note (2): All of the magnitudes listed are measured in a 4" diameter
aperture in the Thuan-Gunn r- band, even when the image shown in Fig.1
is in a different pass-band.
Note (3): The run numbers denoted by asterisks are IR imaging runs
that will be described elsewhere.
Note (4): Field of view (FOV) codes are as follow:
1 = 66"x66"(2.5m+TI), 2 = 87"x 87"(m+TI), 3 = 71"x71"(2.5m+IR),
4 = 170"x 170"(Sky Survey), 5 = 59"x 59"(2.5m+Tek No.1),
6 = 51"x 51"(2.5m+Tek No.2),7 = other.
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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- 8 A8 --- MRC MRC designation as in file table2.dat
9- 11 A3 --- m_MRC Multiplicity index on MRC
12- 72 A61 --- Text Text of the note
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History: Prepared via OCR at CDS (August 1997)
Acknowledgements:
We thank H. Andernach <heinz@astro.ugto.mx> for proofreading the
table, and supplying the remarks in columns m_MRC and RadioPos
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(End) James Marcout, Patricia Bauer [CDS] 28-Jan-1998