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VIII/25 6C Survey of Radio Sources VI (6CSRSVI; Hales+ 1993)
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The 6C Survey of Radio Sources - VI. The Continuous Zone 30 deg < Dec < 51 deg,
00h < RA < 09h 05m and 22h 35m < RA < 24h
Hales S.E.G., Baldwin J.E., Warner P.J.
<Mon.Not.R.Astron.Soc., 263, 25 (1993)>
=1993MNRAS.263...25H
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ADC_Keywords: Radio sources; Surveys
Summary:
This catalog contains the sixth section of the 6C Cambridge survey of
radio sources at 151 MHz (6CVI). This part of the survey covers the
region 30 deg < Dec < 51 deg, 00h < RA < 09h 05m and 22h 35m < RA <
24h. The catalog data include the source positions (B1950), peak flux
density, integrated flux density, contour map panel number, contour map
field names, and an integrated flux flag. This catalog contains a list
of 6752 sources in 2440 square degrees.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This File
6csrsvi.dat 52 6752 Catalog Data
6csrsvi.tex 74 193 LaTeX ADC Documentation
adc.sty 68 38 ADC Style File
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Description:
The 6C Survey of Radio Sources - VI. The Continuous Zone 30 deg < Dec <
51 deg , 00h < RA < 09h 05m and 22h 35m < RA < 24h (6CVI) contains a
compilation of radio source observations made with the use of an
(non-tracking) Earth-rotation aperture synthesis telescope comprising
many small aerial arrays on an east-west baseline operating at 151 MHz.
This paper is the sixth in a series of papers giving radio source
observations at 151 MHz. See the discussion in 6CI (Baldwin et al.
1985) for details on the design and operation of the telescope and the
initial generation of the survey. Other papers in this series include
6CII (Hales et al. 1988), 6CIII (Hales et al. 1990), 6CIV (Hales et al.
1991), and 6CV (Hales et al. 1993a).
The 6CVI catalog contains a total listing of 6752 radio sources ordered
by increasing right ascension. The 6CVI covers the region 30 deg < Dec <
51 deg , 00h < RA < 09h 05m and 22h 35m < RA < 24h. This survey has
been divided into six fields with up to 32 panels per field. The 6CVI
has some overlap in right ascension with the 6CII catalog so that 199
sources have alternative entries in both catalogs. In addition, there
is some overlap with the 6CIII and 6CV papers in this series.
Positional calibration was effected as for 6CII except that a
separate constant right ascension correction was obtained for each
map as well as a separate declination correction varying linearly with
declination. The right ascension correction ranged from 0.18 sec to
0.79 sec, and the most severe declination correction reached -25".
Flux densities are on the scale of Roger et al. (1973). Provisional
flux densities were corrected for the measured receiver gain at a
declination of 41 deg as a function of right ascension. The final flux
densities were adjusted to be consistent with the radio sources in
other published radio source lists and were adjusted for consistency
with overlapping regions in the 6CIII, 6CV catalogs. See 6CVI for
additional flux calibration details and for source selection criteria.
Note that this ADC catalog contains only the radio source list and does
not include the radio maps. The radio source list is intended to be
used with the radio maps originally published on microfiche
in Hales, Baldwin, and Warner (1993).
Structure:
The File as a Whole
The 6C Survey of Radio Sources - VI. The Continuous Zone
30 deg < Dec < 51 deg, 00h < RA < 09h 05m and 22h 35m < RA < 24h
consists of a single fixed-block file consisting of 6752
52-byte records. Descriptions of some of the fields in the file are
given in the following section.
Byte-by-byte Description of file: 6csrsvi.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (B1950)
4- 5 I2 min RAm Right ascension (B1950)
7- 10 F4.1 s RAs Right ascension (B1950)
13- 14 I2 deg DEd Declination (B1950)
16- 17 I2 arcmin DEm Declination (B1950)
19- 20 I2 arcsec DEs Declination (B1950)
23- 27 F5.2 Jy PeakFlux *Flux density (peak)
30- 34 F5.2 Jy IntFlux *? Flux density (integrated)
37- 39 I3 --- map_num *Contour map panel number
42- 48 A7 --- field *Contour map field name
51 A1 --- n_IntFlux *Integrated_flux_flag
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Note on PeakFlux:
Flux density (peak): Source peak flux density at 151 MHz.
Note on IntFlux:
Flux density (integrated): Source integrated flux density at 151 MHz.
Integrated flux densities were derived for sources with apparent
flux densities above 1 Jy (2 Jy for the top panels of the
map 2340+41 to avoid severe runaway problems). See 6CVI for further
details on generation of the source list.
Note on map_num:
Contour map panel number: This column contains the name of the map
panel in which the source appears. The panel number and map field name
tell the user where to look up the source of interest in the published
contour map. Each map is divided into 32 panels. A panel number
listed with a negative sign indicates that the data are accommodated at
the location but come from another map or area of sky.
Note on field:
Contour map field names: This column contains the name of the
field in which the source appears. Six fields have been
included in this survey: 2340+41, 0120+41, 0300+41, 0440+41,
0620+41, and 0800+41. The panel number and map field name tell the
user where to look up the source of interest in the published contour
map.
Note on n_IntFlux:
Integrated flux flag: A dash (-) indicates that the peak flux was not
strong enough to calculate the integrated flux. An asterisk (*)
indicates that the peak flux was strong enough to qualify for
integration, but it has been integrated into a brighter adjoining peak.
History:
Remarks and Modification
The 6C Survey of Radio Sources - VI. The Continuous Zone 30 deg < Dec <
51 deg , 00h < RA < 09h 05m and 22h 35m < RA < 24h was received by the
Astronomical Data Center (ADC), NASA Goddard Space Flight Center, from
Dr. Heinz Andernach. The catalog was originally submitted by the
first author, Dr. Sally Hales.
The integrated flux flag column was generated by the ADC by editing the
original integrated flux field and moving the character flags to a
separate column. This was done to avoid the mixing of characters and
numbers in a single field.
References:
Baldwin, J. E., Boysen, R. C., Hales, S. E. G., Jennings, J. E.,
Waggett, P. C., Warner, P. J., and Wilson, D. M. A. 1985,
MNRAS, 217, 717 =1985MNRAS.217..717B
Hales, S. E. G., Baldwin, J. E., and Warner, P. J. 1988,
MNRAS, 234, 919 =1988MNRAS.234..919H
Hales, S. E. G., Masson, C. R., Warner, P. J., and Baldwin, J. E. 1990,
MNRAS, 246, 256 =1990MNRAS.246..256H
Hales, S. E. G., Mayer, C. J., Warner, P. J., and Baldwin, J. E. 1991,
MNRAS, 251, 46 =1991MNRAS.251...46H
Roger, R. S., Bridle, A. H., and Costain, C. H. 1973, AJ, 78, 1030
=1973AJ.....78.1030R
Hales, S. E. G., Masson, C. R., Warner, P. J., Baldwin, J. E., and
Green, D. A. 1993a, MNRAS, 262, 1057 =1993MNRAS.262.1057H
Hales, S. E. G., Baldwin, J. E., and Warner, P. J. 1993b,
MNRAS, 263, 25 =1993MNRAS.263...25H
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(End) Nancy Oliversen and Paul Kuin (ADC) 11-May-1995