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J/MNRAS/276/614 Radio-optical 151MHz survey of the N. Ecl. Cap (Lacy+ 1995)
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A radio-optical survey of the North Ecliptic Cap.
Lacy M., Riley J.M., Waldram E.M., McMahon R.G., Warner P.J.
<Mon. Not. R. Astron. Soc. 276, 614 (1995)>
=1995MNRAS.276..614L (SIMBAD/NED BibCode)
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ADC_Keywords: Radio sources
Keywords: surveys - radio continuum: general
Description:
The Cambridge Low Frequency Synthesis Telescope has been used to
survey a region ~7x7deg^2^ about the North Ecliptic Cap at 151MHz with
a resolution of 70x77arcsec^2^. The resulting radio source catalogue
of 400 sources is complete to a peak flux density limit of
120mJy/beam. Using the Cambridge APM we have searched for
identifications on the Palomar Sky Survey plate 550 which covers much
of the survey area, and we list the 157 sources with one or more
optical objects within 15arcsec of the radio position.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2 80 400 The radio source list
table3 55 200 Optical objects within 15 arcsec of the
beam-fitted positions
table3.tex 142 252 LaTeX version of table3
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Byte-by-byte Description of file: table2
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Radio source name
12 A1 --- m_Name Multiplicity index on name
14- 15 I2 h RAh Right ascension obtained from beam-fitting (1950)
17- 18 I2 min RAm Right ascension obtained from beam-fitting (1950)
20- 23 F4.1 s RAs Right ascension obtained from beam-fitting (1950)
25 A1 --- DE- Declination sign
26- 27 I2 deg DEd Declination obtained from beam-fitting (1950)
29- 30 I2 arcmin DEm Declination obtained from beam-fitting (1950)
32- 33 I2 arcsec DEs Declination obtained from beam-fitting (1950)
35- 36 I2 h RAc.h Right ascension of source centroid (1950)
38- 39 I2 min RAc.m Right ascension of source centroid (1950)
41- 44 F4.1 s RAc.s Right ascension of source centroid (1950)
46 A1 --- DEc.- Declination sign
47- 48 I2 deg DEc.d Declination of source centroid (1950)
50- 51 I2 arcmin DEc.m Declination of source centroid (1950)
53- 54 I2 arcsec DEc.s Declination of source centroid (1950)
56- 59 F4.2 Jy Flux Flux obtained from beam-fitting
62- 65 F4.2 Jy FInt Integrated flux
67- 68 I2 --- S/N Signal-to-noise ratio for each source (1)
70- 73 F4.1 --- Extent The extent of the source, in units of the local
beam area
75 I1 --- m Number of local maxima within the integration
region.
77- 78 I2 --- POSS Result of the APM scan: this is the number of
optical objects found on the E550 or O550 POSS
plates when the source lies on the area covered
by these plates and is -1 otherwise.
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Note (1): Defined as the height of the interpolated maximum on the map divided
by the map local noise.
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Byte-by-byte Description of file: table3
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Radio source name.
12 A1 --- m_Name If there is more than one optical object
within 15 arcsec, the optical objects are
named 7CXXXX+XXXXa, b , c etc.
14- 18 F5.1 arcsec dRA Difference in R.A. between the radio and
optical positions
20- 24 F5.1 arcsec dDE Difference in Dec. between the radio and
optical positions
26- 29 F4.1 arcsec Dist Radial distance between the radio and optical
positions
31- 32 I2 --- EClass ? Object classification on the E-plate (1)
34- 38 F5.2 mag Emag ? Magnitude on the E-plate
40- 41 I2 --- OClass ? Object classification on the O-plate (1)
43- 47 F5.2 mag Omag ? O-magnitude
49 A1 --- l_O-E Limit flag on O-E
50- 53 F4.2 mag O-E O-E colour
55 I1 --- Notes ? Notes (2)
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Note (1): -1 for a stellar object
+1 for a resolved object
+2 for a confused object.
A blank indicates a non-detection.
Note (2): Numbers in this column indicate overlap with the sample of
Lacy et al., 1993MNRAS.263..707L
1: the optical object is the probable identification according to
Lacy et al., 1993MNRAS.263..707L
2: probable mis-identification
3: the special case of 7C1821+6419
(see Lacy et al., 1992MNRAS.258..828L)
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Acknowledgements: Mark Lacy <m.lacy1@physics.oxford.ac.uk>
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(End) Patricia Bauer [CDS] 13-Dec-1996