J/MNRAS/298/637 7C: 151MHz survey of 3 regions (Pooley+, 1998)
The 7C survey of radio sources at 151 MHz: three regions centred at
RA=10h05min, DE=53deg54', RA=10h42min, DE=57deg36' and RA=13h32min, DE=38deg10'
Pooley D.M., Waldram E.M., Riley J.M.
<Mon. Not. R. Astron. Soc. 298, 637 (1998)>
=1998MNRAS.298..637P 1998MNRAS.298..637P
ADC_Keywords: Radio sources ; Surveys
Keywords: catalogues - surveys - radio continuum: general
Abstract:
The Cambridge Low Frequency Synthesis Telescope has been used at
151MHz to survey three regions centred at RA=10h05min, DE=53°54',
RA=10h42min, DE=57°36' and RA=13h32min, DE=38°10', each of
area 7.3x7.3cosec(DE)deg2. The resolution is
70x70cosec(DE)arcsec2, and the rms noise on the maps is typically
15mJy/beam. We present positions and flux densities for 2381 sources
which have signal-to-noise ratios >5.5.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
100553.dat 74 743 7C sourcelist of 743 sources
104257.dat 74 757 7C sourcelist of 757 sources
133238.dat 74 881 7C sourcelist of 881 sources
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See also:
VIII/84 : A final non-redundant catalogue for 7C 151-MHz survey (Hales+ 2007)
J/A+AS/110/419 : 7C 151MHz survey of region RA=17h, DE=+65deg (Visser+, 1995)
J/MNRAS/282/779 : 7C 151MHz survey of region 9-16h 20-35deg (Waldram+ 1996)
J/MNRAS/294/607 : 7C(G) 151MHz survey of the Galactic plane (Vessey+ 1998)
Table 1: The RAxDec coverage, average rms noise, flux density of the faintest
source listed and completeness limit for each region catalogued are
given in the table below. All coordinates are equinox B1950.
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Region Coverage RA x DE (see notes*) av.rms noise Sfaint Scomp
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1005+53 09h40m-10h30m;49deg05'-58deg20' 15mJy 50mJy 170mJy
1042+57 10h10m-11h10m;53deg00'-61deg45' 13mJy 50mJy 150mJy
1332+38 13h15m-13h50m;31deg40'-43deg45' 14mJy 50mJy 200mJy
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*Note: RA coverage is indicated by approx RA range at DE of field centre
*Note: DE coverage is indicated by approx DE range at RA of field centre
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Byte-by-byte Description of file: *.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Beam-fitted position right ascension (B1950) (1)
4- 5 I2 min RAm Beam-fitted position right ascension (B1950)
7- 10 F4.1 s RAs Beam-fitted position right ascension (B1950)
12 A1 --- DE- Beam-fitted position declination sign (B1950)
13- 14 I2 deg DEd Beam-fitted position declination (B1950)
16- 17 I2 arcmin DEm Beam-fitted position declination (B1950)
19- 20 I2 arcsec DEs Beam-fitted position declination (B1950)
24- 25 I2 h RACh Centroid position right ascension (B1950)
27- 28 I2 min RACm Centroid position right ascension (B1950)
30- 33 F4.1 s RACs Centroid position right ascension (B1950)
35 A1 --- DEC- Centroid position declination sign (B1950)
36- 37 I2 deg DECd Centroid position declination (B1950)
39- 40 I2 arcmin DECm Centroid position declination (B1950)
42- 43 I2 arcsec DECs Centroid position declination (B1950)
47- 52 F6.3 Jy S Beam-fitted 151MHz flux density (in Jy/beam) (2)
54- 59 F6.3 Jy Sint Integrated 151MHz flux density (2)
61- 65 F5.1 --- SNR Signal-to-noise ratio
67- 70 F4.1 --- Extent Extent of the source in units of local beam
area
74 I1 --- Nmax Number of local maxima within the integrated
region
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Note (1): 1-sigma errors on the listed source positions may be approximated by:
Right Ascension error(arcsec) = SQRT(1.0**2 + (32/SNR)**2)
Declination error(arcsec) = 1.3cosec(DE) x (RA error)
Note (2): 1-sigma errors on the listed flux densities may be approximated by:
Error on S beam-fitted(Jy) = SQRT(0.03**2 + SNR**-2) x S(Jy)
Error on Sint(Jy) = 1.5 x SQRT(0.03**2 + SNR**-2) x Sint(Jy)
For multi-component sources the SNR for the brightest component is
used to estimate the Sint error.
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Acknowledgements: Sally Hales
(End) Sally Hales [MRAO], Patricia Bauer [CDS] 13-Nov-1998