J/A+AS/58/1 1412 MHz catalogue of Westerbork survey. I. (Windhorst+, 1984)
A deep Westerbork survey of areas with multicolor Mayall 4 m plates.
I. The 1412 MHz catalogue, source counts and angular size statistics.
Windhorst R.A., van Heerde G.M., Katgert P.
<Astron. Astrophys. Suppl. Ser. 58, 1 (1984)>
=1984A&AS...58....1W 1984A&AS...58....1W
ADC_Keywords: Radio sources ; Surveys
Keywords: radio source: general - surveys catalogues - cosmology
Abstract:
A radio survey has been conducted with the Westerbork Synthesis Radio
Telescope for nine fields in four high latitude areas for which deep,
multicolor Kitt Peak 4-m plates are available. A total of 471 sources
are tabulated; 306 of these form a well defined, complete sample. The
influence of the selection criteria on sample completeness is
discussed. Angular size distribution has been precisely derived, in
virtue of the 3 km resolution obtainable with the present instrument,
and a smaller fraction of sources larger than about 20arcsec is noted
for the 1-10mJy range than for the 10-100mJy. The 1412MHz source
counts are consistent at different cutoff levels, showing that the
statistical corrections for population and resolution bias are
reliable. The present counts are consistent with previous 1.4GHz
counts, which are here given for the 1-100000mJy flux range.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table7.dat 157 536 Source list for SA57, Hercules, SA68 and Lynx fields
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See also:
VIII/62 : The Westerbork Northern Sky Survey (Leiden, 1998)
J/A+A/35/393 : Westerbork Second Deep Survey (Katgert, 1974)
J/A+A/58/39 : 1412 MHz catalogue of Westerbork survey. II. (Windhorst+, 1984)
Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- WSTB Westerbork designation (1)
7 A1 --- m_WSTB [*ABC] Multiplicity index on Name (2)
9- 18 A10 --- IName Internal name
19 A1 --- m_IName [*ABC] Multiplicity index on IName (2)
21- 22 I2 h RAh Right ascension (1950.0)
23- 24 I2 min RAm Right ascension (1950.0)
25- 29 F5.2 s RAs Right ascension (1950.0)
30 A1 --- DE- Declination sign (1950.0)
31- 32 I2 deg DEd Declination (1950.0)
33- 34 I2 arcmin DEm Declination (1950.0)
35- 38 F4.1 arcsec DEs Declination (1950.0)
40- 43 F4.2 s e_RAs rms uncertainty on right ascension
45- 48 F4.1 arcsec e_DEs rms uncertainty on declination
51- 57 F7.2 mJy S1412MHz Total flux density at 1412MHz (3)
59- 64 F6.2 mJy e_S1412MHz rms uncertainty on S1412MHz
66- 67 A2 --- Res [UREDT ] Resolution code (4)
69 A1 --- l_Size Limit flag on Size
70- 74 F5.1 arcsec Size Intrinsic largest angular size, or 1σ
upper limit for unresolved sources
76- 78 F3.1 arcsec e_Size ? rms uncertainty on Size
80- 82 I3 deg PA ? Position angle
84- 85 I2 deg e_PA ? rms uncertainty on PA
88- 91 F4.1 arcsec chi ? Deconvolved minor axis
94- 97 F4.2 --- F ? Component ratio flux
100-106 F7.2 mJy SSky Observed total sky flux density (5)
107-112 F6.2 mJy e_SSky rms uncertainty on SSky
115-120 F6.2 --- Sp/N Observed map peak signal-to-noise ratio
123-126 F4.2 --- R Observed normalized source area
128-134 F7.3 --- Att Attenuation factor
136-140 F5.2 --- Weight Weight that the source should have in the
source counts or in optical identification
statistics (6)
142-147 A6 --- Notes Notes (7)
148-157 A10 ---- OName Other name
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Note (1): Westerbork designation that consist of the Westerbork Survey number,
which is 52 for SA57, 53 for Hercules, 54 for SA68 and 55 for Lynx,
and a sequence number, in order of increasing RA.
WSTB 52W NNA, WSTB 53W NNA, WSTB 54W NNA and WSTB 55W NNA in Simbad.
Note (2): An * indicates that for this source multiple components were found,
which are listed directly below, and are labelled A, B, C, etc.
A detectable central component is always labelled "C".
Generally, A and B are the western and easternmost components
Note (3): Total flux density, corrected for primary beam attenuation and
noise overestimation. This value is unbiased or best estimate of the
total flux density.
Note (4): Resolution code:
U: unresolved
R: resolved
E: extended
ET: extended triple
ED: extended double
Note (5): Observed total sky flux density, not corrected for noise
overestimation.
Note (6): The weight includes both incompleteness due to primary beam
attenuation and resolution bias.
Note (7): Notes:
@ : the source was below the 5σ peak flux density cut-off in
the 3km map, but above this level in the 1.5km map.
O : the source was seen in the overlapping area of two fields.
For SA57, it means that is was also seen in the VLA map of
Owen and Thuan.
V : the total fluxes in the two overlapping fields differed by more
than 3 times the combined flux error so that the source may be
variable
H : the source has a low surface brightness halo as found by
comparison of contour lots from the 1.5 and 3km maps.
T : head tail source, generally suggested by the position of the
optical identification (see Paper II, Windhorst et al.,
Cat. J/A+A/58/39)
B : a bridge of radio emission is visible between the components of
an extended source
X : detected as an X-ray source by the Einstein Observatory
(Katgert et al., 1983ApJ...275....1K 1983ApJ...275....1K)
C : a contour plot of this source is given in figure 10.
* : radio source not in the complete sample (table7b of the publication)
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History:
In Andernach's list as number R305
References:
Windhorst et al., Paper II 1984A&AS...58...39W 1984A&AS...58...39W, Cat. J/A+A/58/39
Windhorst et al., Paper III 1985A&A...146...38K 1985A&A...146...38K
(End) Patricia Bauer [CDS] 10-May-2001