J/A+AS/71/221 The 65W part of the WSRT 21 cm survey in Lynx (Oort, 1987)
A deep WSRT 21 cm survey down to 0.1 mJy in the Lynx area.
Oort M.J.A.
<Astron. Astrophys. Suppl. Ser. 71, 221 (1987)>
=1987A&AS...71..221O 1987A&AS...71..221O
ADC_Keywords: Radio sources
Keywords: radio source surveys - radio source counts - radio interferometers
Description:
Observations of the field Lynx 3A, obtained at 21cm with 5σ peak
flux 85µJy using the 3-km array of the Westerbork Synthesis Radio
Telescope for 16x12h periods during 1984, are reported. Details of the
observations and the data reduction are given, and the results are
presented in extensive tables and maps. A complete sample of 321
objects within the 0.5° attenuation radius is selected from the
349 objects detected above 85µJy, and the 1.412GHz source counts
down to 100µJy are found to be in good agreement with VLA surveys
of similar depth. The median angular size of sources with total flux
density between 350µJy and 10mJy is shown to be less than 10arcsec.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 160 359 The source list for the complete sample
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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+AS/58/1 : 1412 MHz catalogue of Westerbork survey. I. (Windhorst+ 1984)
J/A+A/58/39 : 1412 MHz catalogue of Westerbork survey. II. (Windhorst+ 1984)
J/A+AS/124/259 : Westerbork Northern Sky Survey I. (Rengelink+ 1997)
J/A+AS/73/103 : The 64W part of the WRST Survey (Oort+, 1988)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- 65W Source name following the Westerbork
convention (1)
7 A1 --- m_65W [AB*] Multiplicity index on 65W (1)
9- 10 I2 h RAh Right Ascension B1950 (hours)
11- 12 I2 min RAm Right Ascension B1950 (minutes)
13- 17 F5.2 s RAs Right Ascension B1950 (seconds)
19- 22 F4.2 s e_RAs Mean error on RA (2)
24 A1 --- DE- Declination B1950 (sign)
25- 26 I2 deg DEd Declination B1950 (degrees)
27- 28 I2 arcmin DEm Declination B1950 (minutes)
29- 32 F4.1 arcsec DEs Declination B1950 (seconds)
34- 37 F4.1 arcsec e_DEs Mean error on Declination (2)
40- 46 F7.2 mJy S1412MHz Total flux density at 1412MHz, corrected
for primary beam attenuation and noise
induced flux overestimation.
48- 52 F5.2 mJy e_S1412MHz Mean error on S1412MHz (2)
54 A1 --- f_65W [URE] Resolution code (3)
57- 60 F4.1 arcsec psi ? The largest angular size psi (4)
63- 65 F3.1 arcsec e_psi ? rms uncertainty on psi (2)
67- 69 I3 deg PApsi ? The position angle phi of the major axis,
measured in degrees from North to East.
71- 72 I2 deg e_PApsi ? rms uncertainty on PApsi (2)
74- 77 F4.1 arcsec chi ? The angular size X in the direction
perpendicular to the major axis
80- 83 F4.2 --- F ? The component flux ratio
85- 90 F6.2 mJy Ssky Sky flux not corrected for noise
overestimation.
92- 96 F5.2 mJy e_Ssky rms uncertainty on Ssky (2)
98-104 F7.2 --- SP/N The peak flux signal-to-noise ratio.
107-111 F5.2 --- R Normalized source area (5)
113-118 F6.3 --- Att The attenuation factor at the position of
the source
120-125 F6.3 --- w_65W ? Weight of the source in the source counts.
127-129 A3 --- Rem [*VH TC] Individual notes (6)
133-160 A28 --- Aname The alternative name, if the source has
been included in a previous catalogue (7)
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Note (1): The source name following the Westerbork convention.
The Westerbork survey number (65W) followed by a sequence number in
order of increasing right ascension. Multi-component or complex
sources are designated by an asterisk behind its Westerbork name.
Each component is listed directly below, labeled A, B, C... in order
of right ascension. Any central component is always labeled "*".
Note (2): All parameters have their 1 sigma errors listed.
Errors in position and flux were calculated using the signal-to-noise
dependent quadratic relations described in Windhorst et al. (1984,
Cat. J/A+AS/58/1), using the empirically determined coefficients
from Oort and Windhorst (1985A&A...145..405O 1985A&A...145..405O):
(e_RA)2= (NR/Sp)^2 Cp2 + Cra2
(e_DE)2= (NR/Sp)^2 (Cp/sin(DE))2 + Cde2
(e_Ssky)2= Stot2 [(N/Sp)2+CS2+(Δρ*Δτ)2]
with
Cp = 0.5 HPBW, Cra= 0.04 HPBW,
Cde= 0.03 HPBW, CS = 0.03 and Δρ = 0.006°
Note (3): Resolution code:
U: unresolved
R: resolved
E: multi component
Note (4): For resolved sources, the angular size from the deconvolved
major axis. For extended sources, the distance between the centers of
the two outermost components.
Note (5): R is defined as, R =(asou*bsou)/(aapt*bapt), where
asou and bsou are the major and minor half widths of the source,
and aapt and bapt of the antenna pattern.
Note (6): Notes:
* : The source is not part of the complete radio sample.
V : The source is variable, either because it was marked as such in
the LBDS (Cat. J/A+AS/58/1), or because the flux found differs
more than 2.5σ from the flux given in the LBDS
(Cat. J/A+AS/58/1).
H : A low surface brightness halo is present, judged from a
comparison with the 1.5 km map.
T : The source has a tail.
C : A contour of the source is given in figure 4.
Note (7): Catalogues:
55Wxxx: LBDS, Windhorst et al. (1984, Cat. J/A+AS/58/1,
identified as WSTB 55W NNA in Simbad
60Wxxx: Oort and Windhorst (1985A&A...145..405O 1985A&A...145..405O),
identified as 60W NNN in Simbad
0843xx: Windhorst et al. (1985ApJ...289..494W 1985ApJ...289..494W),
identified as WMOKK HHMM+DD.NN A in Simbad
OJxxx : Brundage et al. (1971AJ.....76..777B 1971AJ.....76..777B)
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Acknowledgements:
We thank Heinz Andernach who originally prepared
this catalogue (numbered R184 in his list)
* 29-Dec-2001: errors detected by Marion Schmitz ()
have been corrected for 65W076, 65W284, 65W164.
(End) Francois Ochsenbein [CDS] 03-Aug-2001