VIII/46 Molonglo deep sky survey of radio sources (Robertson+ 1977-1984)
Molonglo deep sky survey of radio sources
Robertson J.G.; White G.L.
<Austral. J. Phys. 30, 209; 30, 231 (1977)>
<Proc. Astron. Soc. Australia, 5, 290 (1984)>
=1977AuJPh..30..209R 1977AuJPh..30..209R
=1977AuJPh..30..231R 1977AuJPh..30..231R
=1984PASAu...5..290W 1984PASAu...5..290W
ADC_Keywords: Radio sources ; Radio continuum
Description:
The observations for the MDS1 were made in Sep. 1973 over a period of
16 days, and consist of drift scans with the telescope set to one
declination number (-20 and -62°) during the transit of the RA
range of the survey, and scanning a long narrow strip of sky. The MDS2
results from observations made in 1978 with the same telescope working
at its maximum sensitivity
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
mds1.dat 70 468 Molonglo Deep Survey at 408MHz in zones -20
and -62° (Robertson, 1977)
mds2.dat 75 799 A confusion limited Radio survey from the Molonglo
Cross (White G.L., 1984)
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See also:
VIII/16 : Molonglo Reference Catalogue of Radio Sources (Large+ 1991)
J/MNRAS/227/607 : Optical identifications of Molonglo I (White 1987)
J/ApJS/107/19 : MRC/1Jy Radio source survey. I. (McCarthy+ 1996)
Byte-by-byte Description of file: mds1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- MDS1 Source identification, from B1950 position
(HHMM+DDdA)
11 A1 --- n_MDS1 [*:] *=source in MC1 (1973AuJPA..28....1D 1973AuJPA..28....1D);
:=uncertain identification
14- 15 I2 h RAh Right Ascension B1950 (hours)
16- 17 I2 min RAm Right Ascension B1950 (minutes)
18- 21 F4.1 s RAs Right Ascension B1950 (seconds)
23- 25 F3.1 s e_RAs r.m.s. error on RA
26 A1 --- n_RAs [+] extended source along RA (G1)
28 A1 --- DE- Declination B1950 (sign)
29- 30 I2 deg DEd Declination B1950 (degrees)
31- 32 I2 arcmin DEm Declination B1950 (minutes)
33- 34 I2 arcsec DEs Declination B1950 (seconds)
36- 37 I2 arcsec e_DEs r.m.s. error in Declination
38 A1 --- n_DEs [+] extended source along Dec (G1)
41- 43 I3 mJy S408 Flux density at 408MHz
45- 46 I2 mJy e_S408 r.m.s. error on S408
47 A1 --- f_S408 [+] extended source (G1)
48 A1 --- n_S408 [I] "I" indicates S408 is an integrated flux
49- 52 A4 --- Fig [FMPKS0-9 ] Remarks about source fitting (2)
54- 70 A17 --- Notes Remarks and numbered notes (3)
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Note (2): Flags as follows:
F = the contour map of the source is given as a figure in the paper
PKS = the source is in the Parkes catalog (see Cat. VIII/15)
M = source fitted manually (not found by the source fitting program)
Note (3): Notes numbered as follows:
1 = Extended in both right ascension and declination
2 = Extension primarily in right ascension
3 = Extension primarily in declination
4 = Probably extended, but integrated flux density not used
(see Section 3b(ii))
5 = Flux density obtained manually from the line scans (see Section 3b(iv))
6 = Position given is an approximate centroid for two close peaks which are
not resolved, by the criterion of Section 3b(i)
7 = Position obtained manually from the line scans
8 = Integrated flux density includes a small unresolved source
9 = Uncertainties in position and flux density increased due to variation
in background level
10 = Sources 1646-201 and 1647-200 appear to be connected by a low level
bridge, or to have a third source between them
11 = Declination obtained manually from the line scans
12 = Integrated flux density includes a small unresolved source. The position
given is that of the stronger component
13 = Position obtained manually from contour map
14 = Possibly extended, but integrated flux density not used.
(Extension less significant than for Note 4)
15 = Very close to another catalogued source, but still resolved
(see Section 3b(i))
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Byte-by-byte Description of file: mds2.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- MDS2 Source identification from B1950 position
(HHMM+DDdA)
11- 12 I2 h RAh Right Ascension B1950 (hours)
13- 14 I2 min RAm Right Ascension B1950 (minutes)
15- 18 F4.1 s RAs Right Ascension B1950 (seconds)
20- 22 F3.1 s e_RAs r.m.s. error on RA
23 A1 --- n_RAs [+] extended source along RA (G1)
25 A1 --- DE- Declination B1950 (sign)
26- 27 I2 deg DEd Declination B1950 (degrees)
28- 29 I2 arcmin DEm Declination B1950 (minutes)
30- 31 I2 arcsec DEs Declination B1950 (seconds)
33- 34 I2 arcsec e_DEs error on Declination
35 A1 --- n_DEs [+] extended source along Dec (G1)
37- 39 I3 mJy S408 Flux density at 408MHz
42- 43 I2 mJy e_S408 r.m.s. error on S408
44 A1 --- f_S408 [+] extended source (G1)
46- 70 A25 --- Notes Remarks about source (2)
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Note (2): the remarks use the abbreviations:
MDS1 = source catalogued in MDS1 (table "mds1.dat")
OOTY = source catalogued in Ooty lists:
Subrahmanya and Gopal-krishna (1979MmASI...1....2S 1979MmASI...1....2S),
Venkatakrishna and Swarup (1979MmASI...1...25V 1979MmASI...1...25V),
Joshi and Singal (1980MmASI...1...49J 1980MmASI...1...49J)
Q = source is a confirmed QSO
D(pa,r) = source with a nearby component. The uncatalogued weaker component
is 'r' arcmin distant at position angle 'pa' (°)
E(pa) = source extended along "pa" position angle (°)
CPX = source is part of a complex of sources.
* = source fitted less that 4 times
: = sources in the RA range 11:00 to 17:20 and observed on 1978-04-16,
an observation badly affected by unsteady ionospheric conditions
and rejected.
EDGE = source close to the edge of the survey
m = sources not seen on the MDS2 maps. These sources have been found
4 times by the source fitting program but do not appear on the maps.
They are all weak and may be slightly extended.
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Global Notes:
Note (G1): the '+' indicates that the error should be increased due to
source extension
History:
From H. Andernach collection (R227 in his list)
(End) Heinz Andernach [Guanajuato U.], Francois Ochsenbein [CDS] 15-Jan-2004