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VIII/29A 1400-MHz Survey of 1478 Abell Clusters of Galaxies (Owen+ 1982)
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A 1400-MHz Survey of 1478 Abell Clusters of Galaxies
Owen F.N., White R.A., Hilldrup K.C., Hanisch R.J.
<Astron. Journ. 87, 1083 (1982)>
=1982AJ.....87.1083O
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ADC_Keywords: Radio sources ; Galaxies, radio ; Clusters, galaxy ; Surveys
Description:
This catalog contains observations of Abell clusters of galaxies which
were obtained with the Green Bank 91-m telescope at 1400 MHz with an
angular resolution of 10'x11' (RAxDEC). This catalog extends the
sample of clusters originally published in Owen (1974). The primary
goals of this survey were to observe all Abell (1958) clusters with
m10 (magnitude of the tenth brightest galaxy in the cluster) less than
or equal to 17.0 and declinations north of -19 degrees, to observe all
clusters with richness GE 3 regardless of m10, and to obtain observations
of a representative sample of the rest of the catalog (m10 GE 17.0;
richness LE 2). The abelclus.dat file contains ALL 957 detected sources
(also beyond 0.5 corrected Abell radii). It contains 525 sources within
0.5 corrected Abell radii, while the published table1.dat file contains 487
entries corresponding to 485 distinct sources (in 442 clusters). The
catalog entries contains the flux density at 1400 MHz, the Abell cluster
number, richness class, distance class, m10, redshift estimate (z),
corrected Abell cluster radius, right ascension (B1950), declination
(B1950), deconvolved major and minor source axis lengths, position angle,
and distance of the source from the cluster center.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 92 487 *Sources detected within 0.5 corrected Abell
cluster radii
abelclus.dat 92 957 *1400-MHz survey of Abell Clusters
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Note on table1.dat:
IDENTICAL to the original published version.
Two sources are attached to more than one clusters:
A1941 at B143529.2+303706 is also in A1944
A2196 at B162544.3+412828 is also in A2197
Two sources are below the formal flux limit of 0.10 Jy stated in the
original paper:
A 428 at B031337.7-191616 S1400=0.09+/-0.04
A 999 at B102034.2+125722 S1400=0.09+/-0.04
Note on abelclus.dat: contains ALL 957 detected sources
(also beyond 0.5 corrected Abell radii)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- ID [11,2695] Abell cluster number
5 A1 --- Note *[+*] Note on Abell cluster number
7 I1 --- Rich Richness class
9 I1 --- Dist Distance class
11- 14 F4.1 mag m10 ]0,] Magnitude of tenth brightest galaxy
16- 19 F4.3 --- z *]0,] Redshift (z) estimate
21- 25 F5.1 arcmin Radius ]0,] Corrected Abell cluster radius
27- 28 I2 h RAh Right ascension (B1950)
29- 30 I2 min RAm Right ascension (B1950)
31- 34 F4.1 s RAs Right ascension (B1950)
36- 39 F4.1 s e_RAs Error in right ascension
41 A1 --- DE- Declination: sign
42- 43 I2 deg DEd Declination (B1950)
44- 45 I2 arcmin DEm Declination (B1950)
46- 47 I2 arcsec DEs Declination (B1950)
49- 51 I3 arcsec e_DEs Error in declination
53- 57 F5.2 Jy S1400 ]0,] Total flux density at 1400 MHz
59- 62 F4.2 Jy e_S1400 ]0,] Flux density error at 1400 MHz
64- 65 I2 arcmin Maj *? [0,] Deconvolved major axis length
67- 68 I2 arcmin e_Maj *? ]0,] Major axis error
70- 71 A2 --- n_Maj *[ABCNR ] Major axis note
73- 74 I2 arcmin Min *? [0,] Deconvolved minor axis
76 I1 arcmin e_Min *? ]0,] Minor axis error
78- 79 A2 --- n_Min *[ABCNR ] Minor axis note
81- 83 I3 deg PA *? [0,360[ Position angle
85- 87 I3 deg e_PA *? ]0,] Position angle error
89- 92 F4.2 pc dist-C *? ]0,] Distance from cluster center
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Note on Note:
+ = Complex region, fluxes and positions not very accurate. Total flux about
700 mJy.
* = Outside of Abell's (1958) region of complete identification.
Note on z:
The redshift was estimated using using the method of Corwin (1974)
including a richness correction.
Note on Maj, e_Maj, Min, e_Min, PA, and e_PA:
These columns contain entries for sources not included in Owen (1974) or
for sources with new measurements.
Note on n_Maj, n_Min:
For sources from Owen et al. (1974) a resolution code is given; NR (not
significantly resolved or less than 5 arcmin), A (5-10 arcmin), B (10-15
arcmin), C (greater than 15 arcmin). These values refer to the source
sizes after deconvolution with the telescope beam.
Note on dist-C:
Ratio of the distance of the source from the cluster center to the
corrected Abell cluster radius.
Byte-by-byte Description of file: abelclus.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- ID [7,2710] Abell cluster number
6 I1 --- Rich Richness class
8 I1 --- Dist Distance class
10- 13 F4.1 mag m10 ]0,] Magnitude of tenth brightest galaxy
15- 18 F4.3 --- z *]0,] Redshift (z) estimate
20- 24 F5.1 arcmin Radius ]0,] Corrected Abell cluster radius
26- 27 I2 h RAh Right ascension (B1950)
28- 29 I2 min RAm Right ascension (B1950)
30- 33 F4.1 s RAs Right ascension (B1950)
35- 38 F4.1 s e_RAs Error in right ascension
40 A1 --- DE- Declination: sign
41- 42 I2 deg DEd Declination (B1950)
43- 44 I2 arcmin DEm Declination (B1950)
45- 46 I2 arcsec DEs Declination (B1950)
48- 50 I3 arcsec e_DEs Error in declination
52- 56 F5.2 Jy S1400 ]0,] Total flux density at 1400 MHz
58- 61 F4.2 Jy e_S1400 ]0,] Flux density error at 1400 MHz
64- 65 I2 arcmin Maj *[0,]? Deconvolved major axis length
67- 68 I2 arcmin e_Maj *]0,]? Major axis error
70- 71 A2 --- n_Maj *[ABCNR ] Major axis note
73- 74 I2 arcmin Min *[0,]? Deconvolved minor axis
77 I1 arcmin e_Min *]0,]? Minor axis error
79- 80 A2 --- n_Min *[ABCNR ] Minor axis note
82- 84 I3 deg PA *[0,180]? Position angle
86- 87 I2 deg e_PA *[0,]? Position angle error
89- 92 F4.2 --- dist-C *[0,] Distance from cluster center (in units
of the Abell radius)
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Note on z:
Same as note for table1.dat.
Note on Maj, e_Maj, Min, e_Min, PA and e_PA:
Same as note for table1.dat.
Note on n_Maj, n_Min:
Same as note for table1.dat.
Note on dist-C:
Same as note for table1.dat.
History:
*01-Mar-1994 (Nancy A. Oliversen):
The original data (2 lines per source and higher accuracy
parameters) were reformatted by H. Andernach, to one line per
source, and truncated to the published, significant digits.
Moreover, the sources were sorted by B1950 coordinates, not by
Abell cluster number as in the original publication. Information
on whether the cluster is in Abell's statistical sample was not
contained in the data file from R.J. Hanisch, but can be recovered
e.g. from Struble and Rood (1987) (cf. NASA ADC catalog A7096).
Two additional columns (n_Maj, n_Min) were added to the ADC
version of this catalog by extracting the character fields from
the original Maj and Min columns, in order to avoid mixing numeric
and character fields in the same columns.
*18-Jul-1994 (with H. Andernach at CDS):
The last two columns (e_PA and dist-C) which were missing
in file "abelclus.dat" have been added.
*09-Nov-2000 (ADC):
Added published version (table1.dat) as received from H. Andernach.
Original note received from H. Andernach 12-Jun-1999:
The previous version was NOT identical with the published one, but had in
fact almost twice as many radio source entries. I append below (uuencoded
gzipped) a revised version, which I prepared from R.J. Hanisch's original
so that it now matches the published version (I checked that rather
carefully with a transparent overlay method, but please let me know about
possible remaining inconsistencies).
The previous version with 957 entries is worth keeping, as it has
additional source detections) but it should be mentioned WITH THE
APPROPRIATE WARNING of not being identical with the published version.
Acknowledgements:
This catalog was received by the Astronomical Data Center (ADC), NASA
Goddard Space Flight Center, from Heinz Andernach, who originally
received the data on tape from R.J. Hanisch in 1984.
References:
Abell, G. O. 1958, ApJS, 3, 211 =1958ApJS....3..211A
Corwin, H. G. 1974, AJ, 79, 1356 =1974AJ.....79.1356C
Owen, F. N. 1974, AJ, 79, 427 =1974AJ.....79..427O
Struble, and Rood, 1987, ApJS, 63, 555 =1987ApJS...63..555S
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(End) Nancy A. Oliversen [NASA/NSSDC/ADC] and H. Andernach [CDS] 01-Mar-1994