The following document lists the file expl.txt
from catalogue VII/165A.
A plain copy of the file
(without headers/trailers) may be downloaded.
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A catalogue of measured redshifts of Abell clusters of galaxies
ANDERNACH H.: 1991; electronic appendix to a paper in
ASP Conf. Ser. 15, 279 (eds. D.W.Latham and L.N.daCosta)
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Abstract: This catalogue was first presented on the Workshop on 'Large
Scale Structure and Peculiar Motions in the Universe', Rio de Janeiro, May
1989. Note that while the conference proceedings were published only in 1991,
the present catalogue is the original one, compiled from papers published
until May 1989! The present documentation was improved over the original one
of 1989 upon integration of the catalogue into the CDS archive in Jan. 1994.
The present documentation should be distributed with EVERY copy of the
machine-readable compilation. When the data have been used for a publication,
reference should be made to both ASP-CS 15,279 as well as to CDS VII/165.
Keywords: Clusters of Galaxies, Redshifts
The 'ACO' catalogue (Abell, Corwin and Olowin 1989, ApJS 70, 1) contains
4076 rich (A-)clusters of galaxies and 1174 supplementary (S-)clusters
(not fulfilling the Abell criteria). These comprise:
* 2712 northern (rich) Abell clusters,
* 1364 southern rich clusters,
* 1174 supplementary (S-)clusters, = 5250 entries in total.
For the present compilation many papers containing galaxy redshifts were
checked for positional coincidences of objects with Abell clusters (typically
within one Abell radius). For a total of 1059 ACO clusters a redshift for one
or more galaxies (including some foreground objects, MARKED as such!) were
found. These clusters are listed in a condensed format, strictly sorted by
the R.A.(B1950) of their centre.
The columns of the compilation give the following information:
- cluster name. A = rich; S = supplementary, i.e. poor or distant cluster,
not fulfilling the Abell criteria). Note that contrary to the 1989
version (listing e.g. 'A0014') the present version gives the name always
in (a1,i4)-format (i.e. 'A 14' or 'S 2'). This may be important when
sorting the compilation by cluster name or number.
- cluster centre right ascension and declination (B1950) as of ACO,
including revisions by Struble & Rood (1987, ApJS 63, 555);
the format is hhmmm+ddmm, where the last digit of RA denotes the decimal
fraction of minutes of time.
- three-digit combination of richness, distance and Bautz-Morgan class,
appended by the BM quality code as of ACO. Some more BM-classes
were taken from Ciardullo et al.(1985), ApJ 293, 69.
- the magnitude (in units of 0.1 mag) of the tenth-brightest cluster member.
This magnitude is on the southern scale (m10_S) whenever such a value was
given by ACO (i.e. for almost all clusters south of DEC(B1950) = -17 degs,
and on the northern scale (m10_N) for all other clusters. Note that the
scale of m10 (whether S or N) CANNOT be recovered from the present list,
but only from the full ACO catalogue (CDS VII/110). Since these scales are
significantly different, no attempt should be made (based on the m10-values
of the present list alone) for an all-sky fit to an m10-z relation.
- cluster redshift in units of 0.0001 and galactocentric - as far as original
publications allowed. It is preceded by a QUALITY CODE as follows:
' ' z measured and within factor 2 of the m10-estimate N= 893
':' z measured and within factor 2 to 4 of the m10-estimate N= 99
'*' z measured but outside the above range. Likely due to fore-
ground or backgr. object; rejected for m10-z relation N= 24
'!' listed redshift is average of very discordant ones, indicating
possible line-of-sight projection of clusters. Not useful
for photometric redshift calibration! N= 10
'?' listed redshift is from a single peripheral object, within a
factor of 2 from estimate (not to be used for m10-z fits) N= 9
'f' cluster is known from published notes to have foreground
galaxies. The listed redshift likely due to these objects
and to be rejected for m10-z fits N= 24
The redshift is followed by a reference code (see below)
Note: THESE QUALITY CODES MUST BE TAKEN INTO ACCOUNT FOR ANY STATISTICAL
ANALYSES (cf. Muriel et al. 1990, AJ 100, 339, Figs 1a and 1b!)
The numbers of galaxies contributing to the redshifts (not listed here)
is an important quality factor and will be included in a future
version of this compilation (in preparation).
- the Abell radius (= 3 Mpc/Ho/50) in units of 0.1 arcmin, using qo = 0.10
- the decimal log of the ratio between measured and estimated redshift
Redshift reference codes and frequency of occurence:
A=Abell,Corwin,Olowin89, ApJS 70,1 760 m=Metcalfe et al. 89, MNRAS 236,207 2
B=Barbon+Capaccioli 86, A&AS 64,503 3 N=Kirshner et al. 87, PASP 99, 1261 4
b=Bothun et al. 1985, AJ 90, 2487 3 n=Maia,daCosta,Latham 89,ApJS 68,809 1
C=Colless & Hewett 87 MNRAS 127,847 14 o=Fabricant et al. 89, ApJ 336, 77 1
c=Cristiani et al. 1987, AA 179,108 1 O=Owen, White, Thronson 88, AJ 95,1 11
D=Dressler & Shectman 88, AJ 95,985 12 p=Giovanelli & Haynes 89, AJ 97,633 1
d=daCosta et al. 1989, AJ 97, 315 13 q=Struble & Rood 1987, ApJS 63, 543 34
E=Dressler 1980, ApJS 42, 565 0 R=Rhee & Katgert 1988, AAS 72, 243 29
e=Danziger & Goss 83, MNRAS 202,703 1 S=Shectman 1985, ApJS 57, 77 4
F=Fairall & Jones 88, Pub.Ast.Dept. s=Schmidt 1986, Astr.Nachr. 307, 69 30
Univ.CapeTown 10(6229ent/130refs) 88 T=Cheng & Fang 1987, MNRAS 226,485 2
f=Focardi et al. 1986, AA 161, 217 1 t=Carter & Teague 84, ProcASA 5,502 2
G=Giovanelli et al. 86, AJ 92, 250 2 U=Unger et al. 1989, MNRAS 236, 425 6
g=deGrijp+87,A&AS 70,95; Nat 314,240 5 V=Wasilewski 1983, ApJ 272, 68 3
H=Hill et al. 1988, ApJ 332, L23 1 v=Leech et al. 1988, MNRAS 237, 977 2
h=Hill et al. 1988, AJ 95, 1031 1 W=West 1977, A&AS 27, 73 1
i=Ciardullo et al. 1985, ApJ 293,69 2 w=West & Frandsen 81, A&AS 44,329 1
j=Carico et al. 1986, AJ 92, 1254 1 X=combination of F and U 1
K=Kowalski et al. 1987, AJ 93, 1350 4 x=combination of f and M 1
k=Kirshner et al. 87, ApJ 314, 493 3 Y=combination of E and U 1
l=Kopylov et al.84, Astr.Tsirk.1344 4 y=combination of d and n 1
L=Lewis et al. 1985, ApJS 59, 161 1 z=combination of E and A 1
M=Michel & Huchra 88, PASP 100,1423 0 Total= 1059
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A list of all ACO clusters, sorted in R.A.(1950) and including all redshift
estimates (based on the 1989 fit) is available on request from the author.
Present address:
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(End) Heinz Andernach Obs. de Lyon 08-Jan-1994
© UDS/CNRS