[ CATS home ] [ Back to CATS list ] [ ftp ]


VIII/29     1400-MHz Survey of 1478 Abell Clusters of Galaxies (Owen+ 1982)
A 1400-MHz Survey of 1478 Abell Clusters of Galaxies
    Owen F.N., White R.A., Hilldrup K.C., Hanisch R.J.
ADC_Keywords: Radio sources ; Galaxies, radio ; Clusters, galaxy ; Surveys 

   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).   This dataset 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 version has 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:
 FileName       Lrecl  Records   Explanations
ReadMe             80        .   This file
abelclus.dat       86      959   1400-MHz survey of Abell Clusters        

Byte-by-byte Description of file: abelclus.dat                                 
   Bytes  Format   Units   Label     Explanations                                  
   1-  4   I4      ---     ID       *[7,2710] Abell cluster number
       6   I1      ---     Rich     *[0,] Richness class          
       8   I1      ---     Dist      [0,] Distance class 
  10- 13   F4.1    mag     m10       ]0,] Magnitude of tenth brightest galaxy      
  15- 18   F4.3    ---     zest     *]0,] Redshift (z) estimate                   
  20- 24   F5.1    arcmin  Radius    ]0,] Corrected Abell cluster radius           
  26- 27   I2      h       RAh       [0,24[ Right ascension (B1950)                
  28- 29   I2      min     RAm       [0,60[ Right ascension (B1950)                
  30- 33   F4.1    s       RAs       [0,60[ Right ascension (B1950)                
  35- 38   F4.1    s       e_RAs     ]0,] Error in right ascension                 
      40   A1      ---     DE-       [+-] Declination: sign                        
  41- 42   I2      deg     DEd       [0,90] Declination (B1950)                    
  43- 44   I2      arcmin  DEm       [0,60[ Declination (B1950)                    
  45- 46   I2      arcsec  DEs       [0,60[ Declination  (B1950)                   
  48- 50   I3      arcsec  e_DEs     ]0,] 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  MajAxi   *? [0,] Deconvolved major axis length 
  67- 68   I2      arcmin  e_MajAxi *? ]0,] Major axis error              
  70- 71   A2      ---     n_MajAxi *[ A, B, C,NR,  ] Major axis note     
  73- 74   I2      arcmin  MinAxi   *? [0,] Deconvolved minor axis        
      77   I1      arcmin  e_MinAxi *? ]0,] Minor axis error              
  79- 80   A2      ---     n_MinAxi *[ A, B, C,NR,  ] Minor axis note             
  82- 84   I3      deg     PA       *? [0,360[ Position angle 
  86- 88   I3      deg     e_PA     *? ]0,] Position angle error
  90- 93   F4.2    pc      dist-C   *? ]0,] Distance from cluster center 

Note on ID:
  An asterisk by the Abell cluster number in ID means only that the cluster 
  is outside of Abell's galactic latitude limits for completeness.

Note on Rich:
  Richness 0 clusters need not have an asterisk.
Note on zest:   
  The redshift was estimated using using the method of Corwin (1974)
  including a richness correction. 
Note on MajAxi, e_MajAxi, MinAxi, e_MinAxi, PA, and e_PA:  
  These columns contain entries for sources not included in Owen (1974) or
  for sources with new measurements. 
Note on n_MajAxi, n_MinAxi: 
  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.
Remarks and Modifications:                                          
  The original data (2 lines per source and higher accuracy parameters)
  were reformatted by Dr. 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 Hanisch, but
  can be recovered e.g. from Struble and Rood (1987) (cf. NASA ADC catalog
  A7096). Two additional columns (n_MajAxi, n_MinAxi) were added to the
  ADC version of this catalog by extracting the character fields from the
  original MajAxi and MinAxi columns, in order to avoid mixing numeric and
  character fields in the same columns. 
  This catalog was received by the Astronomical Data Center (ADC), NASA         
  Goddard Space Flight Center, from Dr. Heinz Andernach.  The data were         
  originally received by H. Andernach, on tape, from R. J. Hanisch in 1984.     
  The original ADC and CDS documentation by N.A. Oliversen and H. Andernach
  (1994) was used to create this ReadMe file.

  In column n_MinAxi the last record shows a value of 77, which is unexplained.
   Abell, G. O. 1958, ApJS, 3, 211                                              
   Corwin, H. G. 1974, AJ, 79, 1356                                             
   Owen, F. N. 1974, AJ, 79, 427                                                
   Struble, and Rood, 1987, ApJS, 63, 555                                       
(End) N.A.Oliversen [ADC], H.Andernach [CDS], C.-H.Lyu [Hughes STX]  08-Apr-1996