The catalogue, available in electronic form alone at the CDS (Centre de
Données Astronomiques de Strasbourg), presents the following
entries for all objects in both regions of observation (the large central
zone and the smaller south-west area - see Fig. 1 (click here)):
(1, 2, 3) Right ascension (1950).
(4, 5, 6) Declination (1950).
(7) Isophotal radius 
in arcsec.
(8) Central surface brightness 
in 
.
(9) Isophotal apparent magnitude 
.
(10) Magnitude error (in modulus), as estimated by Eq. (2 (click here)).
(11) Classification of the object: 
star, 
galaxy.
(12) GMP number, when available. The letter after the number indicates the GMP
catalogue used for the matching: g stands for the GMP (1983) galaxy
catalogue, while s stands for the GMP unpublished star catalogue. The
correspondance was obtained by cross-correlating positions. Do notice there
are inevitable ambiguities in this cross-identification, possibly due to non
resolution of close objects by GMP or simply to confusion when several close
neighbours exist. That is why there are 4 entries doubled (because each one
of those 4 objects was identified with 2 different GMP objects: 3325g, 3336g,
2976g, 2980g, 4068g, 4075g and 4032s, 4042s). In addition, there are also
several other entries which are attributed the same GMP number. We thus
caution the reader/potential user of this catalogue to beware not to use these
data directly without taking into account this information.
(13, 14) GMP (
) coordinates in arcsec (after slight correction to match GSC
positions, as described in Sect. 5 (click here)).
(15) Heliocentric radial velocity in km s
, when available, as given by
Biviano et al. (1995).
Some of the results derived from the analysis of this catalogue are discussed in Lobo et al. 1996 (in press), Gerbal et al. 1996 (submitted) and the corresponding available spectral data is published by Biviano et al. (1995).
Acknowledgements
We thank Stéphane Arnouts, Isabel Márquez, Cláudia Mendes de Oliveira and Christopher Willmer for useful discussions on photometry; Francois Sèvre, José Donas and Roland den Hartog for astrometric discussions, and also J.G. Godwin, N. Metcalfe & J.V. Peach for providing us with their unpublished catalogue of stellar objects in the Coma field. We would also like to thank the referee, G. Gavazzi, for helpful comments on the text. We acknowledge financial support from GDR Cosmologie, CNRS; CL is fully supported by the BD/2772/93RM grant attributed by JNICT, Portugal.