Extensive near-infrared (H-band) photometry in Coma^*

¹ Osservatorio Astronomico di Capodimonte, via Moiariello 16, 80131 Napoli, Italy
² Observatoire Midi-Pyrénées, LAT, UMR 5572, 14 Av. E. Belin, F-31400 Toulouse, France e-mail: roser,davoust,poulain@obs-mip.fr
³ Departament d'Astronomia i Meteorologia, Marti i Franquès 1, 08028 Barcelona, Spain

Received: 16 June 1999
Accepted: 6 October 1999

Abstract


We present extensive and accurate photometry in the near-infrared H band of a complete sample of objects in an area of about 400 arcmin² toward the Coma cluster of galaxies. The sample, including about 300 objects, is complete down to mag, the exact value depending on the type of magnitude (isophotal, aperture, Kron) and the particular region studied. This is six magnitudes below the characteristic magnitude of galaxies, well into the dwarfs' regime at the distance of the Coma cluster. For each object (star or galaxy) we provide aperture magnitudes computed within five different apertures, the magnitude within the 22 mag arcsec^-2 isophote, the Kron magnitude and radius, magnitude errors, as well as the coordinates, the isophotal area, and a stellarity index. Photometric errors are 0.2 mag at the completness limit. This sample is meant to be the zero-redshift reference for evolutionary studies of galaxies.