An H alpha catalogue of galaxies in Hickson compact groups I. The sample

We present H-alpha photometry for a sample of 95 galaxies in Hickson Compac t Groups obtained from observations of 31 groups. The Catalogue lists isoph otal and adaptive aperture (Kron aperture) flux measurements for about 75% of the accordant galaxies inside the observed HCGs, 22 out of which are upp er limits. Non standard data reduction procedures have been used to obtain the continuum subtracted H-alpha images for each HCG of the target sample. Flux calibration has also been performed in order to obtain H-alpha luminos ities for the whole sample. Both the data reduction and calibration procedu res are carefully described in this paper. The new data listed in this Cata logue are of great importance in understanding the star formation rate insi de HCG galaxies and in giving new insights on its dependence on galaxy inte ractions.