Definition of the galaxy sample

The sample from which WHISP candidates are being selected consists of galaxies in the Uppsala General Catalogue of Galaxies (Nilson 1973) with This sample comprises 3148 galaxies in total.

A subsample of 200 galaxies with presently serves as the main observing list for WHISP. Galaxies satisfying these selection criteria generally have redshifts less than 2000 km/s.