Light curve of on 231 in the period 1969-1976
Abstract:A light curve of the BL Lac-type object ON 231 in the period from 1969 to 1976 is presented. Our photometric data enlarge by a factor of 2 the existing data on this object. Variability on the time scale of minutes is suspected.
Document Type: Research Article
Publication date: April 1, 2004