Long-term optical behavior of 144 compact extragalactic objects - 1969-1988

Abstract

Photometric data are reported for 144 extragalactic sources observed during a 19 yr program of photographic monitoring. An additional 22 objects that were classified as optically violent variables (OVVs) have been discussed by Webb et al. (1988). The present paper summarizes results for the generally less active sources not included in that earlier publication. Of these, 92 exhibited optical variations at a confidence level of 95% or more. Light curves are presented for 25 of the more interesting objects, three of which displayed OVV activity in the Florida records; another five sources underwent one or more events that approach the OVV level.

Identifiers

DOI

10.1086/114875

Citations and references