Previous studies of blazars and unidentified objects observed by EGRET have shown strong evidence for variability over a timescale of months and years. In addition, several extraordinary blazars are known to vary in gamma-rays over several days, and possibly within a day. For the first time, we are conducting a systematic search for short timescale variability over the entire EGRET database available for general public use. This paper will focus on the first results for blazars and high-galactic latitude unidentified sources. A preliminary analysis of the EGRET gamma-ray data from 30 viewing periods shows that several sources may be variable on short timescales. The best case can be made for the BL Lac object 0521-365, which appears to have had a 1-2 day flare during July 1994. The quasar PKS 0208-512 and the unidentified object 2EG 1835+592 also display possible varibility on 2 day timescales.
American Astronomical Society Meeting Abstracts #190
- Pub Date:
- May 1997