Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1779233 | New Astronomy | 2009 | 9 Pages |
Abstract
We report the first results of quasi-simultaneous two passband optical monitoring of six quasi-stellar objects to search for micro-variability. We carried out photometric monitoring of these sources in an alternating sequence of R and V passbands, for five radio-quiet quasi-stellar objects (RQQSOs), 0748Â +Â 291, 0824Â +Â 098, 0832Â +Â 251, 1101Â +Â 319, 1225Â +Â 317 and one radio-loud quasi-stellar object (RLQSO), 1410Â +Â 429. No micro-variability was detected in any of the RQQSOs, but convincing micro-variability was detected in the RLQSO on two successive nights it was observed. Using the compiled data of optical micro-variability of RQQSOs till date, we got the duty cycle for micro-variability in RQQSOs is â¼10%. The present investigation indicates that micro-variability is not a persistent property of RQQSOs but an occasional incident.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Astronomy and Astrophysics
Authors
Alok C. Gupta, Weimin Yuan,