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Optical variability of X-ray selected blazars

Published online by Cambridge University Press:  01 August 2006

Omar M. Kurtanidze ,
Maria G. Nikolashvili ,
Givi N. Kimeridze ,
Lorand A. Sigua  and
Bidzina Z. Kapanadze
Omar M. Kurtanidze
Affiliation:
Abastumani Astrophysical Observatory, 383792 Abastumani, Georgia
Maria G. Nikolashvili
Affiliation:
Abastumani Astrophysical Observatory, 383792 Abastumani, Georgia
Givi N. Kimeridze
Affiliation:
Abastumani Astrophysical Observatory, 383792 Abastumani, Georgia
Lorand A. Sigua
Affiliation:
Abastumani Astrophysical Observatory, 383792 Abastumani, Georgia
Bidzina Z. Kapanadze
Affiliation:
Abastumani Astrophysical Observatory, 383792 Abastumani, Georgia
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Abstract

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We present optical R band photometry of nine X-ray selected BL Lac objects: 1ES 0229+200, 1ES 0323+022, 1ES 502+675, 1ES 0647+250, 1ES 0806+524, 1ES0927+500, 1ES 1028+511, 1ES 1959+650, 1ES2344+514.

Variability on long time scales within one magnitude in R band was found for all of the observed objects, except 1ES 0229+200 and 1ES0927+500. Largest variation was detected for 1ES 0502+675 and equals to 1.07 mag. Only few objects show statistically significant variation on intra-day scale.

Keywords

BL Lacertae objects – X-ray blazars – variability
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S238: Black Holes from Stars to Galaxies – Across the Range of Masses , August 2006 , pp. 399 - 400
Copyright
Copyright © International Astronomical Union 2007

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