Optical Photometry of X-ray Selected Blazars

Physics

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Scientific paper

We present optical R band photometry for nine X-ray EMMS BL Lac objects: 1ES 0229+200, 1ES 0323+022, 1ES 0502+675, 1ES 0647+250, 1ES 0806+524, 1ES 0927+500, 1ES 1028+511, 1ES 1959+650, 1ES 2344+514. They have been observed with ST-6 CCD camera attached to Newtonian focus of the 70-cm meniscus telescope. These data provide optical information on sources that have been rarely observed in the optical band. 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 observed for 1ES 0502+675 and equals to 1.07 mag in R band.

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