BZBJ1058+5628: a new quasi-periodic BL Lac
arXiv:1004.0239 · doi:10.1088/0004-6256/139/6/2425
Abstract
We present the historic photographic light curves of three little known Blazars (two BL Lacs and one FSRQ), BZB J1058+5628, BZQ J1148+5254 and BZB J1209+4119 spanning a time interval of about 50 years, mostly built using the Asiago plate archive. All objects show evident long-term variability, over which short-term variations are superposed. One source, BZB J1058+5628, showed a marked quasi-periodic variability of 1 mag on time scale of about 6.3 years, making it one of the few BL Lac objects with a quasi-periodic behavior.
Accepted by The Astronomical Journal; 7 figures; 7 tables
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