The timescales of the optical variability of blazars. III - OJ 287 and BL Lacertae

Abstract

view Abstract Citations (138) References (44) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Timescales of the Optical Variability of Blazars. III. OJ 287 and BL Lacertae Carini, M. T. ; Miller, H. R. ; Noble, J. C. ; Goodrich, B. D. Abstract The BL Lacertae objects OJ 287 and BL Lac have been photometrically monitored in an effort to study the nature of optical variations which may occur on timescales ranging from years to less than a day. The results of ten years of photometric monitoring of these two objects show variations which are consistent with those reported by other authors. No strong dependence of color with source brightness was detected, although both sources exhibited a weak tendency to be bluer when brighter. Microvariability was observed for both objects; variations as large as 0.1 mag/hr were observed for BL Lac and changes as large as 0.08 mag/hr were observed for OJ 287. No evidence for a periodicity was found in the observed variations of either object. Publication: The Astronomical Journal Pub Date: July 1992 DOI: 10.1086/116217 Bibcode: 1992AJ....104...15C Keywords: Astronomical Photometry; Bl Lacertae Objects; Blazars; Charge Coupled Devices; Active Galactic Nuclei; Power Spectra; Telescopes; Astrophysics; GALAXIES: ACTIVE; BL LACERTAE OBJECTS: GENERAL; GALAXIES: NUCLEI full text sources ADS | data products SIMBAD (3) NED (2) Related Materials (4) Part 1: 1990AJ....100..347C Part 2: 1991AJ....101.1196C Part 4: 1997AJ....113.1995N Part 5: 1998AJ....116.2667C