2019PASP..131g4102Z -
Publ. Astron. Soc. Pac., 131, part no 7, 4102-74102 (2019/July-0)
Minute-scale rapid variability of Mrk 501 by multi-band photometric monitoring from 2010 to 2017.
ZENG W., HU W., ZHANG G.-M., WEN T., YANG S.-B., GENG X.-F., WU X.-H., ZHOU X.-Z. and DAI B.-Z.
Abstract (from CDS):
Mrk 501 is one of our long-term photometric monitoring objects with the optical telescopes at Yunnan Astronomical Observatory (YAO). In this work, observations were performed from 2010 March 11 to 2017 June 7 in the BVRI bands. We detected minute-scale rapid variabilities in the optical multi-band light curves. Durations of these rapid variabilities are from 5 to 77 minutes. The minimal decay timescale is about 3 minutes (2.330 ± 1.572 minutes on 2012 May 22 and 3.172 ± 1.626 minutes on 2017 May 20). After subtracting the host-galaxy component, The minimal decay timescale was about 8 minutes on 2017 June 3, and the corresponding duration is about 10 minutes. This fast variability requires the strength of the co-moving magnetic field in the jet larger than 38.60 G (19.69 G for corrected results, with Doppler factor δD ∼ 3). The discrete correlation function (DCF) analysis between B and I band short-term light curves show significant correlated variability; however, no significant time lags are detected. The color-magnitude variation shows significant negative correlation on intranight timescales, which is due to the superposition of multiple components.
Abstract Copyright:
© 2019. The Astronomical Society of the Pacific. All rights reserved.
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