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- W2971953018 abstract "The aim of our observations is to investigate the intranight variability properties and the spectral variability of BL Lacertae. 799 optical multi-band observations were intensively made with the Beijing-Arizona-Taiwan-Connecticut (BATC) 60/90cm Schmidt telescope during the outburst composed of two subsequent flares in 2005. The second flare, whose rising phase lasted at least 44 days, was observed with amplitudes of more than 1.1 mag in three BATC optical bands. In general, on intranight timescale the amplitude of variability and the variation rate are larger at the shorter wavelength, and the variation rate is comparable in the rising and decaying phases within each band. A possible time lag between the light curves in bands e and m, around 11.6 minutes, was obtained. Based on the analysis of the colour index variation with the source brightness, the variability of BL Lacertae can be interpreted as having two components: a strongly-chromatic intranight component and a mildly-chromatic internight component, which may be the results of both intrinsic physical mechanism and geometric effects." @default.
- W2971953018 created "2019-09-12" @default.
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- W2971953018 date "2019-09-03" @default.
- W2971953018 modified "2023-10-18" @default.
- W2971953018 title "Optical multi-band observations of BL Lacertae during the outburst of 2005. (arXiv:astro-ph/0701129v1 CROSS LISTED)" @default.
- W2971953018 hasPublicationYear "2019" @default.
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