2021RAA....21..259L

Query : 2021RAA....21..259L

2021RAA....21..259L - Research in Astron. and astroph., 21, 259 (2021/October-0)

Intra-day variability of BL Lacertae from 2016 to 2018.

LI T., WU J.-H., MENG N.-K., DAI Y. and ZHANG X.-Y.

Abstract (from CDS):

We monitored BL Lacertae in the B, V, R and I bands for 14 nights during the period of 2016-2018. The source showed significant intra-day variability on 12 nights. We performed color-magnitude analysis and found that the source exhibited bluer-when-brighter chromatism. This bluer-when-brighter behavior is at least partly caused by the larger variation amplitude at shorter wavelengths. The variations at different wavelengths are correlated well and show no inter-band time lag.

Abstract Copyright: © 2021 National Astronomical Observatories

Journal keyword(s): galaxies: active - BL Lacertae objects: individual: BL Lacertae - galaxies: photometry

CDS comments: Fig.1 stars not identified.

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 8C 0716+714 BLL 07 21 53.4482942664 +71 20 36.363846516   15.5 15.50 14.27   ~ 1388 1
2 NAME BL Lac BLL 22 02 43.2913536816 +42 16 39.979416792   15.66 14.72     ~ 2397 1

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