Intra-day variability of BL Lacertae from 2016 to 2018
Abstract
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.
- Publication:
-
Research in Astronomy and Astrophysics
- Pub Date:
- November 2021
- DOI:
- 10.1088/1674-4527/21/10/259
- arXiv:
- arXiv:2108.04699
- Bibcode:
- 2021RAA....21..259L
- Keywords:
-
- galaxies: active;
- BL Lacertae objects: individual: BL Lacertae;
- galaxies: photometry;
- Astrophysics - Astrophysics of Galaxies;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- doi:10.1088/1674-4527/21/10/259