Multi-band behaviour of the TeV blazar PG 1553+113 in optical range on diverse timescales. Flux and spectral variations
Abstract
Context. The TeV BL Lac object
Aims: We study the flux and spectral variability of
Methods: We analysed the light curves using various statistical tests, fitting and cross-correlation techniques, and methods for the search for periodicity. We examined the colour-magnitude diagrams before and after the corresponding light curves were corrected for the long-term variations.
Results: Our intra-night monitoring, supplemented with literature data, result in a low duty cycle of ∼(10-18)%. In April 2019, we recorded a flare, which marks the brightest state of
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- January 2021
- DOI:
- 10.1051/0004-6361/202039301
- arXiv:
- arXiv:2011.04074
- Bibcode:
- 2021A&A...645A.137A
- Keywords:
-
- galaxies: general;
- galaxies: active;
- BL Lacertae objects: general;
- BL Lacertae objects: individual: PG 1553+113;
- Astrophysics - High Energy Astrophysical Phenomena;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 21 pages, 22 figures, accepted for publication in A&