BL Lac again in optical high state
Abstract
For the fourth time within one year, BL Lacertae's (ICRS coords. (ep=J2000): RA 22 02 43.291 Dec +42 16 39.978) optical brightness in increasing significantly.
- Publication:
-
The Astronomer's Telegram
- Pub Date:
- July 2021
- Bibcode:
- 2021ATel14751....1H
- Keywords:
-
- Request for Observations;
- AGN;
- Blazar;
- Quasar