NIR brightening of BL Lac
ATel #8311; L. Carrasco, E. Recillas, A. Porras, V. Chavushyan, A. Carraminana (INAOE, Mexico)
on 20 Nov 2015; 09:01 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)
Subjects: Radio, Infra-Red, Gamma Ray, TeV, VHE, AGN, Blazar
We report on the recent NIR brightening of BL Lac, identified with the gamma-ray source 2FGLJ2202.8+4216. On November 1st,2015 (MJD 2457327.71), we found the source with the following fluxes in the NIR: J= 11.066 +/- 0.03, H = 10.085 +/- 0.04 and Ks = 9.113 +/- 0,05. These are to be compared with our previous observation on MJD 2457297.86, when the source flux corresponded to J = 11.539 +/- 0.03, H = 10.626 +/- 0.04 and Ks = 10.213 +/- 0.04 . Hence the source has had a flux increment of a factor 2.3 in this lapse. This source has shown flaring activity in the past (see ATEL #6572). Our observations are carried out with the 2.1m telescope of the Guillermo Haro Observatory operated by the National Institute for Astrophysics, Optics and Electronics (Mexico), equipped with the instrument CANICA a NIR camera. We strongly encourage further multiwavelength coverage.
