A new Giant NIR Flare of the Blazar HB89 0716+714
ATel #7268; L. Carrasco, A. Porras, E. Recillas, R. Gonzalez, V. Chavushyan, A. Carraminana (INAOE, Mexico)
on 21 Mar 2015; 16:52 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)
Subjects: Radio, Infra-Red, Optical, Gamma Ray, AGN, Blazar, Quasar
Referred to by ATel #: 8942
We report on the new NIR flare of the intermediate redshift QSO HB890716+714 (z=0.30) also known as CGRaBS J0721+7120, associated with the Gamma ray source 2FGLJ0721.9+7120. On March 14th,2015 (JD, 2457095.8120), we obtained NIR photometry for this object and found it with enhanced fluxes corresponding to J = 10.823 +/- 0.07, H = 9.995 +/- 0.03 and Ks = 9.419 +/- 0.07. While on JD 2457079.7220, we detected this object at J = 11.765 +/- 0.05, H = 10.922 +/- 0.03 and Ks = 10.158 +/- 0.04. Hence, it shows an increment of its flux by a factor of 2 in the NIR in a rather short lapse of 15 days. The object is presently brightest since the time we started monitoring it in these bands on JD2454423. The object has shown flaring activity at all wavelengths in the recent past, reported in Atels # 6902, #6944, #6953, #6957, #6999, #7026 Our observations were 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.