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NIR Flaring of BL Lac

ATel #3375; L. Carrasco, A. Carraminana, G. Escobedo, E. Recillas, A. Porras, D. Y. Mayya. (INAOE, Mexico)
on 24 May 2011; 05:51 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)

Subjects: Radio, Millimeter, Infra-Red, Optical, Gamma Ray, TeV, VHE, UHE, AGN, Blazar, Quasar

Referred to by ATel #: 3377, 3380, 3459

Following the Fermi LAT report (ATel#3368) of increased activity of BL Lac. We carried out NIR Photometry of this object and found on May,23rd, 2011 (JD 2455704.991690) that the object was indeed brighter (H = 10.08 +/- 0.06) than our previous determination on JD 2455575.609653 when it had a flux corresponding to H = 11.439 +/- 0.05. This is consistent with the increase in flux in the optical reported in ATel #3371.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 encourage further multi wavelength coverage.