NIR brightening of the blazar S41749+70
ATel #3234; L. Carrasco, A. Carraminana, G. Escobedo, A. Porras, E. Recillas, Y. D. Mayya (INAOE, Mexico)
on 24 Mar 2011; 14:01 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)
Subjects: Radio, Infra-Red, Optical, Gamma Ray, >GeV, Request for Observations, AGN, Blazar, Quasar
Following the report of the AGILE detection of the Gamma Ray brightening of a source in the region containing the blazar S41749+70 (Lucarelli, et al 2011,Atel#3199). We carried out NIR observations of this source, we now report the ongoing NIR flare of the z=0.770 blazar (HB891749+701) also known as CGRaBSJ1748+7005. On March 14th,2011 JD2455635.0055, we detected a strong NIR source coincident with the radio position, we determined the flux from this object to correspond to H = 13.141 +/- 0.04. That is 1.4 mag brighter than our previous observations on JD2455360.9598, when we determined its flux in H = 14.557 +/- 0.04. Henceforth, this blazar has had a significant increase in flux (a factor of 3.5) during the lapse of our monitoring program. This fact renders further support to the association of the brightening in Gamma rays detected by AGILE with the radio and NIR source. Our photometry was carried out with the 2.1m telescope of the Guillermo Haro Observatory of the National Institute for Astrophysics, Optics and Electronics (Mexico), equipped with the instrument CANICA a NIR camera. We encourage further multi wavelength coverage.
