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The recent NIR Flare of the Blazar 3C279

ATel #11256; L. Carrasco, E. Recillas, A. Porras, G. Escobedo, V. Chavushyan (INAOE, Mexico)
on 4 Feb 2018; 21:03 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)

Subjects: Radio, Infra-Red, Optical, Gamma Ray, AGN, Blazar, Quasar, Transient

In our monitoring campaign of AGNs we found the Blazar 3C279 flaring in the NIR on January 27th,2018. this source is cross identified with the quasar HB891253-055 and the Gamma-ray source 3FGLJ1256.1-054. On MJD 2458145.9895, we found the source with NIR fluxes corresponding to J = 12.584 +/- 0.03, H = 11.747 +/- 0.04 and Ks = 10.930 +/- 0.05. While, on MJD 2458124.061 the fluxes in the NIR bands corresponded to J = 13.556 +/- 0.07, H = 12.651 +/- 0.05 and K = 11.870 +/- 0.07. Hence, the source has increased its flux by a factor of 2.5 in the K band in this this rather short lapse. The source is brightest since the time we started monitoring it on MJD 2454508. 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 encourage further multi wavelength coverage.