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A Large NIR flare of the quasar PKS2023-07

ATel #10882; L. Carrasco, R. Gonzalez, E. Recillas, A. Porras, V. Chavushyan, D. Y. Mayya, M. Newman (INAOE, Mexico)
on 23 Oct 2017; 15:14 UT
Distributed as an Instant Email Notice Transients
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)

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

We report on a NIR flare of the high redshift QSO (z=1.388) BZQJ2025-0735 cross identified with the radio source PKS2023-07 and the Gamma-ray source 3FGLJ2025.6-0736 On September 29th,2017 MJD(2458025.7054), we found the source with NIR fluxes corresponding to J = 14.468 +/- 0.04, H = 13.673 +/- 0.05 and Ks = 12.601+/- 0.07. While, on MJD 2457936.97 the flux in the H band corresponded to H = 15.472 +/- 0.05. Hence, the source has increased its flux by a factor of 5 in this short lapse. The source is brightest since the time we started monitoring it on MJD 2457497. 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.