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Large NIR flare of CGRaBS J1848+3219

ATEL # 2953; L. Carrasco, A. Carramiņana, E. Recillas, A. Porras, D.Y. Mayya, J.R Valdes, G. Escobedo, I. Torres (INAOE, Mexico)
on 19 Oct 2010; 1:58 UT
Distributed as an Instant Email Notice (Request for Observations)
Password Certification: LUIS CARRASCO (

Subjects: Radio, Infra-Red, Gamma Ray, Request for Observations, AGN, Quasars, Soft Gamma-ray Repeaters
Referred to by ATEL #: 2954

We report the ongoing NIR flare of the QSO B21846+32A, z = 0.798. It has been identified with the radio source WMAP J184840+3223 and it is also a candidate for a Gamma Ray Blazar CGRaBsJ1848+3219. In our recent observation on October 17th, 2010 (JD2455486.7358), we detected a large increase in flux at NIR wavelengths. It had then a flux corresponding to H = 12.55 +/- 0.06. While, 4 months earlier, on June 14th, 2010 (JD 2455361.9332). it had a flux corresponding to H = 16.39 +/- 0.12. That is an increase in luminosity of a factor of 34 in this lapse. Henceforth, we encourage further multiwavelength coverage for this variable source.

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