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NIR brightening of the blazar B3 2247+381

ATEL # 2923; L. Carrasco, A. Carramiņana, E. Recillas, A. Porras, D.Y. Mayya, J.R Valdes, G. Escobedo, I. Torres (INAOE, Mexico)
on 11 Oct 2010; 12:10 UT
Distributed as an Instant Email Notice (Request for Observations)
Password Certification: LUIS CARRASCO (

Subjects: Radio, Far-Infra-Red, Infra-Red, Gamma Ray, Request for Observations, AGN, Quasars

Prompted by the The MAGIC Collaboration discovery of VHE (>100Gev) Gamma Ray emission of the blazar B3 2247+381 (1FGL J2250.1+3825) reported in ATEL #2910. We have carried out NIR photometry on the object. Our observations on October 9th,2010 (JD 2455478.776080), yielded the following values: H = 13.51 +/- 0.05, J = 14.12 +/- 0.06 and Ks = 12.84 +/- 0.09. Comparing these values with the 2MASS published photometry for the object. We detect an enhanced flux at NIR wavelengths of a factor ~ 1.8, with respect to the latter. We are following the object behavior closely. We encourage further multi-wavelength observations.

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