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NIR flaring and fast changes in luminosity of the source 2mass20011286+4352529

ATEL # 2930; L. Carrasco, A. Carramiņana, E. Recillas, A. Porras, D.Y. Mayya, J.R Valdes, G. Escobedo, I. Torres (INAOE, Mexico)
on 13 Oct 2010; 5:51 UT
Distributed as an Instant Email Notice (Request for Observations)
Password Certification: LUIS CARRASCO (carrasco@inaoep.mx)

Subjects: Request for Observations, AGN, Quasars

We have detected a significant brightening of 2mass20011286+4352529 with respect to the photometry published in the 2MASS survey. This object is associated to the radio source MG4 J200112+4352 and the Gamma ray source 1FGLJ2001.1+4351. The Magic Collaboration detected VHE Gamma ray emission from this object (ATEL # 2756). We have monitored the source the last few weeks and found that, its luminosity changes by factors ~2 in time scales of 10 days. On Sept 15th,2010 (JD2455454.7516) we measured a flux corresponding to H = 12.57 +/- 0.05, a factor of 4 brighter than the 2MASS epoch when its flux corresponded to H = 14.156 +/- 0.06. Yet on JD2455468.72413 it fainted to a value of H = 13.04 +/-0.03. While on JD 2455477.707838 was back to H = 12.57 +/- 0.04. Due its extreme present day variability, we encourage further multi-wavelength observations.


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