NIR flaring of the QSO B21144+40
ATel #4220; L. Carrasco, G. Escobedo, D. Y. Mayya, A. Porras, E. Recillas, A. Carraminana, (INAOE, Mexico)
on 27 Jun 2012; 18:04 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)
Subjects: Request for Observations, AGN, Quasar
As part of a monitoring program of potential Gamma Ray sources detected by Fermi LAT. We have observed a NIR brightening of the radio source B21144+40 cross identified with BZQ J1146+3958 a high redshift QSO (z=1.088). From observations on June 18th 2012, epoch JD2456096.69427 and earlier on epoch JD246076.7947, we determine the flux in the H band to be 14.410 +/- 0.04 and 15.453 +/- 0.07 respectively. It is then, rising in the NIR. An increase in flux of 1 mag in about 20 days is reported here. From data for previous flares it is known that this object reaches flux levels at least a factor of 10 larger than the one reported here. Hence, we encourage further multi wavelength coverage. Observations were 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.
