A descriptive title
ATel #12645; L. Carrasco, E. Recillas, A. Porras, G. Escobedo, V. Chavushyan (INAOE, Mexico)
on 9 Apr 2019; 17:43 UT
Credential Certification: LUIS CARRASCO (carrasco@inaoep.mx)
Subjects: Radio, Infra-Red, Gamma Ray, AGN, Blazar, Quasar
We call attention on our recent NIR observation of the Blazar PG1553+113 cross identified with the Gamma Ray source 1ES1553+113 also known as 2FGL1555.7+11.11. On April 2nd,2019 (JD2458575.96897), we found the flux of the object to correspond to H = 11.559 +/- 0.04. While on MJD 2458388, the source flux corresponded to H = 12.01 +/- 0.04. Hence, the source flux has increased by a factor of 1.5, a significant increase in luminosity in this lapse. These observations are previous to the recently reported optical flare detected by ATOM (ATel #12631). The observed luminosity changes imply that the
object was already in a rising event in the NIR at least 3 days before the optical flare. Our observations are carried out with the 2.1m telescope of the Guillermo Haro Observatory operated by the National Institute for Astrophysics, Optics & Electronics (Mexico), equipped with the instrument CANICA a NIR camera. We encourage further multi-wavelength coverage.
