Speaker
Description
We present the results of a preliminary investigation of a potential association of a blazar candidate behind the Large Magellanic Cloud (LMC) and a gamma-ray transient object. The indication of gamma-ray flaring activity in the Fermi-LAT data was detected at the position (RA, decl.) ∼(86.60 deg,-69.02 deg), while the J0545-6846 blazar candidate is located at (RA, decl.) = (86.47 deg, -68.77 deg). J0545-6846 is characterised by a particularly large radio flux of 176.3 mJy at 843 MHz, a high value of the radio-loudness parameter R=6900, and an integrated gamma-ray flux >1 GeV of ∼9.6 × 10^(-12) erg cm^(-2) s^(-1). We have analysed the Fermi-Large Area Telescope (LAT) data from the LMC region in order to verify the flaring activity detected in July/August 2008 and later in April 2015 at MeV and GeV energies, using the latest Fermi-LAT point source catalogue. The unbinned maximum likelihood analysis performed took into account the positions of all known point-like sources, diffuse emission as well as the advanced gas modelling from the region investigated. Our preliminary analyses indicate positional consistency between J0545-6846 and the flaring activity in both periods. This suggests that the observed transient activities are related to the same blazar.
