Multiwavelength activity of the gamma-ray blazar PKS 2233-148
Author(s)
Date Issued
2012-06-01
Mission(s)
Other
Abstract
On 2012 June 4, the BL Lac-type blazar PKS 2233-148 showed a gamma-ray flare detected by Fermi/LAT and AGILE (ATel #4152, #4154). Preliminary analysis of further Fermi/LAT observations indicates continued gamma-ray activity of the source reaching the peak daily flux of (3.2+/-0.4)x10^-6 ph/cm^2/sec (E>100 MeV) on June 20 (estimated error is statistical only). Radio observations with the Australia Telescope Compact Array (ATCA) on June 25 21h UT show the elevated flux density levels compared to previous ATCA, VLA, and RATAN-600 observations at 9.0 GHz, a flux density S = 1.0 Jy and spectral index (across the 2 GHz bandwidth) a = 0.4 (S ~ nu^+a), at 19 GHz S = 1.3 Jy and a = 0.2, at 40 GHz S = 1.5 Jy and a = -0.1.