Back to Volume
Paper: VSOP Observations of the Gamma-Ray Sources J1733−1304, J1625−2527, and J1015+4926
Volume: 402, Approaching Micro-Arcsecond Resolution with VSOP-2: Astrophysics and Technologies
Page: 112
Authors: Nakagawa, A.; Murata, Y.; Edwards, P.G.; Wajima, K.; Omodaka, T.
Abstract: We present results from VSOP and VLBA observations of the active galactic nuclei J1733−1304, J1625−2527, and J1015+4926. These sources have been identified as possible counterparts to gamma-ray sources in the third EGRET catalog. In general, the counterparts to extragalactic EGRET sources have very compact structure, with brightness temperatures (Tb) greater than 1011-1012K. We compare the images of the three sources with previously published images and also examine jet motions and spectral indices. The measured Tb of J1733−1304 are an order of magnitude lower than those of previous measurements, suggesting the VSOP observations were made while the source was in a relatively quiescent state. The relatively low Tb of J1625−2527 is also consistent with the highly variable nature of this source. A comparison of the VSOP observation of J1015+4926 with a VLBA image suggests the existence of stationary jet components.
Back to Volume