MULTI-WAVELENGTH OBSERVATIONS OF PKS 2142-75 DURING ACTIVE AND QUIESCENT GAMMA-RAY STATES

作者：Dutka Michael S^*; Ojha Roopesh; Pottschmidt Katja; Finke Justin D; Stevens Jamie; Edwards Philip G; Blanchard Jay; Lovell James E J; Nesci Roberto; Kadler Matthias; Wilms Joern; Tosti Gino; Pursimo Tapio; Krauss Felicia; Mueller Cornelia; Gehrels Neil

来源：Astrophysical Journal, 2013, 779(2): UNSP 174.

DOI：10.1088/0004-637X/779/2/174

• galaxies: active
• gamma rays: galaxies
• quasars: individual (PKS 2142-75)
• radio continuum: galaxies
• ultraviolet: galaxies
• X-rays: individual (PKS 2142-75)

PKS 2142-75 (a.k.a. 2FGL J2147.4-7534) is a flat-spectrum radio quasar that was observed quasi-simultaneously by a suite of instruments across the electromagnetic spectrum during two flaring states in 2010 April and 2011 August as well as a quiescent state from 2011 December through 2012 January. The results of these campaigns and model spectral energy distributions (SEDs) from the active and quiescent states are presented. The SED model parameters of PKS 2142-75 indicate that the two flares of the source are created by unique physical conditions. SED studies of flat-spectrum radio quasars are beginning to indicate that there might be two types of flares, those that can be described purely by changes in the electron distribution and those that require changes in other parameters, such as the magnetic field strength or the size of the emitting region.

• 出版日期2013-12-20
• 单位CSIRO