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Multi-wavelength observations of PKS 2142-75 during active and quiescent gamma-ray states

journal contribution
posted on 2023-05-17, 21:57 authored by Dutka, MS, Ojha, R, Pottschmidt, K, Finke, JD, Stevens, J, Edwards, PG, Blanchard, J, James LovellJames Lovell, Nesci, R, Kadler, M, Wilms, J, Tosti, G, Pursimo, T, Krauss, F, Muller, C, Gehrels, N
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.

History

Publication title

Astrophysical Journal

Volume

779

Article number

174

Number

174

Pagination

1-8

ISSN

0004-637X

Department/School

School of Natural Sciences

Publisher

Univ Chicago Press

Place of publication

1427 E 60Th St, Chicago, USA, Il, 60637-2954

Rights statement

Copyright 2013 The American Astronomical Society

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the physical sciences

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