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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, NPKS 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 JournalVolume
779Article number
174Number
174Pagination
1-8ISSN
0004-637XDepartment/School
School of Natural SciencesPublisher
Univ Chicago PressPlace of publication
1427 E 60Th St, Chicago, USA, Il, 60637-2954Rights statement
Copyright 2013 The American Astronomical SocietyRepository Status
- Restricted