MULTI-WAVELENGTH OBSERVATIONS OF PKS 2142−75 DURING ACTIVE AND QUIESCENT GAMMA-RAY STATES
| dc.contributor.author | Dutka, Michael S. | |
| dc.contributor.author | Ojha, Roopesh | |
| dc.contributor.author | Pottschmidt, Katja | |
| dc.contributor.author | Finke, Justin D. | |
| dc.contributor.author | Stevens, Jamie | |
| dc.contributor.author | Edwards, Philip G. | |
| dc.contributor.author | Blanchard, Jay | |
| dc.contributor.author | Lovell, James E. J. | |
| dc.contributor.author | Nesci, Roberto | |
| dc.contributor.author | Kadler, Matthias | |
| dc.contributor.author | Wilms, Joern | |
| dc.contributor.author | Tosti, Gino | |
| dc.contributor.author | Pursimo, Tapio | |
| dc.contributor.author | Krauss, Felicia | |
| dc.contributor.author | Müller, Cornelia | |
| dc.contributor.author | Gehrels, Neil | |
| dc.date.accessioned | 2023-09-07T14:14:22Z | |
| dc.date.available | 2023-09-07T14:14:22Z | |
| dc.date.issued | 2013-12-04 | |
| dc.description.abstract | 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. | en_US |
| dc.description.sponsorship | We thank the Swift team for scheduling our Target of Opportunity requests. This research was funded in part by NASA through Fermi Guest Investigator grants NNH09ZDA001N and NNH10ZDA001N. This research was supported by an appointment to the NASA Postdoctoral Program at the Goddard Space Flight Center, administered by Oak Ridge Associated Universities through a contract with NASA. This publication makes use of data products from the Wide-Field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. The Australia Telescope Compact Array is part of the Australia Telescope National Facility, which is funded by the Commonwealth of Australia for operation as a National Facility managed by CSIRO. This research has made use of data from the NASA/IPAC Extragalactic Database (NED), operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration; and the SIMBAD database (operated at CDS, Strasbourg, France). This research has made use of NASA's Astrophysics Data System. This research has made use of the United States Naval Observatory (USNO) Radio Reference Frame Image Database (RRFID). This article has made use of up-to-date SMARTS optical/near-infrared light curves that are available at www.astro.yale.edu/smarts/glast/home.php. | en_US |
| dc.description.uri | https://iopscience.iop.org/article/10.1088/0004-637X/779/2/174 | en_US |
| dc.format.extent | 8 pages | en_US |
| dc.genre | journal articles | en_US |
| dc.identifier | doi:10.13016/m2b14o-m99t | |
| dc.identifier.citation | Dutka, Michael S., Roopesh Ojha, Katja Pottschmidt, Justin D. Finke, Jamie Stevens, Philip G. Edwards, Jay Blanchard, et al. “Multi-Wavelength Observations of PKS 2142−75 During Active and Quiescent Gamma-Ray States.” The Astrophysical Journal 779, no. 2 (December 2013): 174. https://doi.org/10.1088/0004-637X/779/2/174. | en_US |
| dc.identifier.uri | https://doi.org/10.1088/0004-637X/779/2/174 | |
| dc.identifier.uri | http://hdl.handle.net/11603/29604 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | IOP Publishing | en_US |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Center for Space Sciences and Technology | |
| dc.relation.ispartof | UMBC Physics Department | |
| dc.relation.ispartof | UMBC Faculty Collection | |
| dc.rights | This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law. | en_US |
| dc.rights | Public Domain Mark 1.0 | * |
| dc.rights.uri | http://creativecommons.org/publicdomain/mark/1.0/ | * |
| dc.title | MULTI-WAVELENGTH OBSERVATIONS OF PKS 2142−75 DURING ACTIVE AND QUIESCENT GAMMA-RAY STATES | en_US |
| dc.type | Text | en_US |
| dcterms.creator | https://orcid.org/0000-0002-4656-6881 | en_US |