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American Astronomical Society, Astrophysical Journal, 1(826), p. 76, 2016

DOI: 10.3847/0004-637x/826/1/76

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NuSTAR, Swift, and GROND observations of the flaring MeV blazar PMN J0641−0320

Journal article published in 2016 by M. Ajello ORCID, G. Ghisellini, V. S. Paliya ORCID, Paliya V.~S, D. Kocevski, G. Tagliaferri ORCID, G. Madejski, A. Rau, Patricia Schady ORCID, J. Greiner, F. Massaro ORCID, M. Balokovi, M. Baloković, R. Bühler, W. W. Zhang and other authors.
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

SeriesInformation ; The astrophysical journal 826(1), 76(2016). doi:10.3847/0004-637X/826/1/76 ; Abstract ; MeV blazars are a sub-population of the blazar family, exhibiting larger-than-average jet powers, accretion luminosities, and black hole masses. Because of their extremely hard X-ray continua, these objects are best studied in the X-ray domain. Here, we report on the discovery by the Fermi Large Area Telescope and subsequent follow-up observations with NuSTAR, Swift, and GROND of a new member of the MeV blazar family: PMN J0641−0320. Our optical spectroscopy provides confirmation that this is a flat-spectrum radio quasar located at a redshift of z = 1.196. Its very hard NuSTAR spectrum (power-law photon index of ~1 up to ~80 keV) indicates that the emission is produced via inverse Compton scattering off of photons coming from outside the jet. The overall spectral energy distribution of PMN J0641−0320 is typical of powerful blazars and, using a simple one-zone leptonic emission model, we infer that the emission region is located either inside the broad line region or within the dusty torus. ; Other ; Published by Univ.11032, Chicago, Ill. [u.a.]