NuSTAR, Swift, and GROND Observations of the Flaring MeV Blazar PMN J0641-0320

M. Ajello, G. Ghisellini, V.~S. Paliya, D. Kocevski, G. Tagliaferri, G. Madejski, A. Rau, P. Schady, J. Greiner, F. Massaro, M. Balokovi, R. Bühler, M. Giomi, L. Marcotulli, F. D'Ammando, D. Stern, S.~E. Boggs, F.~E. Christensen, W.~W. Craig, C.~J. Hailey & 2 others F.~A. Harrison, W.~W. Zhang

Research output: Contribution to journalArticle

11 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)76
Number of pages1
JournalAstrophysical Journal
Volume826
Issue number1
DOIs
Publication statusPublished - 22 Jul 2016

Keywords

  • galaxies: active, quasars: general, quasars: individual: PMN J0641─0320, X-rays: general, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Cosmology and Nongalactic Astrophysics

Cite this

Ajello, M., Ghisellini, G., Paliya, V. S., Kocevski, D., Tagliaferri, G., Madejski, G., ... Zhang, W. W. (2016). NuSTAR, Swift, and GROND Observations of the Flaring MeV Blazar PMN J0641-0320. Astrophysical Journal, 826(1), 76. https://doi.org/10.3847/0004-637X/826/1/76

NuSTAR, Swift, and GROND Observations of the Flaring MeV Blazar PMN J0641-0320. / Ajello, M.; Ghisellini, G.; Paliya, V.~S.; Kocevski, D.; Tagliaferri, G.; Madejski, G.; Rau, A.; Schady, P.; Greiner, J.; Massaro, F.; Balokovi, M.; Bühler, R.; Giomi, M.; Marcotulli, L.; D'Ammando, F.; Stern, D.; Boggs, S.~E.; Christensen, F.~E.; Craig, W.~W.; Hailey, C.~J.; Harrison, F.~A.; Zhang, W.~W.

In: Astrophysical Journal, Vol. 826, No. 1, 22.07.2016, p. 76.

Research output: Contribution to journalArticle

Ajello, M, Ghisellini, G, Paliya, VS, Kocevski, D, Tagliaferri, G, Madejski, G, Rau, A, Schady, P, Greiner, J, Massaro, F, Balokovi, M, Bühler, R, Giomi, M, Marcotulli, L, D'Ammando, F, Stern, D, Boggs, SE, Christensen, FE, Craig, WW, Hailey, CJ, Harrison, FA & Zhang, WW 2016, 'NuSTAR, Swift, and GROND Observations of the Flaring MeV Blazar PMN J0641-0320', Astrophysical Journal, vol. 826, no. 1, pp. 76. https://doi.org/10.3847/0004-637X/826/1/76
Ajello M, Ghisellini G, Paliya VS, Kocevski D, Tagliaferri G, Madejski G et al. NuSTAR, Swift, and GROND Observations of the Flaring MeV Blazar PMN J0641-0320. Astrophysical Journal. 2016 Jul 22;826(1):76. https://doi.org/10.3847/0004-637X/826/1/76
Ajello, M. ; Ghisellini, G. ; Paliya, V.~S. ; Kocevski, D. ; Tagliaferri, G. ; Madejski, G. ; Rau, A. ; Schady, P. ; Greiner, J. ; Massaro, F. ; Balokovi, M. ; Bühler, R. ; Giomi, M. ; Marcotulli, L. ; D'Ammando, F. ; Stern, D. ; Boggs, S.~E. ; Christensen, F.~E. ; Craig, W.~W. ; Hailey, C.~J. ; Harrison, F.~A. ; Zhang, W.~W. / NuSTAR, Swift, and GROND Observations of the Flaring MeV Blazar PMN J0641-0320. In: Astrophysical Journal. 2016 ; Vol. 826, No. 1. pp. 76.
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AB - 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.

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