NuSTAR Detection of the Blazar B2 1023+25 at Redshift 5.3

T. Sbarrato; G. Tagliaferri; G. Ghisellini; M. Perri; S. Puccetti; M. Balokovi; M. Nardini; D. Stern; S.~E. Boggs; W.~N. Brandt; F.~E. Christensen; P. Giommi; J. Greiner; C.~J. Hailey; F.~A. Harrison; T. Hovatta; G.~M. Madejski; A. Rau; P. Schady; V. Sudilovsky; C.~M. Urry; W.~W. Zhang

doi:10.1088/0004-637X/777/2/147

NuSTAR Detection of the Blazar B2 1023+25 at Redshift 5.3

T. Sbarrato, G. Tagliaferri, G. Ghisellini, M. Perri, S. Puccetti, M. Balokovi, M. Nardini, D. Stern, S.~E. Boggs, W.~N. Brandt, F.~E. Christensen, P. Giommi, J. Greiner, C.~J. Hailey, F.~A. Harrison, T. Hovatta, G.~M. Madejski, A. Rau, P. Schady, V. SudilovskyC.~M. Urry, W.~W. Zhang

Department of Physics

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36 Citations (SciVal)

Abstract

B2 1023+25 is an extremely radio-loud quasar at z = 5.3 that was first identified as a likely high-redshift blazar candidate in the SDSS+FIRST quasar catalog. Here, we use the Nuclear Spectroscopic Telescope Array (NuSTAR) to investigate its non-thermal jet emission, whose high-energy component we detected in the hard X-ray energy band. The X-ray flux is (5-10 keV) and the photon spectral index is ΓX 1.3-1.6. Modeling the full spectral energy distribution, we find that the jet is oriented close to the line of sight, with a viewing angle of ~3°, and has significant Doppler boosting, with a large bulk Lorentz factor ~13, which confirms the identification of B2 1023+25 as a blazar. B2 1023+25 is the first object at redshift larger than 5 detected by NuSTAR, demonstrating the ability of NuSTAR to investigate the early X-ray universe and to study extremely active supermassive black holes located at very high redshift.

Original language	English
Pages (from-to)	147
Number of pages	1
Journal	Astrophysical Journal
Volume	777
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/777/2/147
Publication status	Published - 23 Oct 2013

Keywords

galaxies: active, quasars: general, quasars: individual: B2 1023+25, X-rays: general, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena

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Sbarrato, T., Tagliaferri, G., Ghisellini, G., Perri, M., Puccetti, S., Balokovi, M., Nardini, M., Stern, D., Boggs, S. E., Brandt, W. N., Christensen, F. E., Giommi, P., Greiner, J., Hailey, C. J., Harrison, F. A., Hovatta, T., Madejski, G. M., Rau, A., Schady, P., ... Zhang, W. W. (2013). NuSTAR Detection of the Blazar B2 1023+25 at Redshift 5.3. Astrophysical Journal, 777(2), 147. https://doi.org/10.1088/0004-637X/777/2/147

Sbarrato, T, Tagliaferri, G, Ghisellini, G, Perri, M, Puccetti, S, Balokovi, M, Nardini, M, Stern, D, Boggs, SE, Brandt, WN, Christensen, FE, Giommi, P, Greiner, J, Hailey, CJ, Harrison, FA, Hovatta, T, Madejski, GM, Rau, A, Schady, P, Sudilovsky, V, Urry, CM & Zhang, WW 2013, 'NuSTAR Detection of the Blazar B2 1023+25 at Redshift 5.3', Astrophysical Journal, vol. 777, no. 2, pp. 147. https://doi.org/10.1088/0004-637X/777/2/147

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title = "NuSTAR Detection of the Blazar B2 1023+25 at Redshift 5.3",

abstract = "B2 1023+25 is an extremely radio-loud quasar at z = 5.3 that was first identified as a likely high-redshift blazar candidate in the SDSS+FIRST quasar catalog. Here, we use the Nuclear Spectroscopic Telescope Array (NuSTAR) to investigate its non-thermal jet emission, whose high-energy component we detected in the hard X-ray energy band. The X-ray flux is (5-10 keV) and the photon spectral index is ΓX 1.3-1.6. Modeling the full spectral energy distribution, we find that the jet is oriented close to the line of sight, with a viewing angle of ~3°, and has significant Doppler boosting, with a large bulk Lorentz factor ~13, which confirms the identification of B2 1023+25 as a blazar. B2 1023+25 is the first object at redshift larger than 5 detected by NuSTAR, demonstrating the ability of NuSTAR to investigate the early X-ray universe and to study extremely active supermassive black holes located at very high redshift.",

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T1 - NuSTAR Detection of the Blazar B2 1023+25 at Redshift 5.3

AU - Sbarrato, T.

AU - Tagliaferri, G.

AU - Ghisellini, G.

AU - Perri, M.

AU - Puccetti, S.

AU - Balokovi, M.

AU - Nardini, M.

AU - Stern, D.

AU - Boggs, S.~E.

AU - Brandt, W.~N.

AU - Christensen, F.~E.

AU - Giommi, P.

AU - Greiner, J.

AU - Hailey, C.~J.

AU - Harrison, F.~A.

AU - Hovatta, T.

AU - Madejski, G.~M.

AU - Rau, A.

AU - Schady, P.

AU - Sudilovsky, V.

AU - Urry, C.~M.

AU - Zhang, W.~W.

PY - 2013/10/23

Y1 - 2013/10/23

N2 - B2 1023+25 is an extremely radio-loud quasar at z = 5.3 that was first identified as a likely high-redshift blazar candidate in the SDSS+FIRST quasar catalog. Here, we use the Nuclear Spectroscopic Telescope Array (NuSTAR) to investigate its non-thermal jet emission, whose high-energy component we detected in the hard X-ray energy band. The X-ray flux is (5-10 keV) and the photon spectral index is ΓX 1.3-1.6. Modeling the full spectral energy distribution, we find that the jet is oriented close to the line of sight, with a viewing angle of ~3°, and has significant Doppler boosting, with a large bulk Lorentz factor ~13, which confirms the identification of B2 1023+25 as a blazar. B2 1023+25 is the first object at redshift larger than 5 detected by NuSTAR, demonstrating the ability of NuSTAR to investigate the early X-ray universe and to study extremely active supermassive black holes located at very high redshift.

AB - B2 1023+25 is an extremely radio-loud quasar at z = 5.3 that was first identified as a likely high-redshift blazar candidate in the SDSS+FIRST quasar catalog. Here, we use the Nuclear Spectroscopic Telescope Array (NuSTAR) to investigate its non-thermal jet emission, whose high-energy component we detected in the hard X-ray energy band. The X-ray flux is (5-10 keV) and the photon spectral index is ΓX 1.3-1.6. Modeling the full spectral energy distribution, we find that the jet is oriented close to the line of sight, with a viewing angle of ~3°, and has significant Doppler boosting, with a large bulk Lorentz factor ~13, which confirms the identification of B2 1023+25 as a blazar. B2 1023+25 is the first object at redshift larger than 5 detected by NuSTAR, demonstrating the ability of NuSTAR to investigate the early X-ray universe and to study extremely active supermassive black holes located at very high redshift.

KW - galaxies: active, quasars: general, quasars: individual: B2 1023+25, X-rays: general, Astrophysics - Cosmology and Nongalactic Astrophysics, Astrophysics - High Energy Astrophysical Phenomena

U2 - 10.1088/0004-637X/777/2/147

DO - 10.1088/0004-637X/777/2/147

M3 - Article

SN - 0004-637X

VL - 777

SP - 147

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

NuSTAR Detection of the Blazar B2 1023+25 at Redshift 5.3

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Keywords

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