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Broadband X-ray spectral analysis of the Seyfert 1 galaxy GRS 1734-292

Tortosa, A. and Marinucci, A. and Matt, G. and Bianchi, S. and La Franca, F. and Ballantyne, D. R. and Boorman, P. G. and Fabian, A. C. and Farrah, D. and Fuerst, F. and Gandhi, P. and Harrison, F. A. and Koss, M. J. and Ricci, C. and Stern, D. and Ursini, F. and Walton, D. J. (2017) Broadband X-ray spectral analysis of the Seyfert 1 galaxy GRS 1734-292. Monthly Notices of the Royal Astronomical Society, 466 (4). pp. 4193-4200. ISSN 0035-8711.

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We discuss the broad-band X-ray spectrum of GRS 1734−292 obtained from non-simultaneous XMM–Newton and NuSTAR (Nuclear Spectroscopic Telescope Array) observations, performed in 2009 and 2014, respectively. GRS1734−292 is a Seyfert 1 galaxy, located near the Galactic plane at z = 0.0214. The NuSTAR spectrum (3–80 keV) is dominated by a primary power-law continuum with Γ = 1.65 ± 0.05 and a high-energy cut-off E_c=53^(+11)_(−8) keV, one of the lowest measured by NuSTAR in a Seyfert galaxy. Comptonization models show a temperature of the coronal plasma of kT_e=11.9^(+1.2)_(−0.9) keV and an optical depth, assuming a slab geometry, τ=2.98^(+0.16)_(−0.19) or a similar temperature and τ=6.7^(+0.3)_(−0.4) assuming a spherical geometry. The 2009 XMM–Newton spectrum is well described by a flatter intrinsic continuum (Γ=1.47^(+0.07)_(−0.03)) and one absorption line due to Fe XXV Kα produced by a warm absorber. Both data sets show a modest iron Kα emission line at 6.4 keV and the associated Compton reflection, due to reprocessing from neutral circumnuclear material.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Matt, G.0000-0002-2152-0916
Bianchi, S.0000-0002-4622-4240
Ballantyne, D. R.0000-0001-8128-6976
Boorman, P. G.0000-0001-9379-4716
Fabian, A. C.0000-0002-9378-4072
Farrah, D.0000-0003-1748-2010
Fuerst, F.0000-0003-0388-0560
Gandhi, P.0000-0003-3105-2615
Harrison, F. A.0000-0003-2992-8024
Koss, M. J.0000-0002-7998-9581
Ricci, C.0000-0001-5231-2645
Stern, D.0000-0003-2686-9241
Walton, D. J.0000-0001-5819-3552
Additional Information:© 2016 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. Accepted 2016 December 14. Received 2016 December 14; in original form 2016 September 8. Published: 17 December 2016. We thank the anonymous referee for comments that helped improving the clarity of the paper. This work made use of data from the NuSTAR mission, a project led by the California Institute of Technology, managed by the Jet Propulsion Laboratory, and funded by the National Aeronautics and Space Administration. We thank the NuSTAR Operations, Software and Calibration teams for support with the execution and analysis of these observations. This research has made use of theNuSTAR Data Analysis Software (NUSTARDAS) jointly developed by the ASI Science Data Center (ASDC, Italy) and the California Institute of Technology (USA). The work is also based on observations obtained with XMM–Newton, an ESA science mission with instruments and contributions directly funded by ESA Member States and the USA (NASA). AT, AM, GM and FU acknowledge financial support from Italian Space Agency under grant ASI/INAF I/037/12/0-011/13 and SB under grant ASI-INAF I/037/12/P1. AT, AM, SB and GM acknowledge financial support from the European Union Seventh Framework Programme (FP7/2007-2013) under grant agreement no. 312789.
Group:Space Radiation Laboratory, NuSTAR, Astronomy Department
Funding AgencyGrant Number
Agenzia Spaziale Italiana (ASI)ASI/INAF I/037/12/0-011/13
Agenzia Spaziale Italiana (ASI)ASI-INAF I/037/12/P1
European Research Council (ERC)312789
Istituto Nazionale di Astrofisica (INAF)UNSPECIFIED
Subject Keywords:galaxies: active – galaxies: individual: GRS 1734−292 – galaxies: Seyfert –X-rays: galaxies
Issue or Number:4
Record Number:CaltechAUTHORS:20170623-134323659
Persistent URL:
Official Citation:A. Tortosa, A. Marinucci, G. Matt, S. Bianchi, F. La Franca, D. R. Ballantyne, P. G. Boorman, A. C. Fabian, D. Farrah, F. Fuerst, P. Gandhi, F. A. Harrison, M. J. Koss, C. Ricci, D. Stern, F. Ursini, D. J. Walton; Broad-band X-ray spectral analysis of the Seyfert 1 galaxy GRS 1734−292. Mon Not R Astron Soc 2017; 466 (4): 4193-4200. doi: 10.1093/mnras/stw3301
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:78522
Deposited By: Tony Diaz
Deposited On:26 Jun 2017 20:29
Last Modified:09 Mar 2020 13:19

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