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The Phoenix galaxy as seen by NuSTAR

The Phoenix galaxy as seen by NuSTAR
The Phoenix galaxy as seen by NuSTAR
Aims. We study the long-term variability of the well-known Seyfert 2 galaxy Mrk 1210 (a.k.a. UGC 4203, or the Phoenix galaxy).

Methods. The source was observed by many X-ray facilities in the last 20 years. Here we present a NuSTAR observation and put the results in context of previously published observations.

Results. NuSTAR observed Mrk 1210 in 2012 for 15.4 ks. The source showed Compton-thin obscuration similar to that observed by Chandra, Suzaku, BeppoSAX and XMM-Newton over the past two decades, but different from the first observation by ASCA in 1995, in which the active nucleus was caught in a low flux state - or obscured by Compton-thick matter, with a reflection-dominated spectrum. Thanks to the high-quality hard X-ray spectrum obtained with NuSTAR and exploiting the long-term spectral coverage spanning 16.9 years, we can precisely disentangle the transmission and reflection components and put constraints on both the intrinsic long-term variability and hidden nucleus scenarios. In the former case, the distance between the reflector and the source must be at least ~ 2 pc, while in the latter one the eclipsing cloud may be identified with a water maser-emitting clump.
0004-6361
1-10
Masini, A.
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Comastri, A.
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Puccetti, S.
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Baloković, M.
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Gandhi, P.
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Guainazzi, M.
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Bauer, F.E.
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Boggs, S.E.
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Boorman, P.G.
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Brightman, M.
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Christensen, F.E.
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Craig, W.W.
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Farrah, D.
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Hailey, C.J.
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Harrison, F.A.
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Koss, M.J.
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LaMassa, S.M.
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Ricci, C.
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Stern, D.
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Walton, D.J.
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Zhang, W.W.
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Masini, A.
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Comastri, A.
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Puccetti, S.
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Baloković, M.
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Gandhi, P.
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Guainazzi, M.
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Bauer, F.E.
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Boggs, S.E.
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Boorman, P.G.
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Brightman, M.
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Christensen, F.E.
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Craig, W.W.
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Farrah, D.
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Hailey, C.J.
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Harrison, F.A.
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Koss, M.J.
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LaMassa, S.M.
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Ricci, C.
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Stern, D.
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Walton, D.J.
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Zhang, W.W.
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Masini, A., Comastri, A., Puccetti, S., Baloković, M., Gandhi, P., Guainazzi, M., Bauer, F.E., Boggs, S.E., Boorman, P.G., Brightman, M., Christensen, F.E., Craig, W.W., Farrah, D., Hailey, C.J., Harrison, F.A., Koss, M.J., LaMassa, S.M., Ricci, C., Stern, D., Walton, D.J. and Zhang, W.W. (2016) The Phoenix galaxy as seen by NuSTAR. Astronomy & Astrophysics, 1-10. (In Press)

Record type: Article

Abstract

Aims. We study the long-term variability of the well-known Seyfert 2 galaxy Mrk 1210 (a.k.a. UGC 4203, or the Phoenix galaxy).

Methods. The source was observed by many X-ray facilities in the last 20 years. Here we present a NuSTAR observation and put the results in context of previously published observations.

Results. NuSTAR observed Mrk 1210 in 2012 for 15.4 ks. The source showed Compton-thin obscuration similar to that observed by Chandra, Suzaku, BeppoSAX and XMM-Newton over the past two decades, but different from the first observation by ASCA in 1995, in which the active nucleus was caught in a low flux state - or obscured by Compton-thick matter, with a reflection-dominated spectrum. Thanks to the high-quality hard X-ray spectrum obtained with NuSTAR and exploiting the long-term spectral coverage spanning 16.9 years, we can precisely disentangle the transmission and reflection components and put constraints on both the intrinsic long-term variability and hidden nucleus scenarios. In the former case, the distance between the reflector and the source must be at least ~ 2 pc, while in the latter one the eclipsing cloud may be identified with a water maser-emitting clump.

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1609.00374v1.pdf - Accepted Manuscript
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Accepted/In Press date: 1 September 2016
Organisations: Astronomy Group

Identifiers

Local EPrints ID: 400030
URI: http://eprints.soton.ac.uk/id/eprint/400030
ISSN: 0004-6361
PURE UUID: 2dceb8a3-0565-42d3-8e3e-08aeb1903cca
ORCID for P. Gandhi: ORCID iD orcid.org/0000-0003-3105-2615
ORCID for P.G. Boorman: ORCID iD orcid.org/0000-0001-9379-4716

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Date deposited: 07 Sep 2016 09:29
Last modified: 07 Oct 2020 04:39

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Contributors

Author: A. Masini
Author: A. Comastri
Author: S. Puccetti
Author: M. Baloković
Author: P. Gandhi ORCID iD
Author: M. Guainazzi
Author: F.E. Bauer
Author: S.E. Boggs
Author: P.G. Boorman ORCID iD
Author: M. Brightman
Author: F.E. Christensen
Author: W.W. Craig
Author: D. Farrah
Author: C.J. Hailey
Author: F.A. Harrison
Author: M.J. Koss
Author: S.M. LaMassa
Author: C. Ricci
Author: D. Stern
Author: D.J. Walton
Author: W.W. Zhang

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