GRS 1739-278 observed at very low luminosity with XMM-NEWTON and NuSTAR
We present a detailed spectral analysis of XMM-Newton and NuSTAR observations of the accreting transient black hole GRS 1739−278 during a very faint low hard state at ∼0.02% of the Eddington luminosity (for a distance of 8.5 kpc and a mass of 10 M ). The broad-band X-ray spectrum between 0.5–60 ke...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Journal Article |
| Published: |
Institute of Physics Publishing
2016
|
| Online Access: | http://purl.org/au-research/grants/arc/FT140101082 http://hdl.handle.net/20.500.11937/10029 |
| _version_ | 1848746117336924160 |
|---|---|
| author | Fürst, F. Tomsick, J. Yamaoka, K. Dauser, T. Miller, J. Clavel, M. Corbel, S. Fabian, A. García, J. Harrison, F. Loh, A. Kaaret, P. Kalemci, E. Migliari, S. Miller-Jones, James Pottschmidt, K. Rahoui, F. Rodriguez, J. Stern, D. Stuhlinger, M. Walton, D. Wilms, J. |
| author_facet | Fürst, F. Tomsick, J. Yamaoka, K. Dauser, T. Miller, J. Clavel, M. Corbel, S. Fabian, A. García, J. Harrison, F. Loh, A. Kaaret, P. Kalemci, E. Migliari, S. Miller-Jones, James Pottschmidt, K. Rahoui, F. Rodriguez, J. Stern, D. Stuhlinger, M. Walton, D. Wilms, J. |
| author_sort | Fürst, F. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | We present a detailed spectral analysis of XMM-Newton and NuSTAR observations of the accreting transient
black hole GRS 1739−278 during a very faint low hard state at ∼0.02% of the Eddington luminosity (for a
distance of 8.5 kpc and a mass of 10 M ). The broad-band X-ray spectrum between 0.5–60 keV can be welldescribed by a power law continuum with an exponential cutoff. The continuum is unusually hard for such
a low luminosity, with a photon index of Γ = 1.39 ± 0.04. We find evidence for an additional reflection
component from an optically thick accretion disk at the 98% likelihood level. The reflection fraction is low
with Rrefl = 0.043+0.033
−0.023. In combination with measurements of the spin and inclination parameters made
with NuSTAR during a brighter hard state by Miller and co-workers, we seek to constrain the accretion disk
geometry. Depending on the assumed emissivity profile of the accretion disk, we find a truncation radius of
15–35 Rg (5–12 RISCO) at the 90% confiden |
| first_indexed | 2025-11-14T06:28:09Z |
| format | Journal Article |
| id | curtin-20.500.11937-10029 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:28:09Z |
| publishDate | 2016 |
| publisher | Institute of Physics Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-100292022-11-28T04:22:40Z GRS 1739-278 observed at very low luminosity with XMM-NEWTON and NuSTAR Fürst, F. Tomsick, J. Yamaoka, K. Dauser, T. Miller, J. Clavel, M. Corbel, S. Fabian, A. García, J. Harrison, F. Loh, A. Kaaret, P. Kalemci, E. Migliari, S. Miller-Jones, James Pottschmidt, K. Rahoui, F. Rodriguez, J. Stern, D. Stuhlinger, M. Walton, D. Wilms, J. We present a detailed spectral analysis of XMM-Newton and NuSTAR observations of the accreting transient black hole GRS 1739−278 during a very faint low hard state at ∼0.02% of the Eddington luminosity (for a distance of 8.5 kpc and a mass of 10 M ). The broad-band X-ray spectrum between 0.5–60 keV can be welldescribed by a power law continuum with an exponential cutoff. The continuum is unusually hard for such a low luminosity, with a photon index of Γ = 1.39 ± 0.04. We find evidence for an additional reflection component from an optically thick accretion disk at the 98% likelihood level. The reflection fraction is low with Rrefl = 0.043+0.033 −0.023. In combination with measurements of the spin and inclination parameters made with NuSTAR during a brighter hard state by Miller and co-workers, we seek to constrain the accretion disk geometry. Depending on the assumed emissivity profile of the accretion disk, we find a truncation radius of 15–35 Rg (5–12 RISCO) at the 90% confiden 2016 Journal Article http://hdl.handle.net/20.500.11937/10029 10.3847/0004-637X/832/2/115 http://purl.org/au-research/grants/arc/FT140101082 Institute of Physics Publishing fulltext |
| spellingShingle | Fürst, F. Tomsick, J. Yamaoka, K. Dauser, T. Miller, J. Clavel, M. Corbel, S. Fabian, A. García, J. Harrison, F. Loh, A. Kaaret, P. Kalemci, E. Migliari, S. Miller-Jones, James Pottschmidt, K. Rahoui, F. Rodriguez, J. Stern, D. Stuhlinger, M. Walton, D. Wilms, J. GRS 1739-278 observed at very low luminosity with XMM-NEWTON and NuSTAR |
| title | GRS 1739-278 observed at very low luminosity with XMM-NEWTON and NuSTAR |
| title_full | GRS 1739-278 observed at very low luminosity with XMM-NEWTON and NuSTAR |
| title_fullStr | GRS 1739-278 observed at very low luminosity with XMM-NEWTON and NuSTAR |
| title_full_unstemmed | GRS 1739-278 observed at very low luminosity with XMM-NEWTON and NuSTAR |
| title_short | GRS 1739-278 observed at very low luminosity with XMM-NEWTON and NuSTAR |
| title_sort | grs 1739-278 observed at very low luminosity with xmm-newton and nustar |
| url | http://purl.org/au-research/grants/arc/FT140101082 http://hdl.handle.net/20.500.11937/10029 |