4U 1909+07: a well-hidden pearl
| dc.contributor.author | Fürst, F. | |
| dc.contributor.author | Kreykenbohm, I. | |
| dc.contributor.author | Suchy, S. | |
| dc.contributor.author | Barragán, L. | |
| dc.contributor.author | Wilms, J. | |
| dc.contributor.author | Rothschild, R. E. | |
| dc.contributor.author | Pottschmidt, Katja | |
| dc.date.accessioned | 2023-09-26T18:56:52Z | |
| dc.date.available | 2023-09-26T18:56:52Z | |
| dc.date.issued | 2010-12-02 | |
| dc.description.abstract | We present the first detailed spectral and timing analysis of the high mass X-ray binary (HMXB) 4U 1909+07 with INTEGRAL and RXTE. 4U 1909+07 is detected in the ISGRI 20–40 keV energy band with an average countrate of 2.6 cts s⁻¹. The pulse period of ~604 s is not stable, but changing erratically on timescales of years. The pulse profile is strongly energy dependent: it shows a double peaked structure at low energies, the secondary pulse decreases rapidly with increasing energy and above 20 keV only the primary pulse is visible. This evolution is consistent between PCA, HEXTE, and ISGRI. The phase averaged spectrum can be well described by the sum of a photoabsorbed power law with a cutoff at high energies and a blackbody component. To investigate the pulse profile, we performed phase resolved spectral analysis. We find that the changing spectrum can be best described with a variation of the folding energy. We rule out a correlation between the black body component and the continuum variation and discuss possible accretion geometries. | en_US |
| dc.description.sponsorship | We thank the anonymous referee for her/his useful comments. This work was supported by the Bundesministerium für Wirtschaft und Technologie through DLR grant 50 OR 0808 and via a DAAD fellowship. This work has been partially funded by the European Commission under the 7th Framework Program under contract ITN 215212. F.F. thanks the colleagues at UCSD and GSFC for their hospitality. This research has made use of NASA’s Astrophysics Data System. This work is based on observations with INTEGRAL, an ESA project with instruments and science data centre funded by ESA member states (especially the PI countries: Denmark, France, Germany, Italy, Switzerland, Spain), Czech Republic and Poland, and with the participation of Russia and the USA. For this work we used the ISIS software package provided by MIT. We especially like to thank J. C. Houck and J. E. Davis for their restless work to improve ISIS and S-Lang. | en_US |
| dc.description.uri | https://www.aanda.org/articles/aa/full_html/2011/01/aa15636-10/aa15636-10.html | en_US |
| dc.format.extent | 9 pages | en_US |
| dc.genre | journal articles | en_US |
| dc.identifier | doi:10.13016/m299f2-v24r | |
| dc.identifier.citation | Fürst, F., I. Kreykenbohm, S. Suchy, L. Barragán, J. Wilms, R. E. Rothschild, and K. Pottschmidt. “4U 1909+07: A Well-Hidden Pearl.” Astronomy & Astrophysics 525 (January 1, 2011): A73. https://doi.org/10.1051/0004-6361/201015636. | en_US |
| dc.identifier.uri | https://doi.org/10.1051/0004-6361/201015636 | |
| dc.identifier.uri | http://hdl.handle.net/11603/29879 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | EDP Sciences | en_US |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Center for Space Sciences and Technology | |
| dc.relation.ispartof | UMBC Physics Department | |
| dc.relation.ispartof | UMBC Faculty Collection | |
| dc.rights | This item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author. | en_US |
| dc.rights | Attribution 4.0 International (CC BY 4.0) | * |
| dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | * |
| dc.title | 4U 1909+07: a well-hidden pearl | en_US |
| dc.type | Text | en_US |
| dcterms.creator | https://orcid.org/0000-0002-4656-6881 | en_US |