4U 1909+07: A 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 | 2023-09-26T18:53:38Z | |
| dc.date.available | 2023-09-26T18:53:38Z | |
| dc.date.issued | 2011-01-01 | |
| dc.description.abstract | We present a detailed spectral and timing analysis of the High Mass X-ray Binary (HMXB) 4U1909+07 with INTEGRAL and RXTE. 4U1909+07 is a persistent accreting X-ray pulsar with a period of approximately 605s. The period changes erratically consistent with a random walk expected for a wind accreting system. INTEGRAL detects the source with an average of 2.4cps (corresponding to 15mCrab), but sometimes exhibits flaring activity up to 50cps (i.e. 300mCrab).The strongly energy dependent pulse profile shows a double peaked structure at low energies and only a single narrow peak at energies above 20keV. The phase averaged spectrum is well described by a power law modified at higher energies by an exponential cutoff and photoelectric absorption at low energies. In addition at 6.4keV a strong iron fluorescence line and at lower energies a blackbody component are present. We performed phase resolved spectroscopy to study the pulse phase dependence of the spectral parameters: while most spectral parameters are constant within uncertainties, the blackbody normalization and the cutoff folding energy vary strongly with phase. | 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. | |
| 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/m2mfst-yuaa | |
| 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/11603/29877 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | EDP Science | 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 Faculty Collection | |
| dc.relation.ispartof | UMBC Physics Department | |
| 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 HIDDEN PEARL | en_US |
| dc.type | Text | en_US |
| dcterms.creator | https://orcid.org/0000-0002-4656-6881 | en_US |