The reawakening of the sleeping X-ray pulsar XTE J1946+274
| dc.contributor.author | Müller, S. | |
| dc.contributor.author | Kühnel, M. | |
| dc.contributor.author | Caballero, I. | |
| dc.contributor.author | Pottschmidt, Katja | |
| dc.contributor.author | Fürst, F. | |
| dc.contributor.author | Kreykenbohm, I. | |
| dc.contributor.author | Sagredo, M. | |
| dc.contributor.author | Obst, M. | |
| dc.contributor.author | Wilms, J. | |
| dc.contributor.author | Ferrigno, C. | |
| dc.contributor.author | Rothschild, R. E. | |
| dc.contributor.author | Staubert, R. | |
| dc.date.accessioned | 2023-09-14T21:02:58Z | |
| dc.date.available | 2023-09-14T21:02:58Z | |
| dc.date.issued | 2012-10-18 | |
| dc.description.abstract | We report on a series of outbursts of the high-mass X-ray binary XTE J1946+274 in 2010/2011 observed with INTEGRAL, RXTE, and Swift. We discuss possible mechanisms resulting in the extraordinary outburst behavior of this source. The X-ray spectra can be described by standard phenomenological models, enhanced by an absorption feature of unknown origin at about 10 keV and a narrow iron Kα fluorescence line at 6.4 keV, which are variable in flux and pulse phase. We find possible evidence for a cyclotron resonance scattering feature at about 25 keV at the 93% level. The presence of a strong cyclotron line at 35 keV seen in data from the source’s 1998 outburst that was confirmed by a reanalysis of these data can be excluded. This result indicates that the cyclotron line feature in XTE J1946+274 is variable between individual outbursts. | en_US |
| dc.description.sponsorship | The authors thank Jérôme Rodriguez for his help with the INTEGRAL observations, and the schedulers of RXTE and Swift for their role in making this campaign possible. We thank the anonymous referee for his/her thorough review of this paper and his/her constructive comments. We thank John E. Davis for the development of the SLxfig module, which was used to create all figures in the paper. We acknowledge funding by the Bundesministerium für Wirtschaft und Technologie under Deutsches Zentrum für Luft- und Raumfahrt grants 50 OR 0808, 50 OR 0905, and 50 OR 1113. I.C. acknowledges financial support from the French Space Agency CNES through CNRS. This research is also 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. | en_US |
| dc.description.uri | https://www.aanda.org/articles/aa/full_html/2012/10/aa19580-12/aa19580-12.html | en_US |
| dc.format.extent | 9 pages | en_US |
| dc.genre | journal articles | en_US |
| dc.identifier | doi:10.13016/m2slkt-3fcb | |
| dc.identifier.citation | Müller, S., M. Kühnel, I. Caballero, K. Pottschmidt, F. Fürst, I. Kreykenbohm, M. Sagredo, et al. “The Reawakening of the Sleeping X-Ray Pulsar XTE J1946+274.” Astronomy & Astrophysics 546 (October 1, 2012): A125. https://doi.org/10.1051/0004-6361/201219580. | en_US |
| dc.identifier.uri | https://doi.org/10.1051/0004-6361/201219580 | |
| dc.identifier.uri | http://hdl.handle.net/11603/29693 | |
| 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 | The reawakening of the sleeping X-ray pulsar XTE J1946+274 | en_US |
| dc.type | Text | en_US |
| dcterms.creator | https://orcid.org/0000-0002-4656-6881 | en_US |