Douglas A. Swartz
Marshall Space Flight Center
203 Papers
1.7K Citations
Douglas A. Swartz is an academic researcher from Marshall Space Flight Center. The author has contributed to research in topics: Galaxy & Pulsar. The author has an hindex of 36, co-authored 149 publications. Previous affiliations of Douglas A. Swartz include Universities Space Research Association & Harvard University.
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Papers
Discovery of a variable energy-dependent X-ray polarization in the accreting neutron star GX 5-1
Sergio Fabiani,Fiamma Capitanio,R. Iaria,Juri Poutanen,A. Gnarini,Francesco-Alessio Ursini,Ruben Farinelli,Anna Bobrikova,J. F. Steiner,Jiri Svoboda,A. Anitra,Maria Cristina Baglio,F. Carotenuto,M. Del Santo,C. Ferrigno,Fraser Lewis,D. M. Russell,Thomas D. Russell,Jakob van den Eijnden,Massimo Cocchi,A. D. Marco,Fabio La Monaca,Kuan Liu,John Rankin,Martin C. Weisskopf,Fei Xie,S. Bianchi,Luciano Burderi,T. Di Salvo,Elise Egron,Giulia Illiano,P. Kaaret,G. Matt,R. Mikuvsincov'a,Fabio Muleri,Alessandro Papitto,I. Agudo,L. A. Antonelli,Matteo Bachetti,L. Baldini,W. Baumgartner,Ronaldo Bellazzini,Stephen D. Bongiorno,R. Bonino,A. Brez,N. Bucciantini,S. Castellano,E. Cavazzuti,Chien-Ting Chen,Stefano Ciprini,Enrico Costa,A. D. Rosa,E. Del Monte,L. Di Gesu,N. Di Lalla,I. Donnarumma,Victor Doroshenko,Michal Dovciak,S. Ehlert,Teruaki Enoto,Y. Evangelista,Riccardo Ferrazzoli,Javier A. García,Shuichi Gunji,Kiyoshi Hayashida,Jeremy S. Heyl,Wataru Iwakiri,Svetlana G. Jorstad,Vladimir Karas,Fabian Kislat,Takao Kitaguchi,Jeffrey Kolodziejczak,Henric Krawczynski,Luca Latronico,Ioannis Liodakis,S. Maldera,Alberto Manfreda,F. Marin,Andrea Marinucci,Alan P. Marscher,Herman L. Marshall,F. Massaro,Ikuyuki Mitsuishi,Tsunefumi Mizuno,M. Negro,C. Ng,Stephen L. O'Dell,Nicola Omodei,Chiara Oppedisano,George G. Pavlov,A. L. Peirson,M. Perri,Melissa Pesce-Rollins,P.-O. Petrucci,M. Pilia,A. Possenti,Simonetta Puccetti,B. Ramsey,Ajay Ratheesh,Oliver J. Roberts,Roger W. Romani,Carmelo Sgrò,Patrick Slane,Paolo Soffitta,Gloria Spandre,Douglas A. Swartz,Toru Tamagawa,Fabrizio Tavecchio,Roberto Taverna,Yuzuru Tawara,Allyn F. Tennant,N. Thomas,Francesco Tombesi,Alessio Trois,Sergey S. Tsygankov,Roberto Turolla,J. Vink,Kinwah Wu,Silvia Zane +118 more
- 10 Oct 2023
TL;DR: Discovery of variable energy-dependent X-ray polarization in the accreting neutron star GX 5-1 confirms the variation in polarization degree as a function of the position of the source in the color-color diagram. Evidence of a variation in the polarization angle with energy is also found.
Chandra discovery of luminous supersoft x-ray sources in m81
TL;DR: In this article, a Chandra ACIS-S imaging observation of the nearby galaxy M81 (NGC 3031) reveals 9 luminous soft X-ray sources, which fall into the class of supersoft sources defined by previous ROSAT and Einstein studies of nearby galaxies.
The Lynx X-ray Observatory: revealing the invisible universe
Daniel A. Schwartz,Alexey Vikhlinin,Harvey Tananbaum,Mark D. Freeman,Grant R. Tremblay,Eric D. Schwartz,Jessica A. Gaskin,Douglas A. Swartz,Karen Gelmis,Kevin S. McCarley,A. Domínguez +10 more
- 09 Sep 2019
TL;DR: A Design Reference Mission driven by the need to solve fundamental problems in three broad areas of astrophysics, the Lynx Observatory will provide discovery space for all of astroph physics, and also address questions which will only be revealed as the authors' knowledge increases.
Radiation environment of the Chandra X-Ray Observatory
Stephen L. O'Dell,Marshall W. Bautz,William C. Blackwell,Yousaf M. Butt,Robert A. Cameron,Ronald F. Elsner,M. S. Gussenhoven,Jeffery J. Kolodziejczak,Joseph I. Minow,Robert M. Suggs,Douglas A. Swartz,Allyn F. Tennant,Shanil N. Virani,Kevin M. Warren +13 more
- 13 Dec 2000
TL;DR: In a subsequent anomaly investigation, it was determined that moderately low-energy protons (or other ions) propagated through the mirror assembly, causing the observed damage as mentioned in this paper, and steps were taken to prevent further performance degradation by magnetospheric and solar-wind protons and other ions.
Chandra x-ray observatory observations of the globular cluster m28 and its millisecond pulsar psr b1821-24
Werner Becker,Douglas A. Swartz,George G. Pavlov,Ronald F. Elsner,Jonathan E. Grindlay,Roberto Mignani,Allyn F. Tennant,Don Backer,L. Pulone,Vincenzo Testa,Martin C. Weisskopf +10 more
TL;DR: In this paper, Chandra X-ray observations of the globular cluster M28 (NGC 6626) were used to detect 46 sources of which 12 lie within one core radius of the center and obtained the best fit mass of the sources to be M(sub x) approx. 1.9 solar masses.