J
Joanne E. Hill
Researcher at Goddard Space Flight Center
Publications - 107
Citations - 11710
Joanne E. Hill is an academic researcher from Goddard Space Flight Center. The author has contributed to research in topics: Gamma-ray burst & X-ray telescope. The author has an hindex of 27, co-authored 106 publications receiving 10989 citations. Previous affiliations of Joanne E. Hill include Universities Space Research Association & Pennsylvania State University.
Papers
More filters
Journal ArticleDOI
Gas Gain Measurements From a Negative Ion TPC X-ray Polarimeter
TL;DR: In this paper, a negative ion TPC (NITPC) with Nitromethane (CH3NO2) as the electron capture agent is proposed, where the diffusion of negative ions is reduced over that of electrons due to the thermal coupling of the negative ions to the surrounding gas.
Proceedings ArticleDOI
Properties of the flight model gas electron multiplier for the GEMS mission
Yoko Takeuchi,Takao Kitaguchi,Asami Hayato,Toru Tamagawa,Wataru Iwakiri,F. Asami,Akifumi Yoshikawa,Kenta Kaneko,Teruaki Enoto,Kevin Black,Joanne E. Hill,Keith Jahoda +11 more
TL;DR: In this paper, the authors present the gain properties of the gas electron multiplier (GEM) foil in pure DME gas at 190 Torr and show that the maximum effective gain is 2 x 10(exp 4) with the applied voltage of 580 V.
Proceedings ArticleDOI
The x-ray polarimeter instrument on board the Polarimeter for Relativistic Astrophysical X-ray Sources (PRAXyS) mission
Joanne E. Hill,J. K. Black,Keith Jahoda,Toru Tamagawa,Wataru Iwakiri,Takao Kitaguchi,Megu Kubota,P. Kaaret,Ross McCurdy,Drew M. Miles,Takashi Okajima,Yang Soong,L. Olsen,Leroy Sparr,S. J. Mosely,David S. Nolan +15 more
TL;DR: The Polarimeter for Relativistic Astrophysical X-ray Sources (PRAXyS) is one of three Small Explorer (SMEX) spacecraft selected by NASA for Phase A study as mentioned in this paper.
Journal ArticleDOI
Swift and XMM-Newton observations of the dark GRB 050326
Alberto Moretti,A. De Luca,D. Malesani,Sergio Campana,Andrea Tiengo,A. Cucchiara,James Reeves,Guido Chincarini,Guido Chincarini,C. Pagani,C. Pagani,P. Romano,Gianpiero Tagliaferri,P.L. Banat,M. Capalbi,M. Perri,Giancarlo Cusumano,V. Mangano,Teresa Mineo,V. La Parola,Andrew P. Beardmore,Michael R. Goad,J. P. Osborne,Joanne E. Hill,Joanne E. Hill,Lorella Angelini,Lorella Angelini,David N. Burrows,Shiho Kobayashi,Peter Mészáros,Bing Zhang,Scott Barthelmy,L. M. Barbier,N. E. White,E. E. Fenimore,L. R. Cominsky,Neil Gehrels +36 more
TL;DR: In this paper, a gamma-ray burst was detected by the Swift X-Ray Telescope (XRT) and XMM-Newton X-ray afterglow beginning 54min and 8.5h after the burst.
Proceedings ArticleDOI
Characterization and evolution of the swift x-ray telescope instrumental background
C. Pagani,D. C. Morris,Judith Racusin,Dirk Grupe,L. Vetere,Michael C. Stroh,A. D. Falcone,J. A. Kennea,David N. Burrows,J. A. Nousek,A. F. Abbey,Lorella Angelini,A. P. Beardmore,Sergio Campana,M. Capalbi,Guido Chincarini,Oberto Citterio,Giancarlo Cusumano,P. Giommi,Olivier Godet,Joanne E. Hill,Joanne E. Hill,V. La Parola,V. Mangano,Teresa Mineo,Alberto Moretti,J. P. Osborne,K. L. Page,M. Perri,P. Romano,G. Tagliaferri,F. Tamburelli +31 more
TL;DR: In this paper, the authors investigated the properties of the instrumental background, focusing on its dynamic behavior on both long and short timescales, and determined the fraction of the detector background that is due to the internal, instrumental background and the part that are due to unresolved astrophysical sources (the cosmic X-ray background).