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Bradford J. Wargelin
Researcher at Harvard University
Publications - 73
Citations - 2990
Bradford J. Wargelin is an academic researcher from Harvard University. The author has contributed to research in topics: Stars & Electron beam ion trap. The author has an hindex of 27, co-authored 72 publications receiving 2815 citations. Previous affiliations of Bradford J. Wargelin include Lawrence Livermore National Laboratory & University of California, Berkeley.
Papers
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Journal ArticleDOI
Bayesian Estimation of Hardness Ratios: Modeling and Computations
Taeyoung Park,Vinay L. Kashyap,Aneta Siemiginowska,David A. van Dyk,Andreas Zezas,Craig O. Heinke,Bradford J. Wargelin +6 more
TL;DR: A rigorous statistical treatment of hardness ratios that properly deals with detected photons as independent Poisson random variables and correctly deals with the non-Gaussian nature of the error propagation is developed.
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Is RX J1856.5-3754 a Quark Star?
Jeremy J. Drake,Herman L. Marshall,Stefan Dreizler,Peter E. Freeman,Antonella Fruscione,Michael Juda,Vinay L. Kashyap,Fabrizio Nicastro,Deron O. Pease,Bradford J. Wargelin,Klaus Werner +10 more
TL;DR: In this paper, Chandra Low Energy Transmission Grating and High Resolution Camera spectroscopic observations of the isolated neutron star candidate RX J1856.5-3754 have been analyzed to search for metallic and resonance cyclotron spectral features and for pulsation behavior.
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Chandra spectra of the soft x-ray diffuse background
Maxim Markevitch,Marshall W. Bautz,Marshall W. Bautz,Beth Biller,Yousaf M. Butt,Richard J. Edgar,Terrance J. Gaetz,Gordon P. Garmire,Gordon P. Garmire,Catherine E. Grant,Catherine E. Grant,Paul J. Green,Michael Juda,Paul P. Plucinsky,Daniel A. Schwartz,Randall K. Smith,Alexey Vikhlinin,Shanil N. Virani,Bradford J. Wargelin,Scott J. Wolk +19 more
TL;DR: In this paper, Chandra ACIS-S3 was used to model the diffuse component of the cosmic X-ray background (CXB) in the 0.3-7 keV band for four directions at high Galactic latitudes.
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First light measurements of Capella with the low-energy transmission grating spectrometer aboard the Chandra X-ray observatory
A. C. Brinkman,C. J. T. Gunsing,Jelle Kaastra,R. L. J. van der Meer,R. Mewe,Frits Paerels,A. J. J. Raassen,J. J. van Rooijen,Heinrich Bräuninger,Wolfgang Burkert,Vadim Burwitz,Gisela Hartner,Peter Predehl,Jan-Uwe Ness,J. H. M. M. Schmitt,Jeremy J. Drake,O. Johnson,Michael Juda,V. Kashyap,Stephen S. Murray,Deron O. Pease,Peter W. Ratzlaff,Bradford J. Wargelin +22 more
TL;DR: The first X-ray spectrum obtained by the Low-Energy Transmission Grating Spectrometer (LETGS) aboard the Chandra X-Ray Observatory is presented and plasma parameters derived from line ratios in narrow spectral bands are discussed.
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Chandra observations of the ''dark'' moon and geocoronal solar wind charge transfer
Bradford J. Wargelin,Maxim Markevitch,Maxim Markevitch,Michael Juda,Vasili Kharchenko,R. Edgar,Alexander Dalgarno +6 more
TL;DR: In this paper, the authors analyzed data from two sets of calibration observations of the Moon made by the Chandra X-Ray Observatory and found that the apparent dark-side brightness varied in time by at least an order of magnitude, up to 2.