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- N. Gehrels9 profiles110 · h 120
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- University of Maryland, College ParkUS140 papers
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28 papers · 1 filter
AXIOM: Advanced X-ray Imaging Of the Magnetosphere
G. Branduardi-Raymont, S. F. Sembay, J. P. Eastwood +22
Planetary plasma and magnetic field environments can be studied by in situ measurements or by remote sensing. While the former provide precise information about plasma behaviour, i…
Estimates of Densities and Filling Factors from a Cooling Time Analysis of Solar Microflares Observed with RHESSI
R. N. Baylor, P. A. Cassak, S. Christe +6
We use more than 4,500 microflares from the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) microflare data set (Christe et al., 2008, Ap. J., 677, 1385) to estimate…
Chandra Discovery of a Binary Active Galactic Nucleus in Mrk 739
Michael Koss, Richard Mushotzky, Ezequiel Treister +6
We have discovered a binary AGN in the galaxy Mrk 739 using Chandra and Swift BAT. We find two luminous L_2-10 keV=1.1*10^43 and 1.0*10^42 erg/s, unresolved nuclei with a projected…
Distribution Functions of Sizes and Fluxes Determined from Supra-Arcade Downflows
David E. McKenzie, Sabrina L. Savage
The frequency distributions of sizes and fluxes of supra-arcade downflows (SADs) provide information about the process of their creation. For example, a fractal creation process ma…
Implicit Priors in Galaxy Cluster Mass and Scaling Relation Determinations
Adam Mantz, Steven W. Allen
Deriving the total masses of galaxy clusters from observations of the intracluster medium (ICM) generally requires some prior information, in addition to the assumptions of hydrost…
X-ray illumination of the ejecta of Supernova 1987A
J. Larsson, C. Fransson, G. Östlin +25
We present the late-time optical light curve of the ejecta of SN 1987A measured from HST imaging observations spanning the past 17 years. We find that the flux from the ejecta decl…