S
Steven L. Snowden
Researcher at Goddard Space Flight Center
Publications - 68
Citations - 6113
Steven L. Snowden is an academic researcher from Goddard Space Flight Center. The author has contributed to research in topics: ROSAT & Galaxy. The author has an hindex of 31, co-authored 68 publications receiving 5712 citations. Previous affiliations of Steven L. Snowden include Universities Space Research Association & University of Wisconsin-Madison.
Papers
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Journal ArticleDOI
ROSAT Survey Diffuse X-Ray Background Maps. II.
Steven L. Snowden,Roland Egger,Michael Freyberg,Dan McCammon,Paul P. Plucinsky,Paul P. Plucinsky,Paul P. Plucinsky,Wilton T. Sanders,J. H. M. M. Schmitt,Joachim Trümper,Wolfgang Voges +10 more
TL;DR: In this paper, the authors presented new maps of the soft X-ray background from the ROSAT all-sky survey, which represent a significant improvement over the previous version in that position resolution of the PSPC has been used to improve the angular resolution from 2? to 12' and the contributions of point sources have been removed to a uniform source flux level over most of the sky.
Journal ArticleDOI
The large‐scale HI structure of the Small Magellanic Cloud
Snezana Stanimirovic,Snezana Stanimirovic,Lister Staveley-Smith,John M. Dickey,Robert J. Sault,Steven L. Snowden +5 more
TL;DR: In this paper, Parkes telescope observations of neutral hydrogen (Hi) in the Small Magellanic Cloud (SMC) were combined with an Australia Telescope Compact Array (ATCA) aperture synthesis mosaic to obtain a set of images sensitive to all angular (spatial) scales between 98 arcsec (30 pc) and 4° (4 kpc).
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A Catalog of Galaxy Clusters Observed by XMM-Newton
TL;DR: In this article, images and the radial profiles of the temperature, abundance, and brightness for 70 clusters of galaxies observed by XMM-Newton are presented along with a detailed discussion of the data reduction and analysis methods, including background modeling, which were used in the processing.
Journal ArticleDOI
Analysis procedures for ROSAT XRT/PSPC observations of extended objects and the diffuse background
TL;DR: In this paper, a set of pulse-height bands are recommended for analyzing extended structure and the use of detector efficiency maps for proper flat-fielding of images are discussed and demonstrated using IDL routines for implementing these data reduction procedures.
Journal ArticleDOI
Progress on Establishing the Spatial Distribution of Material Responsible for the 1/4 keV Soft X-Ray Diffuse Background Local and Halo Components
Steven L. Snowden,Steven L. Snowden,Steven L. Snowden,Roland Egger,Douglas P. Finkbeiner,Michael Freyberg,Paul P. Plucinsky +6 more
TL;DR: In this article, a new look at the distribution of emission responsible for the soft X-ray diffuse background (SXRB) using ROSAT all-sky survey data was presented.