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.
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Journal ArticleDOI
OMCat: Catalogue of Serendipitous Sources Detected with the XMM-Newton Optical Monitor
TL;DR: The Optical Monitor Catalogue of serendipitous sources (OMCat) as discussed by the authors contains entries for every source detected in the publicly available XMM-Newton Optical Monitor (OM) images taken in either the imaging or optical modes.
Journal ArticleDOI
OMCat: Catalog of Serendipitous Sources Detected with the XMM-Newton Optical Monitor
TL;DR: The Optical Monitor Catalogue of serendipitous sources (OMCat) as mentioned in this paper contains entries for every source detected in the publically available XMM-Newton Optical Monitor (OM) images taken in either the imaging or "fast" modes.
Journal ArticleDOI
The Structure of the Local Hot Bubble
Wenhao Liu,Meng P. Chiao,Michael R. Collier,Thomas E. Cravens,Massimiliano Galeazzi,Dimitra Koutroumpa,Kip D. Kuntz,Rosine Lallement,Susan T. Lepri,Dan McCammon,Kelsey M. Morgan,Frederick S. Porter,Steven L. Snowden,N. E. Thomas,Y. Uprety,Y. Uprety,Eugenio Ursino,Eugenio Ursino,Brian Walsh +18 more
TL;DR: In this paper, the contribution of SWCX to the diffuse X-ray background measured by the ROSAT All Sky Survey (RASS) was quantified and removed based on the results from the DXL mission, and a thermal emission measure map was generated to characterize the three-dimensional (3D) structure of the LHB.
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Diffuse Soft X-ray Emission from Several Nearby Spiral Galaxies
TL;DR: In this paper, the authors derived upper limits on the diffuse emission in terms of upper limits to the average intensity of a putative hot halo, which can also be used to derived limits to total energy radiated by hot gas in the observed galaxies as a function of its temperature for various assumed absorbing geometries.
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Limits to the 1/4 keV Extragalactic X-ray Background
TL;DR: In this article, the authors derived a lower and upper bound on the intensity of the 1/4 keV extragalactic X-ray background from the depth of the shadow observed in NGC 3184, assuming that there is no unresolved 1 4 keV emission from the outer region of the galaxy which may otherwise partially fill in the shadow.