Journal
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
Volume 146, Issue 2, Pages 407-415Publisher
UNIV CHICAGO PRESS
DOI: 10.1086/374411
Keywords
dust, extinction; HII regions; ISM : clouds
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A full-sky Ha map with 6' (FWHM) resolution is presented. This map is a composite of the Virginia Tech Spectral line Survey (VTSS) in the north and the Southern H-Alpha Sky Survey Atlas (SHASSA) in the south. The Wisconsin H-Alpha Mapper (WHAM) survey provides a stable zero point over 3/4 of the sky on a 1degrees scale. This composite map can be used to provide limits on thermal bremsstrahlung (free-free emission) from ionized gas known to contaminate microwave-background data. The map is available on the World Wide Web for public use.
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