Document Type
Article
Publication Date
11-1-2001
Published In
Publications Of The Astronomical Society Of The Pacific
Abstract
We have completed a robotic wide-angle imaging survey of the southern sky (delta = +15 degrees to -90 degrees) at 656.3 nm wavelength, the H alpha emission line of hydrogen. Each image of the resulting Southern H alpha Sky Survey Atlas (SHASSA) covers an area of the sky 13 degrees square at an angular resolution of approximately 0.'8 and reaches a sensitivity level of 2 R (1.2 x 10(-17) ergs cm(-2) s(-1) arcsec(-2)) pixel(-1), corresponding to an emission measure of 4 cm(-6) pc and to a brightness temperature for microwave free-free emission of 12 muK at 30 GHz. Smoothing over several pixels allows features as faint as 0.5 R to be detected.
Recommended Citation
John E. Gaustad et al.
(2001).
"A Robotic Wide-Angle Hα Survey Of The Southern Sky".
Publications Of The Astronomical Society Of The Pacific.
Volume 113,
Issue 789.
1326-1348.
DOI: 10.1086/323969
https://works.swarthmore.edu/fac-physics/208
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Comments
This work is a preprint available from arXiv.org at < a href="http://arxiv.org/abs/astro-ph/0108518" >arXiv:astro-ph/0108518v1< /a >.
Images of individual fields in the survey may be examined on the Web.