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The Virginia Tech Spectral-Line Survey (VTSS)
The VTSS is a wide-field image survey of the Galaxy's warm ionized interstellar medium (a 10,000 K plasma).
The survey is carried out using the Virginia Tech Spectral Line Imaging Camera (SLIC),
specially designed for obtaining sensitive, arcminute-resolution,
10-degree wide images of the 6563Å H-alpha recombination line of hydrogen,
and the [SII]6717,6731Å doublet emission of singly ionized sulfur.
This survey will cover the northern hemisphere (declinations greater than -15 degrees).
The resolution of the map is 1.6' and units are Rayleighs (R).
The Continuum-Corrected H-alpha images are produced by a process including the alignment and subtraction of a suitably scaled version of a continuum image from the H-alpha image.
| VTSS Halpha | VTSS Continuum corrected Halpha |
|---|---|
Reference
'An Imaging Survey of Northern Galactic Hα Emission with Arcminute Resolution' by Dennison, B., Simonetti, J. H., and Topasna, G. A., 1998, PASA, 15, 147 http://adsabs.harvard.edu/abs/1998PASA...15..147D