AAS 203rd Meeting, January 2004
Session 38 Observation and Instrumentation : Optical
Poster, Tuesday, January 6, 2004, 9:20am-6:30pm, Grand Hall

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[38.02] Spectra of Artificial Light Sources Near Cerro Tololo Interamerican Observatory

A. B. Whiting (CTIO)

I present objective-prism spectra of the major sources of artificial light visible from Cerro Tololo, as part of a study on present and impending light pollution. Spectra were obtained photographically using an improvised (but quite effective) objective-prism technique. Illumination from nearby towns is dominated by high-pressure sodium vapor lights, though a few mercury vapor/halogen lights (belonging to sports venues) are disproportionately bright. A nearby mine has installed low-pressure sodium lights, and the advantage (for astronomers) is obvious.

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Bulletin of the American Astronomical Society, 35#5
© 2003. The American Astronomical Soceity.