NOAO > Observing Info > Approved Programs > 2010B-0284
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NOAO > Observing Info > Approved Programs > 2010B-0284 |
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PI: Malcolm G. Smith, NOAO, msmith@ctio.noao.edu
Address: CTIO, Casilla 603, La Serena, Chile
Title: Spectroscopic status of Light Pollution at CTIO
Abstract:
Our recent broad-band imaging (Kriscuinas et al. PASP in press) has
demonstrated essentially zero measurable broad-band light pollution over
La Serena down to the maximum zenith distances used under normal limit-
switch operating conditions on Cerro Tololo. We wish to perform a
qualitative check using spectroscopy at the CTIO 1.5m telescope. This
is a quick check (to minimize use of telescope time) along the lines of
the more detailed work on Kitt Peak and Mount Hopkins, reported by
Massey and Foltz (2000, PASP, 112, 566-573). Examination of recent
Hydra spectra suggest that very faint, high-pressure sodium radiation
has been detected on Tololo and it is important to verify this
identifiation by exposing in a direction over La Serena on a clear night
when light pollution is obvious and on a second night when La Serena is
covered in low cloud. This work is part of the wider "Astronomy and
World Heritage" Initiative with UNESCO to investigate and act on the
consequences of artificial night lighting - and to seek further levels
of protection for the world's key observatory sites.
National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360
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NOAO > Observing Info > Approved Programs > 2010B-0284 |
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