Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-06-18
Astronomy and Astrophysics
Astrophysics
14 pages, 5 tables, 9 figures, accepted by PASP in May 2007
Scientific paper
10.1086/520097
We report precipitable water vapor (PWV) measurements made at Las Campanas Observatory using optical spectra of H2O lines obtained with the Magellan echelle spectrograph, and calculated using a robust technique that is accurate to 5-10%. Calibration of the relationship between our PWV measurements and opacity values at 225 GHz was made possible by simultaneous tipping radiometer observations. Based on this calibration, we present Las Campanas Observatory winter-time precipitable water vapor statistics, measured using the tipping radiometer, during a two month campaign. The median value of 2.8 +- 0.3 mm is consistent with that measured at the nearby La Silla Observatory during the VLT site survey. We conclude that, in the Southern hemisphere winter months, we can expect good conditions for infrared observing (<~1.5 mm) approximately 10% of the time at Las Campanas Observatory.
Folkers T.
Lopez-Morales Mercedes
McWilliam Andrew
Morrell Nidia
Phillips Marcia
No associations
LandOfFree
Calibration of the Relationship between Precipitable Water Vapor and 225 GHz Atmospheric Opacity via Optical Echelle Spectroscopy at Las Campanas Observatory does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Calibration of the Relationship between Precipitable Water Vapor and 225 GHz Atmospheric Opacity via Optical Echelle Spectroscopy at Las Campanas Observatory, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Calibration of the Relationship between Precipitable Water Vapor and 225 GHz Atmospheric Opacity via Optical Echelle Spectroscopy at Las Campanas Observatory will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-281008