Mr. Adam Smith Profile

Adam Smith

at Gemini Observatory

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Proceedings Article | 15 July 2016 Paper

Measurements of airglow on Maunakea at Gemini Observatory

Katherine Roth, Adam Smith, Andrew Stephens, Olesja Smirnova

Proceedings Volume 9910, 99101B (2016) https://doi.org/10.1117/12.2233891

KEYWORDS: Airglow, Gemini Observatory, Infrared imaging, Infrared radiation, Telescopes, Sun, Clouds, K band, Cameras, Signal to noise ratio

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Gemini Observatory on Maunakea has been collecting optical and infrared science data for almost 15 years. We have begun a program to analyze imaging data from two of the original facility instruments, GMOS and NIRI, in order to measure sky brightness levels in multiple infrared and optical broad-band filters. The present work includes data from mid-2016 back through late-2008. We present measured background levels as a function of several operational quantities (e.g. moon phase, hours from twilight, season). We find that airglow is a significant contributor to background levels in several filters. Gemini is primarily a queue scheduled telescope, with observations being optimally executed in order to provide the most efficient use of telescope time. We find that while most parameters are well-understood, the atmospheric airglow remains challenging to predict. This makes it difficult to schedule observations which require dark skies in these filters, and we suggest improvements to ensure data quality.

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