Reporting the first 3 years of 225-GHz opacity measurements at the site of the Large Millimeter Telescope Alfonso Serrano
Reporting the first 3 years of 225-GHz opacity measurements at the site of the Large Millimeter Telescope Alfonso Serrano
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报告前 3 年在大型毫米波望远镜阿方索·塞拉诺 (Alfonso Serrano) 进行的 225 GHz 不透明度测量
DOI：
10.1117/12.2232168
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发表时间：
2016
影响因子：
2
通讯作者：
L. Erro
中科院分区：
文献类型：
--
作者：
M. Zeballos;D. Ferrusca;D. Hughes;L. Erro
大毫米望远镜阿方索·塞拉诺(LMT)位于墨西哥普埃布拉，海拔4580米。它是目前建造的最大的单碟式望远镜，波长在0.85到4毫米之间。识别星际分子，探索稠密的暗云，以及了解本地和遥远宇宙中冷物质和星际尘埃的性质是它的主要科学目标之一。自2013年6月以来，LMT开展了四次共同风险的早期科学活动*借助新的气象和辐射计系统在1.1毫米(阿兹特克)和3毫米(RSR)进行观测，以指导灵活安排观测时间。在这里，我们报告了在2013年6月至2016年4月期间使用该辐射计在225 GHz处测量的大气不透明度。这些测量表明，LMT站点在12月、1月和2月最干燥的月份有25%的观测时间是不透明的，在同一时间有0：1.50%的良好天气条件，在整个旱季有80%的时间不透明，这使得它是一个非常方便的亚毫米/毫米天文站点。
The Large Millimeter Telescope Alfonso Serrano (LMT) is located in Puebla, Mexico, at an altitude of 4580 m. It is currently the largest single-dish telescope constructed to observe the Universe at wavelengths between 0.85 and 4 mm. Identifying interstellar molecules, exploring dense dark clouds, and understanding the properties of cold matter and interstellar dust in the local and distant Universe are among its main scientific goals. Since June 2013, the LMT has conducted four shared-risk early science campaigns* observing at 1.1 mm (AzTEC), and 3 mm (RSR) with the aid of a new meteorological and radiometer system to guide the flexibility scheduling of observing time. Here we report measurements of the atmospheric opacity taken with this radiometer at 225 GHz between June 2013 and April 2016. These measurements show that the LMT site has exceptional weather conditions with opacities < 0:06 25% of its observing time during the driest months of December, January and February, excellent weather conditions with opacities < 0:1 50% of the same time, and opacities below 0.28 80% of the time during the entire dry season, making it a very convenient site for sub-millimeter/millimeter astronomy.