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Post Info TOPIC: Mount Zijin Observatory


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Xuyi Observational Station
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Title: Atmospheric Extinction Coefficients and Night Sky Brightness At the Xuyi Observational Station
Authors: H.-H Zhang, X.-W. Liu, H.-B. Yuan, H.-B. Zhao, J.-S. Yao, H.-W. Zhang, M.-S. Xiang

We present measurements of the optical broadband atmospheric extinction coefficients and the night sky brightness at the Xuyi Observational Station of Purple Mountain Observatory (PMO). The measurements are based on CCD imaging data taken in the Sloan Digital Sky Survey g, r and i bands with the Xuyi 1.04/1.20m Schmidt Telescope for the Xuyi Schmidt Telescope Photometric Survey of the Galactic Anti-center (XSTPS-GAC), the photometric part of the Digital Sky Survey of the Galactic Anti-center (DSS-GAC). The data were collected in more than 130 winter nights from 2009 to 2011. We find that the atmospheric extinction coefficients for the g, r and i bands are 0.70, 0.55 and 0.38 mag/airmass, respectively, based on observations taken in several photometric nights. The night sky brightness determined from images of good quality has median val- ues of 21.7, 20.8 and 20.0 mag/arcsec2 and reaches 22.1, 21.2 and 20.4 mag/arcsec2 under the best observing conditions for the g, r and i bands, respectively. The relatively large extinction coefficients compared with other good astronomical observing sites are mainly due to the relatively low elevation (i.e. 180 m) and high humidity of the Station.

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RE: Mount Zijin Observatory
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CAS astronomers discover 19 asteroids in two months
By taking advantage of newly-established astronomical equipment, researchers with the CAS Purple Mountain Observatory discovered a near-earth objective (NEO) on 10 April, making the total of similar findings to 19 within the past two months.

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Tests have been completed on China's Schmidt telescope, which is designed to detect near-earth objects (NEO) that could threaten the planet.
The telescope, measuring one meter in diameter, was tested by scientists at the Mount Zijin Observatory (Purple Mountain Observatory) under the Chinese Academy of Sciences, in the suburb of Huai'an city of east China's Jiangsu Province.
It is the fist telescope in China specialised in NEO observation and one of only six, one-meter NEO observation telescopes in the world.

Source Xinhua

Latitude: 3204'N; Longitude: 11849' E

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