First observations of the water masers with the Urumqi 25m radio telescope

	First observations of the water masers with the Urumqi 25m radio telescope
	Zheng, XW ; Esimbek, J; Zhou, JJ
	2001-10-01
Source Publication	SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY
ISSN	1006-9283
Volume	44 Issue:10 Pages:1356-1360
Abstract	A new radio spectral receiving system has been installed on the 25 rn radio telescope of the Urumqi Astronomical Observatory. The back end is a surface acoustic wave chirp transform spectrometer (SAW CZT), used for the first time in radio astronomy. The calibration of the line observations has carefully been investigated for the new-type spectrometer. In order to test the feasibility of the prototype spectrometer, we observed water maser emission from a number of known Galactic sources. We describe the observed spectra of W49N, W3(OH), 2248 + 600 and 1909 + 090. We found that W49N spectrum showed high-velocity features ranging from - 330 to 146 km s(-1). In comparison with the spectra observed by Medicina, the feature at the LSR velocity - 52 km s(-1) in the W3(OH) presented the rapid variation in flux density.
Keyword	Astronomical Technique-calibration Of The Line Observation Hii Regions-ism : Masers
Subtype	Article
Subject Area	恒星和恒星物理
WOS Headings	Science & Technology ; Physical Sciences
Indexed By	SCI
Language	英语
WOS Research Area	Mathematics
WOS Subject	Mathematics, Applied ; Mathematics
WOS ID	WOS:000172008800016
Funding Organization	National Natural Science Foundation of China (Grant Nos. 10073004);the Joint Laboratory of Radio Astronomy,the Chinese Academy of Science
Citation statistics	Cited Times:1[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.xao.ac.cn/handle/45760611-7/111
Collection	射电天文研究室_恒星形成与演化研究团组射电天文研究室
Affiliation	1.Nanjing Univ, Dept Astron, Nanjing, Peoples R China 2.Chinese Acad Sci, Urumqi Astron Observ, Urumqi 830011, Peoples R China
Recommended Citation GB/T 7714	Zheng, XW,Esimbek, J,Zhou, JJ. First observations of the water masers with the Urumqi 25m radio telescope[J]. SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY,2001,44(10):1356-1360.
APA	Zheng, XW,Esimbek, J,&Zhou, JJ.(2001).First observations of the water masers with the Urumqi 25m radio telescope.SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY,44(10),1356-1360.
MLA	Zheng, XW,et al."First observations of the water masers with the Urumqi 25m radio telescope".SCIENCE IN CHINA SERIES A-MATHEMATICS PHYSICS ASTRONOMY 44.10(2001):1356-1360.

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