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http://www.atnf.csiro.au/people/Matthew.Whiting/papers/crab_AO.pdf.

1. Circinus_galaxy
... A typical spectrum (such as Figure 1) shows the classic triple-peaked spectrum, which is associated with masers located in a circumnuclear disk (e.g. NGC 4258, Nakai et al., ... The Circinus galaxy megamasers are known to be variable on timescales of weeks and months with individual maser features having a lifetime of around one year. ... Most of the masers observed showed some degree of variability over an hour while one feature displayed a doubling of its flux density over about 10 minutes. ...
[ Сохраненная копия ]  Ссылки http://www.atnf.csiro.au/news/newsletter/jun03/Circinus_galaxy.htm -- 8.9 Кб -- 23.01.2013
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2. http://www.atnf.csiro.au/research/masermeeting/web_papers/523_Rudnitskij.pdf
... Twenty-Six Year Monitoring of Water Masers IAU Symposium 242, Alice Springs 1 Contents of the work A sample of H2O maser emission sources has been observed since 1980. ... Rudnitskij et al. ... Twenty-Six Year Monitoring of Water Masers IAU Symposium 242, Alice Springs 4 Maser in a protoplanetary disc (S255) Flux density, Jy S255: H2O line profile 5 February 2002 Radial velocity, LSR, km/s Rudnitskij et al. ... Twenty-Six Year Monitoring of Water Masers IAU Symposium 242, Alice Springs 12 ...
[ Текст ]  Ссылки http://www.atnf.csiro.au/research/masermeeting/web_papers/523_Rudnitskij.pdf -- 481.0 Кб -- 26.04.2007
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3. http://www.atnf.csiro.au/iau-comm31/pdf/Leap%20Second.pdf
metrologia The leap second: its history and possible future R. A. Nelson, D. D. McCarthy , S. Malys, J. Levine, B. Guinot, H. F. Fliegel , R. L. Beard and T. R. Bartholome w Abstract. This paper reviews the theoretica l motivatio n for the leap second in the context of the historica l evolutio n of time measurement . Th e periodic insertio n of a leap second step into th e scale of Coordinate d Universal Time (UTC) necessitates frequent changes in comple x timekeepin g systems an d is currentl y th e
[ Текст ]  Ссылки http://www.atnf.csiro.au/iau-comm31/pdf/Leap%20Second.pdf -- 382.0 Кб -- 26.09.2010
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