... The M87 jet is experiencing extreme optical/UV variability and very high energy emission that were never anticipated. ... This is an unprecedented event that has only been observed in the M87 jet and has serious implications for models of jet variability and unified schemes of AGNs. ... Similarly, all three major Cherenkov observatories studying very high energy gamma-rays reported flaring of M87 in the very high energy regime in 2005, 2008, and 2010. ... today * ATNF | ...
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
... 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 ...
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Ссылки http://www.atnf.csiro.au/research/masermeeting/web_papers/523_Rudnitskij.pdf -- 481.0 Кб -- 26.04.2007 Похожие документы