... Interactive Catalogs - . ... The Parkes multibeam system was used for numerous large-scale HI surveys (e.g. HIPASS and HIZOA) from which the respective science teams extracted galaxy catalogs some of which are made available here. ... P ublished Catalogs: . the `HIPASS Bright Galaxy Catalog' (HIPASS BGC) by Koribalski et al. (2004) . the `HIPASS Catalog' (HICAT) by Meyer et al. (2004) and Zwaan et al. 2004) . ... RA (J2000) Fitted HI position (hms) . DEC (J2000) Fitted HI position (dms) . ...

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