Dear SeeSaters For those of you who haven't heard, the Tycho data from the ESA Hipparcos satellite has been reprocessed, resulting in a new catalogue called Tycho-2 containing the positions and magnitudes of 2,539,913 stars. It is claimed to have a cleaner cutoff than the first Tycho catalogue, at around mag +11.5. It comes on a CD-ROM in one uncompressed file of 515Mb. Proper motions have been derived from a new analysis of no fewer than 144 ground-based catalogues. The documentation that came with my CD-ROM tells me that the catalogue can be retrieved from CDS through anaonymous ftp, and can be queried using the VizieR service at <http://vizier.u-strasbg.fr/cgi-bin/VizierR?-source=Tycho2>. It is also available from the Aladin interactive sky atlas <http://aladin.u-strasbg.fr/> or through the ESO skycat tool <http://archive.eso.org/skycat/servers/ASTROM>. It has its own website at <http://astro.ku.dk/~erik/Tycho-2>. Regards to all David. David M Brierley Malvern, Worcestershire, UK Station 2675, 52.1358N 2.3264W 70m -- The Information contained in this E-Mail and any subsequent correspondence is private and is intended solely for the intended recipient(s). For those other than the recipient any disclosure, copying, distribution, or any action taken or omitted to be taken in reliance on such information is prohibited and may be unlawful. ----------------------------------------------------------------- Unsubscribe from SeeSat-L by sending a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@lists.satellite.eu.org http://www2.satellite.eu.org/seesat/seesatindex.html
This archive was generated by hypermail 2b29 : Mon Feb 14 2000 - 01:50:02 PST