External Resources
The following FTP sites make the Tycho-2 catalog available as 19 gzipped files. After retrieving them and the index.dat file, combine the gzipped files into catalog.dat. The resulting files will differ from the files on the CD-ROM in that they will end lines with only a linefeed, while the CD-ROM version for which WCSTools software was written terminates lines with a carriage return and a linefeed. Add the carriage returns back to the files using the unix2dos -ascii command.
Put the catalog.dat and index.dat files in a subdirectory data/ to the directory pointed to by the TY2_PATH environment parameter or the ty2cd variable in libwcs/ty2read.c.
- Centre de données astronomiques de Strasbourg
Read more about this topic: Tycho-2 Catalogue
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