[vsnet-id 237] ROSAT-FSC TDF addendum

[no name <crawl@zoom.co.uk>]

The RASS-FSC TDF provided in vsnet-id 234 will work much quicker if the
commands

toler 2

and

sort 2

are placed on their own lines immediately after the command

epoch 2000

[if sort 2 doesn't work, try sort -2]!

These sort the file on declination ascending/descending, with a
tolerance of 2 degrees.  Try toler 3 to 5 if 2 still doesn't work.  For
some reason the RASS-FSC datafile is _nearly_, but not quite, sorted on
Dec from the north pole down.  [If you think that's strange, UCAC1 is
sorted in "south polar distance"!  Though at least it is _fully_
sorted!].

[I've re-sorted my personal datafile copy on RA anyway, so I can't test
this]!

Thanks to Bill Gray of Project Pluto for the above tips.

John

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