NAME:    
	dbcreate_rosat
  PURPOSE: 
	read rosat data tables into a database
  CALLING SEQUENCE: 
	dbcreate_rosat, datfile, txtfile, db_out
  INPUTS: 
	file: name of file to be read
  OUTPUTS: 
    	db_out: string array, name of output database. 
       A db_out.dbd file should exist already.
	Note that as dbd files are in subdir dbase within pro, should have:
	db_out='dbase/db_outname'.
  EXAMPLE: 
	dbcreate_rosat, '/data/cass101a/s.aigrain/rosat/rosat-ned.dat',$
		'/data/cass101a/s.aigrain/rosat/lehmann-tables.txt',$
		'dbase/rosatdb'
  DEPENDENCIES: 
	db_out.dbd file must exist and be correct
  RESTRICTIONS: 
        UNTESTED
  CALLED PROCEDURES AND FUNCTIONS: 
	astrolib functions
  MODIFICATION HISTORY: 
     	29-Nov-1998  Original by Richard McMahon
     	12-Oct-2000  Modified by Suzanne Aigrain

(See /home/xmmssc/soft/idl/pro/dbcreate/dbcreate_rosat.pro)