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2.2.2 The Input Data File

The required structure for input data file is:

parameter line
setup star #1
setup star #2
target record for central object (or position)
target record for additional objects - repeated as required
...
...
...
last target record
blank line as eof

The parameter line looks like:

'PNAME' NPLATE SKYRAD DX PA1 PA2 EXTEN DEXT NEXT EPOCHIN

where the parameters and their default values are:

 
Default     Parameter  Description
 NONAME	     PNAME        Plate or field name, should have no more that 10 characters
		          and must be surrounded by '  ' (apostrophes). Upper case only.
 1           NPLATE       Number of plates (masks) for this field. Crowded fields may require
	                  more than one mask per field.
 7.5         SKYRAD       The slit half-length in arcsecs.
 0.400       DX           The minimum inter-slit separation, i.e. edge-to-edge distance, in mm.
                          The default is recommended to avoid overlap.
 0           PA1          Low end of the range of PA (degrees) to be searched; if a given PA
                          is needed, set PA1=PA2.
 180         PA2          High end of the range of PA (degrees) to be searched; if a given PA
                          is needed, set PA1=PA2.
 T           EXTEND       Flag for extending the length of object slitlets on the mask.
                          As described in section 2.2.3, the extension will be done only
                          for those objects with EFLAG=0.
 0.5         DEXT         Incremental step size for slit extension, in arc-secs.
 7           NEXT         The maximum number of extension steps at  each end  of a slit.
 2000.0      EPOCHIN      Epoch of the input coordinates

The following is a template file available on BigX in /u1/deveny/mslit/mslit/bin/cdfmt for the setup star and target object data:

 ******** SAMPLE RECORD FOR MSLIT PROGRAM ********
   where:  X = blank, n = number, t = text

   NUM     OBJNAME                 RH RM RS.S    DD DM DS.S  WT          E
XXXnnnXXXXttttttttttXXXXXXXXXXXXXXXnnXnnXnn.nnXX-nnXnnXnn.nXnnnn.nXXXXXXXn/ 
123456789012345678901234567890123456789012345678901234567890123456789012345
0        1         2         3         4         5         6         7



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Next: A Sample Input File
Previous: How Does The Program Work?

kessel@noao.edu
Updated 18Apr1996