Output format for
REFNET

Three possible output formats exist for the list of astronomical objects generated by REFNET.

  1. ASCII - This is the standard human-readable form. Below is a typcial example of how this form looks:
        RA            Decl.           Mag.      Radius     Angle
     hr mn sec     dec mn sec      Red  Blue    arcsec      deg
     
     00 00 02.546  -00 04 22.21   12.9e 13.0e   265.0      188.3
     00 00 04.171  -00 01 57.05   17.4  18.1    132.7      208.1
     00 00 04.715  -00 03 25.26   17.1  17.3    217.1      199.0
     00 00 04.821  +00 03 35.52   16.4  18.0    227.3      341.5
     00 00 06.007  -00 02 47.01   15.3  17.2    189.8      208.3
     00 00 06.895  +00 02 29.03   17.3  18.2    181.4      325.2
     00 00 07.334  -00 00 23.05   15.5   0.0m   112.4      258.2
    
    The "Radius" column is the distance from the center of the field-of-view to the object. The "angle" is the angle from the center of the field-of-view to the object where the reference line is from the center to North and the angle increases in the same sense as RA. In the 'Mag.' column, the letters following some of the magnitudes are flags indicating the reported magnitude is probably in error. The 'e' flag means that the value is probably too high. The 'm' value means that the value is missing or meaningless.
  2. IRAF - This format is suitable for generating images in IRAF. The 'mkobjects' task will accept files in this format and, when other parameters are properly set will generate an image similar to one taken from a real CCD. The focal length and pixel size of the simulated telescope must be included for this output style. A sample file format is should below:
    begin   refnet.out1                                                     
            spatial         uniform
            xmin            0.
            xmax            228.
            ymin            0.
            ymax            228.
            luminosity      powlaw
            power           0.6
            minmag          12.4
            maxmag          21.9
            nssample        100
            sorder          10
            sseed           1
            nlsample        100
            lorder          10
            lseed           1
            nstars          44
              42.68    12.89   14.400
             217.22    13.47   20.600
             176.18    19.03   16.200
             100.86    20.49   14.000
             131.54    24.49   20.600
             192.03    27.02   18.200
             115.88    30.09   12.400
              65.14    32.13   12.400
                .        .       .
                .        .       .
                .        .       .
    
    The number columns mean the following: column 1 is the CCD pixel number in the x direction; column 2 is the CCD pixel number in the y direction; column 3 is the magnitude.
  3. Catalog - The catalog file is in binary data file format. Each entry is composed of three 4-byte integers, and the byte order is the natural order for Silicon Graphics, Sun (and others), but will require the BIG_ENDIAN argument on IBM-PC, Digital Equipment Corp. and similar computers. This is the same format as was used for the UJ1.0. Each entry consists of three 4-byte integers, and the ordering is a follows:
    1. i*4: Integer RA
    2. i*4: Integer SPD
    3. i*4: Magnitudes and flags
    The integer RA is given in quanta of 1/100 arcsecond. Take the traditional hours of RA and multiply by (15*3600*100) to obtain the appropriate integer value. The integer SPD is given in quanta of 1/100 arcsecond. Take the traditional degrees of Dec, add 90 and multiply by (3600*100) to obtain the appropriate integer value. The decimal digits of the mag/flag word are:

    SQFFFBBBRRR
    where:


© Lowell Observatory 2008
Contacts: Ted Bowell and Bruce Koehn
Last modified: 2008 April 15