These notes are taken from UKIRT's IRCAM3 manual by Colin Aspin, and modified for WHIRCAM. A UNIX version of IRCAM_CLRED has also been recently written, called IRCAMDR.
Either log onto any of the Vaxstation terminals (LPVS3 or LPVS5) as user OBSERVER (get current password from SA or TO), or open another DECterm window on the WHIRCAM terminal, then type (where YYYYMMDD is the current year, month and date, eg 19960229):
ircam_setup set def DISK$IRCAM:[WHIRCAM.DATA.IRCAM_DATA.YYYYMMDD.RODIR] ircam_clred
You will be asked to supply the same ID as you entered under
IRCAM_DEV, a workstation number (always choose 18), the data
format (`NEW' for WHIRCAM data), the UT date relevant for the frames
taken (eg 960229), a filename suffix (choose `none') and the plate
scale (0.24 ''/pix for WHIRCAM direct).
The IRCAM Command Line REDuction system will now run up and present you with the IRCAM logo (on the graphics window) and the prompt:
You can, if you like, reduce the size of the DECterm windows to see the whole of the GKS graphics window by clicking on `Options' and selecting `Window' and clicking on `Condensed Font' then `Apply' and finally `OK'.
Once in IRCAM_CLRED, the system is setup to access the reduced observation files (prefixed by RO) in the current directory by their observation number alone.
NS 42 <CR>
DISP 42 41 <CR>to subtract 41 from 42 and plot the difference.
STDPHO 41 42 <CR>where observations 41 and 42 are the first two images of a faint standard (FS) 5-point mosaic (see § 6). The difference between the two images will be plotted and you will be asked to select the standard star with the cursor. The system will calculate a zeropoint and load it into the system.
STRED <CR>Below is an example of the input required by STRED.
Ircam-Clred > stred Current IRCAM file prefix = RO960229_ Current IRCAM file suffix = NONE Enter a PREFIX for the output image(s) Prefix |IMAGE_| ? field22_ Enter start observation number ? Start |1| ? 21 Enter number of images to be reduced ? Number of Images |1| ? 5 Enter the DARK image number : Dark number |1| ? 2 Observation specified as DARK is truly a DARK! CONGRATULATIONS, you did good!!! Do you want to MEDIAN FILTER the objects for a flat or use a SEPARATE pre-prepared (normalized) SKY image ? Median or Separate Sky (M,S) |M| ? Do you want the images airmass corrected ? Airmass Correction (Yes or No) |N| : y Do you want the images auto-mosaiced ? Mosaicing (Yes or No) |Y| : y Getting RA,DEC offsets from input images... Image RO960229_21 Image RO960229_22 Image RO960229_23 Image RO960229_24 Image RO960229_25 RA,DEC (modified) offsets in image sequence are : 0.000 0.000 0.656 -5.297 6.178 -5.124 6.268 0.379 5.633 5.411 Use these offsets or use user-defined telescope offset (ASCII) file ? File Offsets or User-defined (F,U) |F| ? Give name for FINAL mosaiced image : Final Image |X| ? field22_final
STRED then reduces the specified images and, if requested, puts together the final mosaic. Output images will be, as in the e.g. above,
FIELD22_21DFGA FIELD22_22DFGA FIELD22_23DFGA FIELD22_24DFGA FIELD22_25DFGA FIELD22_FINAL