GEMINI (Jan2004)	Gemini IRAF package v1.5	GEMINI (Jan2004)

Release date: January 9, 2004

This document describes the revisions relative to the Gemini IRAF package v1.4. 

This version of the Gemini IRAF package requires IRAF V2.12.2.

PRIMARY REVISIONS:

1) Tasks have been ported to IRAF 2.12.2.
2) New mkpkg supporting configuration for multiple architectures.
3) New package for mid-IR imaging data (gemini.midir).
      This new package offers support for T-ReCs and Michelle data.
4) New tasks.
5) New functionalities/parameters.
      In particular, the GMOS package now supports GMOS-South data, with the
      exception of GMOS-S IFU data which are not supported with this release.
6) Bug fixes


DETAILS OF THE REVISIONS:

1) Port to IRAF 2.12.2

   All the gemini package tasks are compatible with IRAF 2.12.2.  The following 
   tasks had to be modified to reflect the changes in IRAF 2.12.2:

     gemtools.gemoffsetlist	gemtools.gemcombine
     gemtools.imcoadd	   	gemtools.gemhedit
     gemtools.wmef	   	gemtools.gemseeing

     gmos.gbpm             	gmos.gmosaic
     gmos.gdark 	   	gmos.gprepare
     gmos.gfapsum	   	gmos.gsappwave
     gmos.gfcombine	   	gmos.gscalibrate
     gmos.gfcopy	   	gmos.gscrmask
     gmos.gfextract	   	gmos.gscut
     gmos.gfresponse	   	gmos.gsflat
     gmos.gfskysub	   	gmos.gsreduce
     gmos.gftransform	   	gmos.gsskysub
     gmos.ggain 	   	gmos.gsslitfunction
     gmos.giflat	   	gmos.gstransform
     gmos.gireduce	   	
  
     niri.meanvar          	niri.nscut
     niri.nifastsky	   	niri.nsextract
     niri.niflat	   	niri.nsflat
     niri.niflat	   	niri.nsreduce
     niri.nireduce	   	niri.nssdist
     niri.nisky 	   	niri.nsslitfunction
     niri.nprepare	   	niri.nsstack
     niri.nsappwave	   	niri.nstelluric
     niri.nscalibrate	   	niri.nstransform
     niri.nscombine		niri.nswavelength
     
     flamingos.fprepare
     
     oscir.obackground
     oscir.oflat
     oscir.oreduce

     quirc.qfastsky            quirc.qreduce
     quirc.qflat	       quirc.qsky

2) New mkpkg

   This GEMINI external package can be configured for various architectures, a
   functionality common to most external packages.  Before compiling, the
   package should be configured by typing: mkpkg -p gemini <arch>, where <arch>
   is the architecture.  See gemini.readme and the mkpkg file itself for more
   details.

3) New MIDIR package

   Basic support for the reduction of imaging data from T-ReCS and Michelle is 
   now available.  The tasks included in this release are listed below.  Please
   note that "miflat" should be used only on T-ReCS data.
   
   Michelle Specific Tasks:
      mprepare - Prepare Michelle data for further reduction with the MID-IR 
                 tasks. 
      mview - Interactively view each frame in a Michelle file; allows user to 
              mark nodsets as "bad".

   T-ReCS Specific Tasks:
      tbackground - Performs statistics on frames in a T-ReCS file; allows user 
                    to mark nodsets/savesets as "bad".
      tcheckstructure - Checks the structure of a T-ReCS file.
      tprepare - Prepare T-ReCS data for further reduction with the MID-IR tasks.
      tview - Interactively view each frame in a T-ReCS file; allows user to 
              mark nodsets/savesets as "bad".

   Imaging:
      miflat - Derive flat field and bad pixel mask for MID-IR images; miflat 
               does not apply the flat field correction.  (T-ReCS data only.)
      miregister - Registers and stacks the nod images within a given data file.
      mireduce - Reduce images from MID-IR Instruments (Bad pixel correction, 
                 stacking, flat field)
      mistack - Performs a straight stack of the nod images within a given data 
                file.
      miview - View MID-IR data frames that have been mprepared or tprepared.


4) New tasks
   
   gmos.gifringe - Derive fringe frame for GMOS images
   gmos.girmfringe - Subtract fringe frame from GMOS images
   gmos.gnscombine - Combine Nod-and-Shuffle GMOS data frames into a master 
                     frame
   gmos.gsdrawslits - Draw slits from MDF on a GMOS image
   gmos.mostools.mdfplot - Plot Mask Definition File
   
   niri.nsressky - Script to remove residual sky from NIRI longslit spectra.
   
   midir: New package. See item 3)

5) New functionalities/parameters

   gemtools.gemcombine:
       - Allows rejection with only 2 input images.
       - Parameter nkeep now defaults to 1 rather than 0.

   gemtools.gemseeing:
   gemtools.imcoadd:
      - Support for GMOS-S.
   
   gmos.gdisplay:
      - Support for GMOS-S, 6-amplifier mode, and all readmodes
      - New "output" file parameter.
   
   gmos.ggain:
   gmos.gprepare:
   gmos.gsappwave:
   gmos.gsextract:
   gmos.gsskysub:
      - Support for GMOS-S.
   
   gmos.giflat:
      - Support for GMOS-S and 6-amplifier mode.
      - New parameters: fl_bias, fl_trim
      - New functionalities: 
           o The user can select whether or not the images should be 
	     bias-subtracted or trimmed.
	   o A new type of rejection algorithm is offered (crreject).
   
   gmos.gmosaic:
      - Support for GMOS-S and 6-amplifier mode.
      - Modified logfile output for rotations.
   
   gmos.gnsskysub:
      - Support for 6-amplifier mode.
   
   gmos.gscut:
      - Support for GMOS-S.
      - New parameter for extra slit width for MOS (yadd).
   
   gmos.gsflat:
      - Allow detector by detector fitting.
   
   gmos.gsreduce:
      - Allow flatfields with 3 science extensions to match the new gsflat
        functionality.
   
6) Bug fixes

   Various minor bug fixes have been done all over the package.  Below is a
   truncated list summarizing a few of the most relevant ones from a user's
   point of view.

   gemtools.gemhedit:
       - Fix a segmentation violation problem under Linux7.3

   gmos.giflat:
       - Fix normsec and statsec to work for any binning and number of
         amplifiers.

   gmos.gireduce:
       - Fix a segmentation violation problem under some Linux systems.
       - No longer crash when no flats are found.

   gmos.gmosaic:
       - Fix handling of WCS.