TRES  

This IRAF package contains most of the software needed to reduce spectra from
the TRES Echelle Spectrograph which is on the 1.5-meter Tillinghast Reflector
on Mt. Hopkins in Arizona.  Type " mkpkg <arch>" to set the architecture of
the computer on which IRAF is running.  Options are ssun for Sparc Solaris,
redhat for Redhat Linux, macosx for Apple Macintosh computers running OSX,
and macintel for Apple Macintosh computers running OS X on Intel CPUs.
Type " mkpkg update" to produce binary executables in tres$bin.<arch>
The default is bin.generic if "mkpkg <arch> is not used.

Copy to most recent tresdata tar file, currently
ftp://cfa-ftp.harvard.edu/pug/iraf/tresdata20081014.tar.gz
and install it in in your IRAF tree.

Check out http://tdc-www.harvard.edu/instruments/tres/reduce.html to find
out how to process TRES data.

For a revision history, see the NEWS file.  Recent changes include:

TRES 1.1.4 December 18, 2008
        Fix GETTIME so that it is possible to get the current time
        Change GETTIME calls in processing tasks to get current time correctly
        In THARSET, add TIDSHIFT=0, TIDREF, and TIDMJD to FITS header
        In TTRES and THARSET, allow sequence number as reference spectrum
        In TEXTRACT1 and TFLAT1, resolve reference flat fields to dated file
        In TPROC and TCAL1, resolve reference ThAr to dated file
        Rewrite TFIB1 to use fewer string variables because limit was hit

TRES 1.1.3 December 11, 2008
	Add parameters to TFIB1 for more complete database creation
	Add program selection by number to TRSLIST and TRSGROUP
	Make @ optional for list file input to CTRES, FTRES, and TTRES
	Print observing program as last column in database files
	Handle negative times (such as HA) correctly in GETTIME
	Add TRSPEC task to search TRES database for specific object,
	  program, apfib
	Add TDATE task to set TRES parameters for current directory if
	  raw or quicklook
	Add deltemp parameter to TSETBCV task
	Update help files
	Return nfiles parameter from TRSSUM, TRSAVG, and TRSMED
	Return null string from TRSSUM, TRSAVG, and TRSMED if nfiles=0
	Return imput image as outfile from TRSSUM, TRSAVG, and TRSMED if nfiles=1
	In TPROC, do not process summed file if only one input file
	Fix bugs in FILEPATH and TFIB1 to deal with missing and zero-length files
	Fix TRSLIST and TRSFILES to deal better with missing and zero-length files
	Deal correctly with single file lists in TMAKEFLAT

TRES 1.1.2 November 5, 2008
	Add new task TCHECK to avoid running quick look in raw data directory
	If TRSPROC, QTRES, CTRES, FTRES, or TTRES run in raw directory, switch
	  to quick-look directory for date, process, and return (2008-10-16)
	Default saveraw to yes in QTRES, CTRES, FTRES, and TTRES
	Add saveraw parameter to TRSPROC and default to no
	Fix TQUICK so it works
	Add optional datedir parameter to TDATA
	Add threshold parameter to CTRES, FTRES, CTRES, and TPROC to
	  remove cosmics better (2008-10-15)
	Add feature to TPROC to interactively refit a spectrum specified by
	  the new compstd parameter and turn it into a local shift standard
	Add compstd parameter to TTRES (2008-10-16)
	Set pemsao.vel_corr="none" in THARPLOT (2008-10-23)
	Add quickdir parameter to TCHECK (2008-10-24)
	TDATA will go from a quick look directory to raw data of same date
	TQUICK will go from a raw data directory to quick look of same date
	Add TSETBCV to set barycentric velocity correction and HJD midtime (2008
-10-27)
	Call TSETBCV from TPROC so all pipelined files have BCV in their header 
(2008-10-27)
	In TCOSBAD, avoid dividing by zero (2008-10-28)
	In TCOSMIC, add null string value arguement to HEDIT when deleting keywo
rds
	In TRSSUM, TRSMED, and TRSAVG, update image header parameters
	Fix current time bug in GETTIME (2008-1104)
	In TRSSUM, TRSAVG, and TRSMED, compute positions only for OBJECT(2008-11105)

TRES 1.1.1 September 25, 2008
	In TFLAT/TFLAT1, always use local normalization file if it is there
	Add nsmooth parameter to THARPLOT and default it to zero
	In TFLAT, assign saveold to sv to fix bug
	Add TFLATSET to copy FLAT images and database/ap entries to standard
	In THARSET, record original file date directory and name

TRES 1.1.0 September 19, 2008
	Add RVSAO RVRELEARN to TRELEARN
	This is a new release because RVSAO rvsao.cl has a new parameter
	to better keep track of versions and because calibration shifts work.
	Change GETTIME datediff in days to timediff in hours
	Add TDATA task to go to current raw data directory
	Add TQUICK task to go to current quick-look directory (using TRSDATE)
	Add option to use medan pixel shift in TCAL1 instead of mean with a
	  new parameter, medshift in TTRES, CTRES, TPROC, TCAL, and TCAL1

TRES 1.0.8 September 12, 2008
	Add debug and xdebug parameters to TCAL, xdebug to TCAL1 for pxcsao
	 debugging mode
	TREFIT is a new task to refit calibration lines without intervention
	In CTRES, plot ThAr spectra with THARPLOT
	In TAPREF, copy reference image and database file instead of linking
	Fix bug in TMODID to avoid double shifting
	Add TRSDUMP to save all relevant pipeline task parameters in one file
	Add input pixel shift to TCAL and TCAL1

-Doug Mink, 2008-12-18