There is a patch to STSDAS that affects CALWF3. If you are
using CALWF3, you should install STSDAS and then install
the patch.
Calwf3 v2.3 contains one minor and one major update.
1) The CopyFFile routine was enhanced to ensure that the FILENAME keyword
value in all output files produced by calwf3 always matches the actual file name.
2) The IR calibration step "zsigcorr", which is used to estimate the amount of signal
in each detector pixel in the zeroth read (the read the occurs immediately after the
pre-exposure reset) of an exposure, has been updated to fix a problem that
produced incorrect results for sub-array exposures. The estimated zeroth read
signal in sub-array exposures was being underestimated by factors of 2-4, due to
the fact that the effective exposure time of the zeroth read is variable across a
sub-array. The new algorithm no longers relies on the effective exposure time of
the zeroth read, so that accurate results are produced for sub-array exposures.
STSDAS Version 3.13 Release Notes
December 2010
This release of STSDAS contains changes to the pipeline code for nearly
all the instruments (STIS, NICMOS, WFC3 and COS). In addition,
the final software used by the ST-ECF to calibrate FOS data has been
included strictly as a record of the processing performed to generate
the FOS products available from the HST archive.
The specific changes are detailed in the following sections.
Platform Support
================
Binaries for this release were built on Red Hat Enterprise Linux 4
and 5, Solaris 5.8, and Mac OS X 10.4 (PPC and Intel architecture).
Binaries were built with IRAF 2.14, except for Solaris, which were
built with IRAF 2.12.2a. IRAF is available from http://iraf.net.
Solaris Support Ending
----------------------
This version will be the last version which will be tested against
Solaris. We will also no longer be building Solaris binaries for STSDAS
after this release, although the source code can always be downloaded
and compiled locally as needed.
64-bit IRAF Support
--------------------
IRAF 2.15 includes support for 64-bit systems. The changes necessary to
support 64-bits generally require applications to be modified. We will
only release 32-bit binaries fo the Tables and STSDAS packages for use
with IRAF 2.15. Support for 32-bit binaries will continue as long as
there are sufficient plaforms that such binaries will run on. We may
only convert some packages in Tables and STSDAS to 64-bit version when
the 32-bit versions are no longer viable and if created will be released
as a separate package with a different name. When the 32-bit versions
of TABLES and STSDAS are no longer viable, support for any tasks within
those packages not ported to 64-bits will end. The full description of
this policy can be found online at:
http://www.stsci.edu/institute/software_hardware/stsdas/iraf64
STECF Software
==============
This release contains the latest version of the stecf IRAF package for
supporting HST data that had been developed by members of the Space
Telescope European Coordinating Facility (ST-ECF) which closed on 31
December 2010.
The packages included in stecf are:
imres - Tasks used for photometric image restoration with unconstrained star
positions, simulating images with ground-based seeing and making
apodizing mask images.
impol - A package for imaging linear polarization mapping for data taken
using the polarimetry modes of HST instruments. An overview and
access to demos and help files is available at:
http://www.eso.org/~jwalsh/softpol/
specres - A package for point source extraction and background decomposition
of 2-D (longslit) spectra. An overview is provided at:
http://www.eso.org/~jwalsh/specres/
Support for these packages may be obtained by contacting the STScI Help
Desk at 'help@stsci.edu'. These questions will then be forwarded to the
package authors at ESO as required.
HST_CALIB
=========
WFC3
====
The WFC3 calwf3 task has been updated to version 2.2, which includes
the following changes:
- The IR ZSIGCORR calibration step has been modified to perform the zero read
signal calculation for all pixels, regardless of any data quality (DQ) flags
associated with the pixels. The previous version skipped the calculation for
pixels with a non-zero DQ value.
- The logic to check for the existence of some of the calibration
reference tables has been updated to provide useful error messages if
the tables can't be found.
- The logic for processing IR images has been updated to allow for re-entrant
processing, in which a given image is processed through calwf3 multiple times,
applying different sets of calibration steps in each pass.
- The logic used to execute the WF3REJ task from within calwf3, which is used to
combine multiple images from CR-SPLIT and REPEAT-OBS associations, has been
upgraded to skip the step for products that only have one existing member.
STIS
====
CALSTIS Version 2.32 (05-November-2010) has been updated for this release.
The changes include:
- There were several (internal) sets of functions for evaluating the
dispersion relation, its derivative, or its inverse. These have been
consolidated to one set of functions. A ninth term (spectral order
squared) has also been added to the dispersion relation; this term may
be used in the future for echelle data.
- Prior to Servicing Mission 4 (SM4), the reference temperature and the
slope of dark vs temperature for Side-2 CCD data were hard-coded. Both
the nominal temperature and the slope are different for post-SM4 data,
so the hard-coded values are not appropriate for recent data. The
reference temperature and slope are now recorded in the primary header
of the dark reference file, and calstis reads those values and uses them
when computing the scaling factor for the CCD dark image.
HSTCOS
=======
x1dcorr
-------
A new parameter has been added to indicate that x1dcorr should search
for the target spectrum in the cross-dispersion direction, rather than
relying on the keyword determined from wavecal processing. Other new
parameters allow the user to specify the extraction location and height.
NICMOS
======
runcalsaa
---------
Final updates were made to the PyRAF script 'runcalsaa' which gets used to
apply the SAA and bright-earth corrections to NICMOS data after calibration
by 'calnica'. These updates insured that all NICMOS data results in a
consistent set of calibrated products when fully processed.
markdq
------
Updated the markdq task to use all 15 DQ bits and updated some of the help
files to reflect the fact that markdq and ndisplay can be used on more
than just NICMOS images.
The following tasks and their help files were updated to allow them to be
used with WFC3/IR images as well as NICMOS data:
- mosdisplay
- pstats
- pstack
- sampinfo
IMGTOOLS
========
Updates were made to 'msstatistics' to fix ACS and WFC3 dq flag assignments. The help pages were also updated to include appropriate ACS, WFC3, and COS references.
DITHER
======
tweakshifts
-----------
The new parameter 'separation' has been activated in 'tweakshifts'
to allow the 'separation' parameter in 'xyxymatch' to be set. This
supports the use of closely spaced objects in the match.
