Документ взят из кэша поисковой машины. Адрес оригинального документа : http://xmm.vilspa.esa.es/sas/7.1.0/doc/ekstest/ChangeLog Дата изменения: Fri Aug 11 20:05:37 2006 Дата индексирования: Sat Dec 22 07:57:07 2007 Кодировка:

ChangeLog for ekstest
===============================

Open SPRs:

Version 2.2.5 - 2006-08-11 (NW)
----------------------------

Changes made to the chi-squared test (now similar to IMS's lcchi2).


Version 2.2.4 - 2006-06-13 (NW)
----------------------------

Change made to the chi-squared test (documented in the documentation
and the commented in the source code) as the reduced chi^2 values were
somewhat shifted from the expectation values in tests made with 2XMM.


Version 2.2.3 - 2006-03-14 (NW)
----------------------------

Changed the version of ssclib in the DEPEND file for the release
track version.


Version 2.2.2 - 2006-03-07 (NW)
----------------------------

Following SSC-SPR-3591 and tests carried out by AS and NAW it appears
that the incommplete gamma function available in the ssclib gives more
consistent results than the gamma_function_Q used originally in this
task and thus is now used in ekstest.


Version 2.2.1 - 2006-02-03 (NW)
----------------------------

Shortened the comments to the keywords: KVSVSTAT, KVSVPROB,
CHI2PROB, FLARE, VARIATIO to have less than 40 characters,
following SPR-3578, where it was noted that the the comments
were too long for the available space.


Version 2.2 - 2005-09-14 (NW)
----------------------------

Modified the chi-squared test as it was producing a negative
chi-squared statistics and thus incorrect probabilities, in
response to SSC-SPR-3516, Task generates negative chi-sq statistic.
This occurred for datasets that were almost uniquely negative.
To rectify the problem, when calculating the chi-squared statistic,
the (O-E)**2 is divided by the absolute value of the Expected value.


Version 2.1 - 2005-04-19 (NW)
----------------------------

Updated the documentation to make it clear that no variability
tests are carried out if there are insufficient good bins.

Version 2.0 - 2004-11-26 (NW)
----------------------------

Added several new variability tests (flare and variation tests)
along with parameters to control these tests. The chi-squared
test has been modified by S. Mateos. The documentation has been
rewritten.

Version 1.3.6 - 2004-09-03 (NW)
----------------------------

Small code change so that ekstest deals with the NULLS in the same
way as elcplot (version 1.2.6).

Version 1.3.5 - 2004-08-13 (NW)
----------------------------

Small code change - now keeps background counts = 0.0 as well.

Version 1.3.4 - 2004-08-10 (NW)
----------------------------

Added missing line necessary to stop the new header information
being written into the given input file (only written to a new
file). Also changed error calculation for the total counts, when
they are recovered from the net and background counts.

Version 1.3.3 - 2004-08-09 (NW)
----------------------------

This version makes sure that ONLY the NULL values are taken out
and not the 0.0 values as well. Ekstest also tests to make sure
that total counts are not negative (whatever the nature of the
input file) and also raises an error if no screen output is
requested and nor is a new output file specified. The
documentation has also been updated.


Version 1.3.2 - 2004-08-02 (NW)
----------------------------

This version now keeps all negative net counts.


Version 1.3.1 - 2004-07-27 (NW)
----------------------------

The kolmogorov-smirnov test code has been revised (now based on
numerical recipes code) and a new boolean parameter (twodists) has
been introduced so that the user can choose to carry out a two
distribution KS-test (counts verses background) or a single
distribution KS-test (net counts). Some warnings have been
revised. The documentation has been updated.


Version 1.3 - 2004-07-01 (NW)
----------------------------

- Ekstest can now write a new file (with the results contained in
the header of the new file rather than the original file) and/or
write the results to the screen. The documentation has also been
updated.

Version 1.2 - 2004-06-14 (NW)
----------------------------

- Updated DEPEND file so that ekstest builds correctly.

Version 1.1 - 2004-05-28 (NW)
----------------------------

- Made the GTI file parameter an optional one as well as checking
whether the input file contains the background subtracted
lightcurve or the unsubtracted lightcurve. If it is background
subtracted ekstest calculates the unsubtracted lightcurve (and the
associated errors) to use for the variability test. Also changed
the Makefile and the test so that both the test harness and the
dependency checks are passed in the SAS build, as well as updated
the documentation.



Version 1.0 - 2004-05-19 (NW)
----------------------------

- Ekstest, a version of lcplot which contains only the variability
tests and namely the kolmogorov-smirnov test, where the results
are written directly into the header information.




Version 0.1 - 2004-05-14 (NW)
----------------------------
- Directory structure created by pkgmaker.