ChangeLog for eposcorr
======================

Version 3.13 - 2018-02-13 (EO)
------------------------------
	+ This is a new major version of this package including a new GNU
	Public License Text disclaimer required to distribute the SAS source
	code to the Astronomical Community under the terms of the GNU Public
	License. The text as it is shown below is the same that has been 
	included in all SAS source code files.

	ESA (C) 2000-2018 

	This file is part of ESA's XMM-Newton Scientific Analysis System
	(SAS).

	SAS is free software: you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation, either version 3 of the License, or
	(at your option) any later version.

	SAS is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.
	   
	You should have received a copy of the GNU General Public License
	along with SAS.  If not, see <http://www.gnu.org/licenses/>.
	---------------------------------------------------------------------


Version 3.12.2 - 2012-03-28 (IT)
------------------------------
	+ Coordinates in match table: X_RA and X_DEC are set to the
          coordinates in the input X-ray source list (instead of
  	  intermediate results; SPR-6635).
	+ Optical input source list: RA, DEC, and RADEC_ERR columns
	  can be given in single or in double precision (user request
	  in March 2012; SPR-6701).
	+ Updated documentation.

	
Version 3.12.1 - 2008-05-09 GL
-----------------------------------  

Correct an error with using the parameter rawxsyserr,
introduced in v 3.9.2.
Close SOC-SPR 6436 (SSC-SPR 3701).

	
	
Version 3.12 - 2007-05-25 GL
-----------------------------------  

Fixed documentation.

	
Version 3.11 - 2006-05-23 GL
----------------------------------- 

Copy of 3.9.3 for SAS 7
	
	
Version 3.9.3 - 2006-02-07 GL
-----------------------------------

Updated documentation


	
Version 3.9.2 - 2005-06-21 GL
-----------------------------------

Changed column names containing "-" in match table:
 X-INDEX -> X_INDEX
 X-RA ->    X_RA
 X-DEC ->   X_DEC
 O-INDEX -> O_INDEX
 O-RA ->    O_RA
 O-DEC ->   O_DEC

 Look for RA_PNT/DEC_PNT in both PRIMARY array and source list extension.	
 Write axis information of the likelihood image as physical coordinate system.
 (see SSC-SPR-3305) 

 Improve efficiency by a large factor 
   a) by reusing results of rotational coordinate transformations.
   b) by reducing the input list to 1 row per source already on
      reading the source list.
 Write likelihood bias expected due to optical background source density 
   into keyword LIK_NULL of the corrected source list.
  (see SSC-SPR-3493)
 Update test harness
	

	
Version 3.10 - 2004-03-19 GL
-----------------------------	

Fixed problem that caused segmentation fault, when
no error column was present in optical catalogue.

Version 3.9.1 - 2002-03-02 GL
-----------------------------

Change coordinates in matchtable to double precision.

Version 3.9 - 2002-12-08 GL
-----------------------------

Make use of param v2 features in .par file


Version 3.8 - 2002-10-29 GL
-----------------------------

Update DEPEND
Created lyt  file
Changed info file
Closed SPR:
+ SSC-SPR-2926  misleading duplicate error code.

	
Version 3.7 - 2002-05-24 GL
-----------------------------

Based on v3.4.2
+ Converted .par file to XML
	
Version 3.4.2 (2002-05-15) HB
-----------------------------

New task parameters added:
rawxsyserr,r,h,1.5,,,"systematic error of input X-ray positions"
minxsyserr,r,h,0.2,,,"irreducible systematic error of X-ray positions"
maxsig,r,h,5.0,,,"sigma cutoff for X-ray/optical matches"
usemaxsig,b,h,yes,,,"use sigma cutoff limit"

maxposnerr internally multiplied by sqrt(0.5) to achieve consitency
  with RADEC_ERR values
	
Closed SPR:
+ SSC-SPR-2863 inproperly fixed SPR 2830 corrected
	
Version 3.6 (2002-04-20) HB
---------------------------	

Closed SPR:
+ SSC-SPR-2830 Number of matches does not account for multiple rows

Version 3.5 (2000-01-28) HB
---------------------------

-Error in parameter file corrected	
	
Version 3.4 (2001-10-17) HB
---------------------------

-error in the test harness corrected	
	
Version 3.3 (2001-10-13) HB
---------------------------

-units of RA, DEC, and error columns now read from source table
-position error column no longer required
-optional output of table containing matched sources with distances and 
 likelihood contributions for each matched pair
-RA, DEC offsets and rotation angle can optionally be specified as 
 input parameters instead of being determined by the programme	
-column names for R and B magnitues now specified by input parameter
 	
Version 3.2 (2001-08-13) HB
---------------------------

Closed SPRs:	  
+ SSC-SPR-2486 Fails to compile with NAG F95 4.1
+ SSC-SPR-2357 Allow correlating X-ray sources with one another
+ SSC-SPR-2316 SCR 56task puts too many restrictions on input file
	
Version 3.1.1 (2001-06-01) HB
-----------------------------	

Closed SPR:
+ SSC-SPR-2414 broken link in HTML doc	
	

Version 3.1 (D.M., September 22., 2000)
----------------------
	+ Possibility to reduce positional error by only considering
	  strong sources with low positional error: Parameter maxposnerr

Version 3.0 (JV, Juli 21, 2000)
----------------------	
	+ Possibility to search for rotational errors added (but is still slow)
	+ Parameters added/changed
	
Version 2.0.1 (JV, June 16, 2000)
----------------------	
	+ missing info file added
	+ changed the internal error representation as there was a discrepancy
	between documentation and code.
	+ as a consequence the test harness had to be changed as well
	
Version 2.0 (JV, June 2000)
----------------------	
- Changed the names of keywords added by eposcorr to the source list data set.
- Added some additional keywords.
- Parameters added in order to select R and B magnitudes from the input optical
	set.
	


Version 1.1
----------------------	
- The task has been updated to work properly with the latest summary srclists.
  See SSC-SPR-1272, 1273, 1274
- Added a keyword describing the approximate error in the position correction
  applied.
	


Version 1.0
----------------------------	
Remarks about this version.

This version is similar to v 0.1, but I have changed
the test files and removed the *.cc files.
See SSC-SPR-1253, SSC-SPR-1248, SSC-SPR-1129, SSC-SPR-1117.

Open SPRs:
SSC-SPR-1253
	
 - 1234

	

	
Version <next version>
----------------------

Remarks about this version.

Open SPRs:

 - 1234

	
Version 0.1
----------------------------

- Directory structure created by pkgmaker.