Contents of /ccfdev/packages/om-phottonat/ChangeLog

om-phottonat
===========

Version 0.9 - 2024-03-05 (SR)
-----------
        + Adds a new EXPDEGRAD extension which contains filter-dependent degradation coefficients that are now derived from
        simultaneous exponential fits to the Standard star data rather than 'constant' catalogue sources. This includes data
        of the standards taken at off-boreight/off-Jupiter patch locations for revs > 3224. This represents a MAJOR change of
        philosophy: it is (1) a move back to using standard stars and (2) it considers the decay as exponential with an
        asymptotic, non-zero residual throughput. The CCF retains the existing DEGRADATION extension containing the previous
        polynomial-based coefficients so as to maintain backwards compatibility, alongside an ALGOID=1 keyword so CAL task
        computes inverse of exponential model if =1 and polynomial correction function if absent. These changes were first
        implemented on 2023-09-15. Furthermore, this CCF contains another new extension (BORECORRFACTORS) that provides relative
        correction factors, for each filter, for extra degradation at the pn boresight. These factors, which apply only to sources
        observed at the pn boresight, are in tabulated form. The extension also contains the defined boreight region 

Version 0.8 - 2020-05-08 (SR)
-----------
       + Updating  DEGRADATION table coefficients with new ones derived from 
        observations of sources in the OM Catalogue SUSS4 
        A quadratic fit will be used.

Version 0.7 - 2018-04-04 (AT,EV)
-----------
       + Updating  DEGRADATION table coefficients with new ones derived from 
        observations of sources in the OM Catalogue SUSS3 
        A quadratic fit will be used.

Version 0.6 - 2016-04-14 (AT)
-----------
       + Updating  DEGRADATION table coefficients with new ones derived from 
        observations of sources in the OM Catalogue SUSS2.1 
        A quadratic fit will be used.

Version 0.5 - 2011-05-10 (AT)
-----------
       + Replacing DEGRADATION table coefficients with new ones derived from 
        all observations of BPM16274, Hz2 and GD153


Version 0.4 - 2005-03-07 (BC)
       + Added DEGRADATION table (derived from BPM16274 observations)

Version 0.3 - 2000-02-12 (UL)
-----------
        + added COINCIDENCE table (driving empirical coincidence loss correction)

Version 0.2 - 2000-02-10
-----------
        + calhb 0.4

Version 0.1 - 1999-09-17
-----------
        + in CVS.
1	om-phottonat
2	===========
3
4	Version 0.9 - 2024-03-05 (SR)
5	-----------
6	+ Adds a new EXPDEGRAD extension which contains filter-dependent degradation coefficients that are now derived from
7	simultaneous exponential fits to the Standard star data rather than 'constant' catalogue sources. This includes data
8	of the standards taken at off-boreight/off-Jupiter patch locations for revs > 3224. This represents a MAJOR change of
9	philosophy: it is (1) a move back to using standard stars and (2) it considers the decay as exponential with an
10	asymptotic, non-zero residual throughput. The CCF retains the existing DEGRADATION extension containing the previous
11	polynomial-based coefficients so as to maintain backwards compatibility, alongside an ALGOID=1 keyword so CAL task
12	computes inverse of exponential model if =1 and polynomial correction function if absent. These changes were first
13	implemented on 2023-09-15. Furthermore, this CCF contains another new extension (BORECORRFACTORS) that provides relative
14	correction factors, for each filter, for extra degradation at the pn boresight. These factors, which apply only to sources
15	observed at the pn boresight, are in tabulated form. The extension also contains the defined boreight region
16
17	Version 0.8 - 2020-05-08 (SR)
18	-----------
19	+ Updating DEGRADATION table coefficients with new ones derived from
20	observations of sources in the OM Catalogue SUSS4
21	A quadratic fit will be used.
22
23	Version 0.7 - 2018-04-04 (AT,EV)
24	-----------
25	+ Updating DEGRADATION table coefficients with new ones derived from
26	observations of sources in the OM Catalogue SUSS3
27	A quadratic fit will be used.
28
29	Version 0.6 - 2016-04-14 (AT)
30	-----------
31	+ Updating DEGRADATION table coefficients with new ones derived from
32	observations of sources in the OM Catalogue SUSS2.1
33	A quadratic fit will be used.
34
35	Version 0.5 - 2011-05-10 (AT)
36	-----------
37	+ Replacing DEGRADATION table coefficients with new ones derived from
38	all observations of BPM16274, Hz2 and GD153
39
40
41	Version 0.4 - 2005-03-07 (BC)
42	+ Added DEGRADATION table (derived from BPM16274 observations)
43
44	Version 0.3 - 2000-02-12 (UL)
45	-----------
46	+ added COINCIDENCE table (driving empirical coincidence loss correction)
47
48	Version 0.2 - 2000-02-10
49	-----------
50	+ calhb 0.4
51
52	Version 0.1 - 1999-09-17
53	-----------
54	+ in CVS.