Summary release note for pipeline version 02000033/20010426.174813

Pipeline version 02000033/20010426.174813 was released on 27/Apr/01. It is a 
modification of the previous pipeline (02000032_20010212.141403, released 
12/Feb/01).

This new pipeline is the first one to use a new version of the SAS (ie 
SAS 5.0.3 [aka xmmsas_20010424_1139] as opposed to SAS 5.0 in previous 
pipelines), and so the SAS changes are also briefly described here. As always, 
this new pipeline will use the public CCF.

General - HTML summary output made more consistent, observation summary now 
created at start of pipeline. FITS catalogue products now have standard header 
keywords added. Attitude data now used to make GTIs (<3'). Many SAS bug fixes 
and tasks made more robust. 
EPIC - mos cross-node event reconstruction added. pn badpixfind parameters 
changed & algorithm improved for confused regions, events on offset columns 
now excluded, out_of_FOV flag added. (These changes should lead to much 
cleaner pn images, although out-of-time events are not yet removed.) Attitude 
time resolution for exposure maps decreased from 60 to 2 secs, maps have 
better DSS interpretation, and spectral correction removed. (This last change 
makes a significant difference to the low energy band exposure values.) EPIC 
pn small window images no longer used for source detection. Source detection 
background maps have correct chi sqd and DOF, and use intensity Dependant 
source cutout radius; source lists have correct hardness ratios and fluxes.
RGS - Attitude GTIs added, rgsregions replaces rgsregion & rgsbackreg.
OM - Flat field no longer a product, OSW images (detector coords) and combined 
source list now are products. Background handling improved in source detection
and assignment of magnitudes, sky image boundaries corrected. Problems remain 
in accurate assignment of magnitudes to detected sources.