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             |              CCC  XX   XX    OOO           |
Chandra      |             CC     XX XX    OO OO          | CXC
Electronic   |            CC       XXX    OO   OO         | Number 43
Bulletin     |             CC     XX XX    OO OO          | October
             |              CCC  XX   XX    OOO           | 2005
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Welcome to the Chandra X-ray Center's Electronic News Bulletin Number 43.

CXC Web site: cxc.harvard.edu

If you would like to unsubscribe from this alias, simply reply to this message
to let us know.  

Please use this website to update your address or email: 
          http://cxc.harvard.edu/cdo/udb/userdat.html

Contents:

1. Important News on Chandra Observations:           
      Early Scheduling and New Default Target Offsets

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Item 1. Important News on Chandra Observations:                                              
      Early Scheduling and New Default Target Offsets                                
      ===============================================


If you have questions/concerns about either of these items,
please contact your assigned User Interface person with a
copy to cus@cfa.harvard.edu or the CXC Helpdesk.


*** EARLY SCHEDULING OF CYCLE 7 

Due to the increased constraints on scheduling observations on Chandra, 
we will be scheduling Cycle 7 targets to be observed along with Cycle 6 
effective imediately. We expect the completion of Cycle 6 targets to 
occur in February 2006. Please note that we are unable to provide 
funding for the early Cycle 7 observations until the Cost proposal 
review is completed in November.

For full details of the scheduling process see:

http://cxc.harvard.edu/cdo/observation_scheduling.html#AO7


*** NEW DEFAULT TARGET OFFSETS for ACIS-S

The CXC recommends a revised target pointing offset for ACIS-S
observations to place the target closest to the aimpoint while
avoiding a node boundary.  The default Y-offset value for ACIS-S
target is henceforth changed from -0.33 arcmin (-20 arcsec) 
to +0.17 arcmin (+10 arcsec).  The new recommended +0.17 arcmin 
Y-offset will be used for all approved ACIS-S targets that are 
unobserved as of Oct 9, 2005 and that either explicitly or by 
default had a Y-offset value of -0.33 arcmin in their proposals.  


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