ACIS Instrument Support - Monthly Progress Report for November 2004

1.  ACIS Characterization

1.1 Characterize and model radiation damage in ACIS CCDs

  ...  Continuing test of our CTI/background relation by running a series 
of alternating exposure mode observations with a grid of exposure times.  
The final planned observation was completed in November.  Analysis is ongoing.

  ...  One new charge injection test.  These data can be used to
study charge loss at energies not present in the calibration source.

  ...  Continued taking a series of data in full-frame raw mode for
performance verification and monitoring.  Two ObsIDs this month with
data in both the ACIS-S and -I configurations.

1.3 Monitor scientific on-orbit performance of ACIS

  ...  Continued monitoring of ACIS CTI, gain, trailing pixel pulseheight,
detector efficiency and spectral line centroid and width.  Updated 
monitoring web pages.
(linked from http://space.mit.edu/~cgrant/monitor.html)

 [...] Prepared ACIS status summary for Chandra Quarterly Review

1.5 Analyze data from engineering unit ACIS CCDs

  ...  Continued comparison of non-flight ACIS BI CCD to non-flight XIS-2 
BI CCD to help understand flight cross-calibration data as they become
available after launch.  May also help in better analyzing data from
flight BI CCDs.


2.  Engineering

2.1 Instrument hardware engineering performance

  ...  Continue to monitor long term ACIS instrument performance.  The ACIS 
instrument continues to function nominally.

2.3 Instrument science performance

  ...  Continued daily quick-look processing of ACIS telemetry and 
maintained Web interface to ACIS real-time data.

  ...  Continued to publish the "annotated DOT" timeline reports.

  ...  Participated in ACIS telecon on the possible ACIS bakeout. 


3.  CXC Support

3.1 Provide user support

  ...  Updated ACIS memo listing calibration ObsIDs and observation
characteristics (ACIS Memo #165).

3.2 Provide data analysis support

  ...  Participated in CXC Cal/Ops RMF discussion group.

  ...  Continued to maintain ACIS calibration database of ground and 
flight data products.

 [...] Supported CXC-initiated meeting to discuss pileup modeling.  Will
provide code for MIT CCD model for possible incorporation into MARX or
similar.


4.  OCC Support

4.1 Use of MIT/ACIS EGSE at OCC

  ...  Continued support and maintenance of ACIS EGSE software and 
hardware at the OCC.

  ...  Continued work on improving configuration management of the ACIS
workstations in the TST area of the Chandra OCC.

  ...  Continued planning for move of the ACIS EGSE setup to a new location 
at the OCC.  Supported ACIS Operations team meeting to discuss plans.
"Cloned" versions of current MIT/ACIS EGSE machines are being prepared
for future installation in the new location.  Creating verification 
procedures for comparing the output of the cloned machines to the originals.

Outreach:

None


all recent memos available at http://space.mit.edu/ACIS/iacis.html