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Operations CXO Status Report

Friday 25 October 2002 7.00am EDT

During the last week the observing schedule was replanned to include an observation of the Bl Lac object Mkn 421 that was accepted as a 3 day turn-around Target Of Opportunity (TOO) on 23 October. The TOO was triggered when the object was detected in a high X-ray state by the ASM of RXTE. The schedule was replanned to include the 96ks observation with ACIS-S/LETG and the impacted observations of MACS-J2214.9-1359, MACS-J2129.4-0741, G21.5-0.9 and MACSJ2228.5+2036 will rescheduled in a later load.

Of note last week was the conduct of the final tests on 22 October to demonstrate star acquisition at 10 degrees from the bright Earth limb (the current limitation is 20 degrees). The tests were run from the daily load, and the results indicate nominal performance of the aspect camera.

The Chandra cycle 5 Education and Public outreach proposal peer review was held at SAO on 23 October. Reviews for prior cycles have been organized from HQ.

A Chandra press release was issued on 23 October that describes observations that challenge an alternative theory of gravity that eliminates the need for dark matter. For details see: http://chandra.harvard.edu/press/02_releases/press_102202.html.

The observing schedule for next week is shown below.

------------------------------------------
Radiation Belts                      Oct 27
NGC 2264                ACIS-I       Oct 28
SNR N157B               ACIS-S       Oct 29
A907                    ACIS-I
Radiation Belts                      Oct 30
MACS-J0647.7+7015       ACIS-I       Oct 31
Mrk 663 (2 obs)         ACIS-S
NGC5471B                ACIS-S
AX J1545.2+4855         ACIS-S
SDSS221644+001348       ACIS-S
A168                    ACIS-I
NGC6868                 ACIS-I       Nov 1  
2209+080                ACIS-S
A2589                   ACIS-S
Radiation Belts                      Nov 2
Sgr 1900+14             ACIS-S/HETG
Her X-1                 ACIS-S/HETG  Nov 3  
MACSJ1720.2+3536        ACIS-I
MACSJ1731.6+2252        ACIS-I

------------------------------------------

All spacecraft subsystems continued to operate nominally.

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