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Operations CXO Status Report

Friday 4 September 2015 9.00am EDT

During the last week the observing schedule was replanned to incorporate an observation of GRB150831A, which was accepted as a Target of Opportunity on Sep 1. Loads for the replanned schedule were uplinked on Sep 2. A portion of a scheduled observation of Cygnus A - E Hotspot was impacted by the replan and will be rescheduled in a future week.

A real-time procedure was executed on Sep 1 to confirm the operational capabilities of the updates to the CTU-A EEPROM that were uplinked on Aug 19. A second real-time procedure was executed on Sep 1 for an annual check-out of A-side MUPS thrusters, which are selected for use when Chandra is in its safe-mode configuration. Thrusters A3 and A4, on the cold side of the spacecraft, were fired and performed nominally. Thruster A1 was not fired due to the expected limited life remaining on it. Thruster A2 was tested nominally on May 26 during the transition to the Mixed-MUPS configuration and was not re-checked.

A real-time procedure was executed on Sep 2 to perform a routine self-check of the Electrical Interface Assembly (EIA) Sequencer.

The schedule of targets for the next two weeks is shown below and includes an observation of SNhunt275, a follow-up of a Director's Discretionary Time Target of Opportunity that was approved on May 26.



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Radiation Belts Sep 6 UDS ACIS-I Sep 7 PSRJ0821-4300 ACIS-S UDS ACIS-I Sep 8 CygnusA-EHotspot ACIS-I RMJ211849.1+003337. ACIS-I Sep 9 Radiation Belts ESO3060170Offset ACIS-I UDS ACIS-I 2FGLJ0858.3-4333 ACIS-I Sep 10 UDS ACIS-I NGC7457 ACIS-S Sep 11 Radiation Belts PSRJ2055+2539nebul ACIS-S Sep 12 UDS ACIS-I Sep 13 CygnusA-EHotspot ACIS-I Sep 14 Radiation Belts UDS (2 obs) ACIS-I Sep 15 4U2129+47 ACIS-S Sep 16 NGC7457 ACIS-S Radiation Belts Sep 17 SN1987A ACIS-S/HETG UDS (2 obs) ACIS-I Sep 18 Radiation Belts Sep 19 CygnusA-EHotspot ACIS-I Sep 20 SNhunt275 ACIS-S CentaurusA ACIS-I Sep 21

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All spacecraft subsystems continued to support nominal operations.

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