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Operations CXO Status Report

Friday 13 January 2012 9.00am EST

During the last week Chandra completed the observing schedule as planned.

A real-time procedure was executed on Jan 9 to gradually raise the HRC-S MCP HV levels during an observation. This procedure was used collect data for use in a determination of updated HV levels that will recover some quantum efficiency loss caused by a drop in detector gain. The HV levels were restored to their nominal values at the conclusion of the observation.

A Chandra press release was issued on Jan 10 describing the discovery, using Chandra and the NSF-funded Atacama Cosmology Telescope (ACT), of a galaxy cluster, ACT-CL J0102-4915. Nicknamed "El Gordo", it is the most massive, the hottest, and gives off more X-rays than any known cluster at its distance or beyond. El Gordo is actually the site of two galaxy clusters colliding, making it a younger cousin to the well-known Bullet Cluster. For details see:

The schedule of targets for the next week is shown below and includes observations of SN 2011ay and 4U 1630-47, which were accepted as Targets of Opportunity on Dec 29 and Jan 4 respectively.

Radiation Belts                     Jan 15
         SN2011ay               ACIS-S
         M37                    ACIS-I
         M31BHXN                ACIS-I       Jan 16
         E0102-72S2             ACIS-S       Jan 17
         4U1630-47              ACIS-S/HETG
         HD143761               ACIS-S
         1542+390               ACIS-S
         UGC6446                ACIS-S
         Radiation Belts                     Jan 18
         NGC3794                ACIS-S
         PSRJ1038+0032          ACIS-S
         NGC3115                ACIS-S
         Radiation Belts                     Jan 20
         4U1630-47              ACIS-S/HETG
         NGC3115                ACIS-S       Jan 21


All spacecraft subsystems continued to support nominal operations.

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