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Operations CXO Status Report

Friday 15 February 2013 9.00am EST

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

Real-time procedures were executed on Feb 12 and 14 to monitor thruster performance during scheduled angular momentum unloads. The enhanced monitoring is in response to a recent downward trend in the specific impulse on MUPS thruster A1. This trend remains under investigation to determine whether it is simply an indication of normal thruster degradation, unanticipated behavior in an elevated thermal environment, or an early warning flag of a more serious condition.

A Chandra press release was issued on Feb 13 as a NASA press release describing observations of W49B, a highly distorted supernova remnant, produced by a rare type of explosion. There is evidence that W49B left behind a black hole - not a neutron star like most other supernovas. If confirmed, W49B would be the most recent black hole formed in our Galaxy. For details see: http://chandra.si.edu/press/13_releases/press_021313.html

The schedule of targets for the next week is shown below and includes an observation of GRB 121027A, which was accepted as a Target of Opportunity on 2012 Dec 7, and an observation of MAXI J0556-332, which is a follow-up to a Target of Opportunity accepted on 2012 May 8.

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SS433 ACIS-S Feb 18 PSRJ1731-1847 ACIS-I Feb 19 SDSSJ1134+0010 ACIS-S Abell1033 ACIS-I SDSSJ1321+4817 ACIS-S PSRJ1741-2054 ACIS-S Radiation Belts Feb 20 MAXIJ0556-332 ACIS-S CepX-4 ACIS-S Feb 21 Abell1033 ACIS-I 3C175 ACIS-S GRB121027A ACIS-S Terzan5 ACIS-S Feb 22 Radiation Belts Terzan5 ACIS-S Feb 23 XBo135 HRC-I Feb 24 IC0862 ACIS-S

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All spacecraft subsystems continued to support nominal operations.

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