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Operations CXO Status Report

Friday 28 May 2010 9.00am EDT

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

Chandra passed through the sixth, seventh and eighth eclipses of the 2010 summer season on May 22, 25, and 27 respectively, with nominal power and thermal performance.

Real-time procedures were executed on May 21-22 to dump OBC-A memory as a follow-up to the momentum unload cut-off patch. The dump will be used to update the baseline memory image maintained on the ground. A real-time procedure was executed on May 27 to update the on-board ephemeris.

A Chandra image release was issued on May 24 of the supernova remnant N49 in the Large Magellenic Cloud, a satellite galaxy of the Milky Way. X-ray data from Chandra reveals the presence of a bullet-shaped object. This bullet, which is traveling at 5 million miles per hour, is evidence that the supernova explosion was highly asymmetric. For details see:

A second Chandra image release was issued on May 25 of the Andromeda Galaxy, otherwise known as M31. Combined Chandra X-ray Observatory images of a small region in the center of M31 show differences between before and after January 2006. Before 2006, three X-ray sources are clearly visible in the Chandra image, including one faint source close to the center of the image. After 2006, a fourth source, called M31*, appears just below and to the right of the central source, produced by material falling onto the supermassive black hole in M31. For details see:

The schedule of targets for the next week is shown below and includes a TOO observation of XTE J1752-223 that is coordinated with the VLA, a TOO observation of GRB 091127, and a DDT TOO observation of XTE J1810-197.

0FGLJ1018.2-5858 ACIS-I May 30 NGC1340 ACIS-S MRC0116+111 ACIS-S ESO362-G18 ACIS-S May 31 TOO_XTEJ1752-223 ACIS-S RCW103 ACIS-I SNR0049-73.6 ACIS-S Jun 1 Radiation Belts Jun 2 ChandraDeepField-S ACIS-I GRB091127 ACIS-S Jun 3 RXJ033340.22-391833. ACIS-S Jun 4 Markarian231 ACIS-S PGC1216386 ACIS-S NGC5691 ACIS-S Radiation Belts ChandraDeepField-S ACIS-I Jun 5 HD148937 ACIS-S/HETG ChandraDeepField-S ACIS-I Jun 6 XTEJ1810-197 ACIS-S Jun 7


All spacecraft subsystems continued to support nominal operations.

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