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Operations CXO Status Report

Friday 27 September 2013 9.00am EDT

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

A real-time procedure was used to monitor the momentum unload that was executed from the on-board command loads on Sep 24; the unload performance was nominal.

A Chandra press release was issued on Sep 24 as a NASA press release describing observations of M60-UCD1, a type of “ultra-compact dwarf galaxy”. M60-UCD1 may be the densest galaxy in the nearby Universe; this galaxy weighs more than 200 million suns, over half of which is concentrated within a radius of just 80 light years. The density of stars in that region is 15,000 times greater than found in Earth's neighborhood in the Milky Way. For details see:

A Chandra image release was issued on Sep 26 describing observations of the Neutron star IGR J18245-2452. IGR J18245 displays behaviors of both a "low-mass X-ray binary" and a "millisecond pulsar". X-ray and radio observations were used to supply evidence for this never-before-seen transition between these two states. For details see:

The schedule of targets for the next week is shown below and includes and observation of GRB130831A, which was accepted as a Director's Discretionary Time TOO on Sep 9, an observation of M15, which was accepted as a Target of Opportunity on Sep 13, and an observation of Sgr A coordinated with the EVLA and XMM.

HESSJ1809-193 ACIS-I Sep 29 Radiation Belts Sep 30 G337.09-25.97 ACIS-I RXJ1856.5-3754 HRC-S/LETG Oct 1 Q2237+0305 ACIS-S HESSJ1809-193 ACIS-I 3C340 ACIS-S Oct 2 PGC3091110 ACIS-S Radiation Belts Oct 3 GRB130831A ACIS-S G121.11+57.01 ACIS-I 1RXSJ180431.1-27393 ACIS-I hrc-1 HRC-I hrc-2 HRC-I Oct 4 A2597 ACIS-I SgrA ACIS-S 3C337 ACIS-S Oct 5 SDSS1004+4112 ACIS-S Radiation Belts DeepField09 ACIS-I Oct 6 SN2008gm ACIS-S M15 HRC-S Oct 7


All spacecraft subsystems continued to support nominal operations.

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