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Operations CXO Status Report

Friday 31 March 2017 9.00am EDT

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

Real-time procedures were executed on Mar 27 in preparation for a 20-minute-long, penumbral Lunar eclipse on Mar 28: one to dump and clear the EPS glitch counters, one to activate SCS 29, and one to set the short eclipse flag to 'true'. Chandra passed through the eclipse with nominal power and thermal performance. Real-time procedures were executed following the eclipse on Mar 28 to disable SCS 29, to set the short eclipse flag to 'false', and to dump and clear the EPS glitch counters.

A Chandra press release was issued on Mar 30 describing observations of an X-ray transient located in the Chandra Deep Field-South. The source was seen to brighten by at least a factor of a thousand in a few hours. Possible explanations include a gamma ray burst seen in an unusual way or a medium-sized black hole shredding a white dwarf star. For details see: http://chandra.harvard.edu/press/17_releases/press_033017.html

The schedule of targets for the next week is shown below and includes an observation of HD80404 coordinated with HST, and observations of SgrA* coordinated with the Event Horizon Telescope.



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Radiation Belts Off-field2 ACIS-I Apr 3 PROCYON HRC-I W0615-5716 ACIS-S TWA33 ACIS-S A1795 ACIS-I HZ43 HRC-S /LETG Apr 4 J1207-3900 ACIS-S IGRJ17315-3221 ACIS-I Radiation Belts Apr 5 SDSSJ125415.55+48085 ACIS-S betaLeo HRC-I A1795 ACIS-I SgrA* ACIS-S Apr 6 WD1145+017 ACIS-S NGC4450 ACIS-S J1111-2655 ACIS-S SgrA* ACIS-S Apr 7 W2210-3507 ACIS-S 2MASSJ20125995+0112 ACIS-S Radiation Belts Apr 8 Abell1795outskirts ACIS-I A1795 ACIS-I CygnusA-WHotspot ACIS-I A1795 ACIS-I Apr 9

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All spacecraft subsystems continued to support nominal operations.

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