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Operations CXO Status Report

Friday 21 December 2007 8.30am EST

During the last week the observing schedule was replanned to include an observation of m81-ot071213 with ACIS-S. The source was accepted as a fast turn-around Target Of Opportunity (TOO) on Dec 19 and loads were replanned and uplinked on Dec 20. The short (5 Ks) observation was accommodated in the schedule without significant impact to other observations.

A real-time procedure was conduced on Dec 14 to turn-on the ACIS DEA housekeeping telemetry. The action was a follow-up to the DPA-B turn-off on Dec 13.

Real-time procedures were conducted on Dec 18 to turn off the EPHIN detector G high voltage and set the detector G failure-mode to "on". A software patch was also loaded to modify the RadMon function to recognize the change. The detector G high voltage was turned off in order to ameliorate voltage drops in the detector C high voltage that have been seen as Chandra's operating temperatures have increased. The change will optimize EPHIN's performance given the present thermal environment and observed detector efficiencies.

The Chandra Cycle 10 Call for Proposals (CfP) was released on Dec 14 with a deadline for proposal submission of Mar 20, 2008.

A Chandra press release was issued as a NASA Science Update on Dec 17. The release described the jet from a black hole at the center of a galaxy striking the edge of another galaxy, the first time such an interaction has been found. For details see: http://chandra.harvard.edu/photo/2007/3c321/

The Mission Planning team worked hard to develop a 2 week schedule to cover the holiday period as shown below. The schedule includes observations of M31 and M87 coordinated with HST and of 2MASSJ0523382-140302 coordinated with the VLA.

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Radiation Belts Dec 23 SN1978K ACIS-S Dec 24 SN2007on ACIS-S A520_OFF3 ACIS-I GRB 060729 ACIS-S Dec 25 Radiation Belts Dec 26 SN2007on ACIS-S IGR J14471-6414 ACIS-I Dec 27 S08 ACIS-S Crab Pulsar HRC-S/LETG Dec 27 004042.10-110957.6 ACIS-S J0727.5-2406 ACIS-I OJ287 ACIS-S NGC2563-P9 ACIS-I Dec 28 SDSS J092913.96+37 ACIS-S SDSS J115944.82+01 ACIS-S GRB 060729 ACIS-S Radiation Belts M31 ACIS-I Dec 29 GRB 060729 ACIS-S SAX J1452.8-5949 ACIS-I 2MASS J0523382-140 ACIS-I Dec 29 SSA22 Protocluster ACIS-I Dec 30 3CRR 190 ACIS-S Dec 31 Palomar 2 ACIS-S 3C20 ACIS-S Radiation Belts 8P/Tuttle-2008 (7 obs) ACIS-S Jan 2 A520_OFF1 ACIS-I 8P/Tuttle-2008 (5 obs) ACIS-S Jan 3 SN 2001em ACIS-S SN 2005ip ACIS-S Jan 4 Radiation Belts SN 2005kd ACIS-S 8P/Tuttle-2008 (3 obs) ACIS-S SDSS J1626+2952 ACIS-S NGC 5824 ACIS-S Jan 5 J1531-5610 ACIS-I S01 ACIS-S NGC2563-P11 ACIS-I M87 ACIS-S GRB 060729 ACIS-S IGR J14331-6112 ACIS-I AX J194939+2631 ACIS-S Jan 6 1800+440 ACIS-S NGC2563-P11 ACIS-I SN 2006aj ACIS-S Radiation Belts 4C 74.26 Southern ACIS-S Jan 7

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All spacecraft subsystems continued to support nominal operations.

The next report is planned for Jan 4 following the holiday. A Happy Holiday and New Year to everyone from the Chandra Team!

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