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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.

------------------------------------------
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

------------------------------------------

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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