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Operations CXO Status Report

Friday 21 December 2001 9.00am EST

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

A realtime procedure was completed on 17 Dec to swap from SSR-B to SSR-A. SSR-A had become full following a series of missed DSN passes caused by technical problems at the sites. Recording automatically switched to SSR-B to avoid data loss. All the data from both recorders were recovered at the next and subsequent passes however, thus maintaining the mission record of no data loss due to over-filled recorders.

A Chandra press release was issued on 19 Dec describing the "aftermath of a titanic explosion" in the elliptical galaxy NGC 4636. For further details and images showing the 25,000 light year symmetric arcs resulting from the explosion, see: http://chandra.harvard.edu/press/01_releases/press_121901.html.

The mission planning team completed work on the 2-week schedule to span the holiday period. The schedule of observations is shown below and includes a series of grating observations of Comet Linear, and an observation of Alpha Tauri coordinated with the Hubble Space Telescope.

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Q1245-197 ACIS-S Dec 23 PSS0957+3308 ACIS-S CHVC125 ACIS-S A2294 ACIS-I Dec 24 Cygnus Loop NE2 ACIS-S Radiation Belts Dec 25 Beta Ceti HRC-S/LETG G78.2+2.1 ACIS-I Dec 26 CYG X-1 ACIS-S/HETG Dec 27 A168 ACIS-I Radiation Belts HD 37022 ACIS-S/HETG Dec 28 Alpha Tauri HRC-I SDSS020651+121624 ACIS-S Dec 29 Vela PWN ACIS-S NGC 4038/NGC 4039 ACIS-S Radiation Belts Dec 30 Comet Linear (4 obs) ACIS-S/LETG Dec 31 PSS0134+3307 ACIS-S NGC 4051 HRC-S/LETG HZ43 (3 obs) HRC-S/LETG Jan 1 Radiation Belts Jan 2 VW CEP HRC-S/LETG TXS 0145+386 ACIS-I Jan 3 Radiation Belts Jan 4 A168 ACIS-I Jan 5 1E1207.4-5209 ACIS-S 1RXSJ161411.3-630657 ACIS-I Jan 6 HD123445 ACIS-I Q1328+254 ACIS-S PSS 1539+4312 ACIS-S RX J1605+3249 ACIS-I

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All spacecraft subsystems continued to operate nominally.

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

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