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Operations CXO Status Report

Monday 15 May 2000 7.30am EDT

During the last week, the daily load was re-built to continue operations without use of the HETG to allow time for proper testing of B-side grating operations. A real-time procedure was run at 5.30pm on 5/14 to verify the operation of both the HETG and LETG using the B-side equipment (MCE-B). Both gratings were inserted and retracted using both hardware commands and software commands (the latter as used from the daily load). All tests were successful and is was agreed that normal operations using the B-side could begin this week.

The observation schedule from May 6 through the coming week is given below together with annotations describing the HETG anomaly and recovery to B-side operation.

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XTE J1550-564 ACIS-S/HETG May 6 HETG retracted: no switch trip Radiation Belts SN 1993J ACIS-S May 7 M82 ACIS-I Proxima Centauri ACIS-S/HETG HETG failed insert Abell 1995 ACIS-S May 8 XTE J1550-564 ACIS-S/HETG observation made w/o HETG Proxima Centauri ACIS-S/HETG observation made w/o HETG Radiation Belts May 9 ZW 3146 ACIS-I start of rebuilt load NGC 6543 ACIS-S May 10 RX J2247+0337 ACIS-I May 11 Radiation Belts 0509-67.5 ACIS-S May 12 NGC 4736 ACIS-S A2199 ACIS-S May 13 MS 2053.7-0449 ACIS-I Radiation Belts May 14 1708-408 ACIS-S NGC 6752 ACIS-S May 15 Q0059-2735 ACIS-S 1E 0035.4-7230 ACIS-S Abell 3128 ACIS-I Rho Oph A ACIS-I Radiation Belts May 16 RX J0439.8-6809 ACIS-S May 17 NGC 5128 ACIS-I EX HYA ACIS-S/HETG May 18 HETG on B-side BAL 1312+2319 ACIS-S MS 1455.0+2232 ACIS-I May 19 NGC 4374 (M84) ACIS-S CAS A ACIS-I Radiation Belts BAL 1556+3517 ACIS-S May 20 NGC 4244 ACIS-S Cygnus A ACIS-S CAS A ACIS-S May 21 4U 0142+61 ACIS-S Cygnus Loop SW ACIS-I

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All spacecraft subsystems continued to operate nominally.

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