Status Report
From: Harvard-Smithsonian Center for Astrophysics
Posted: Friday, August 2, 2002
During the last week, Chandra completed the observing schedule as
planned.
A real-time procedure was completed nominally on Jul 30 to uplink an
update to the on-board gyro scale-factor and alignment matrix to
OBC-B. This matches the OBC-B values to those in OBC-A, which had been
updated on Jul 16. A real-time procedure was completed successfully
during the perigee passage on Aug 2 to check the bright earth limb
limitation with the aspect camera. Initial assessment of the results
from the earth limb check shows consistency with prior measurements
made in November 2001 and June 2002. The camera remains locked on
stars to within ~4-5 degrees of the bright earth (this compares with
the 20 degree current limitation). Further measurements are planned
before a constraint change can be considered.
A Chandra press release was issued on July 31 describing Chandra
observations that discovered part of an intergalactic web of hot gas
and dark matter that contains most of the material in the
universe. For more details, images, and animations, see:
http://chandra.harvard.edu/press/02_releases/press_073102.html
The observing schedule for next week is shown below and includes a
Director's discretionary time observation of V4641SGR and a target of
opportunity observation of GX 1+4 coordinated with RXTE.
------------------------------------------
V4641SGR ACIS-S Aug 4
SDSS173744+582829 ACIS-S Aug 5
3C371.0 ACIS-S
AX J1406.1+2233 ACIS-S
GX 1+4 ACIS-S/HETG
RXJ1856.5-3754 HRC-I Aug 6
VELA PWN ACIS-S
Radiation Belts
URANUS ACIS-S Aug 7
IM PEG ACIS-S/HETG
ABELL 426 ACIS-S Aug 8
ARLAC HRC-S Aug 9
Radiation Belts
ARLAC HRC-S Aug 10
ABELL 426 ACIS-S Aug 10
------------------------------------------
All spacecraft subsystems continued to operate nominally.
// end //
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