Daily Rpt #4718 (Corrected)

HUBBLE SPACE TELESCOPE - Continuing to collect World Class Science

DAILY REPORT*** #4718 (Corrected)

PERIOD COVERED: 5am October 16 - 5am October 17, 2008 (DOY
290/0900z-291/0900z)

OBSERVATIONS SCHEDULED


FGS 11212

Filling the Period Gap for Massive Binaries

The current census of binaries among the massive O-type stars is
seriously incomplete for systems in the period range from years to
millennia because the radial velocity variations are too small and the
angular separations too close for easy detection. Here we propose to
discover binaries in this observational gap through a Faint Guidance
Sensor SNAP survey of relatively bright targets listed in the Galactic
O Star Catalog. Our primary goal is to determine the binary frequency
among those in the cluster/association, field, and runaway groups. The
results will help us assess the role of binaries in massive star
formation and in the processes that lead to the ejection of massive
stars from their natal clusters. The program will also lead to the
identification of new, close binaries that will be targets of long
term spectroscopic and high angular resolution observations to
determine their masses and distances. The results will also be
important for the interpretation of the spectra of suspected and newly
identified binary and multiple systems.

FLIGHT OPERATIONS SUMMARY:

Significant Spacecraft Anomalies: (The following are preliminary
reports of potential non-nominal performance that will be
investigated.)

HSTARS:

11539 - ACS Suspended During SBC Transition

ACS suspended with status buffer messages ACS 715, parameter 166, and
ACS 707, parameter 0, both occurring at time 61165 corresponding to a
time of 17:40:16.625z. Solar Blind Camera turn on was scheduled 10sec
later.

11540 - NSSC-1 safed.

Upon acquisition of signal at 290/21:17:11 the NSSC-1 had safed. Two
486 ESB messages "D24" (SICDH_TOGGLE_TEST_FAIL)and
"D01"(SAFE_HLD_MACROS_ACTIVE_INFO) were received at 290/21:14:29.
SCDHSAFA (Safing Macro Active), SDSTOGF (Toggle Failure Counter),
SSICDHT (SIC&DH Toggle OK Flag), and SSIPTBE (PIT Toggle Test) flags
were set.

COMPLETED OPS REQUEST:

18329-0 - NSSC-1 Pointer for Science SMS Intercept @ 290/1406z
18332-3 - Dump ACS Memory @ 290/1939z
18333-1 - NSSC-1 HW Memory Dump @ 290/2213z

COMPLETED OPS NOTES:

NS-20 - WFPC-II Decontamination Limits Management @290/1746z

************************* SCHEDULED***** SUCCESSFUL
FGS GSacq*************** 06************* 06
FGS REacq*************** 01************* 01
OBAD with Maneuver* **** 14************* 14

SIGNIFICANT EVENTS:

Flash Report :

HST Status as of Thursday evening 291/00:00: At 290/17:40:16 UTC, ACS
suspended due to the Solar Blind Camera MAMA low voltage power supply
apparently not coming up properly. At 290/21:14 the NSSC-1 halted. The
halting resulted in the HST486 SIC&DH PIT Toggle test failing twenty
seconds later safing the payload with the execution of SMAC20.