Hubble Space Telescope Daily Report #2673 07/27/00
HUBBLE SPACE TELESCOPE
DAILY REPORT #2673
PERIOD COVERED: 0000Z (UTC) 07/26/00 – 0000Z (UTC) 07/27/00
Daily Status Report as of 209/0000Z
1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:
1.1 Completed Two Sets of WF/PC-2 8826 (Cycle 9 Supplemental Darks pt 1)
The WF/PC-2 was used to perform a T dark calibration program that obtains three dark frames every day in order to provide data for monitoring and characterizing the evolution of hot pixels. There were no reported anomalies.
1.2 Completed WF/PC-2 8645 (A Survey of Mid-UV Morphology of Nearby Galaxies: Galaxy Structure and Faint Galaxy)
The WF/PC-2 was used to investigate the relation between star formation and the global physical characteristics of galaxies to interpret the morphologies of distant galaxies in terms of their evolutionary status. The observations completed nominally.
1.3 Completed Two Sets of STIS/CCD 8808 (POMS Test Proposal: STIS Non-Scripted Parallel Proposal Continuation III)
The Space Telescope Imaging Spectrograph (CCD) was used to make non-scripted, parallel observations as part of a POMS test proposal. The observations completed with no anomalous activity.
1.4 Completed STIS/CCD 8631 (Bright Quasar Close Lensing Search II)
The Space Telescope Imaging Spectrograph (CCD) was used to expand the Cycle 8 second generation HST snapshot survey of bright quasars, optimized to find lenses with component image separations < 1". The observations completed nominally.
1.5 Completed Two Sets of STIS/CCD 8439 (Bias Monitor-Part 2 C8)
The Space Telescope Imaging Spectrograph (CCD) was used to monitor the bias in the 1×1, 1×2, 2×1, and 2×2 bin settings at gain=1, and 1×1 at gain = 4, to build up high-S/N superbiases and track the evolution of hot columns. The proposal completed with no reported problems.
1.6 Completed Three Sets of STIS/CCD 8437 (Dark Monitor-Part 2 C8)
The Space Telescope Imaging Spectrograph (CCD) was used to monitor the darks. The proposal completed nominally.
1.7 Completed Two Sets of WF/PC-2 8699 (The Origin of Short-Period Comets)
The WF/PC-2 was used to detect and characterize cometary nuclei in order to determine the basic physical properties of a large fraction of the population of short-period comets. By acquiring statistically significant data, we can study the origin of this family of comets and test the hypothesis that they are collisional fragments from the Kuiper Belt Objects. The observations completed with no reported problems.
1.8 Completed WF/PC-2 8676 (Halo Microlens Source Systems and their Backgrounds and Reddening)
The WF/PC-2 was used to investigate the existence of dark objects in the Galactic halo suggested by the MACHO project while is about to release 5.7 years of LMC data revealing ~ 20 candidate microlensing events. The observer proposes to obtain medium-deep broadband images of eight of the new candidate source stars. The observations completed with no reported anomalies.
1.9 Completed STIS/CCD 7912 (STIS Parallel Archive Proposal – Nearby Galaxies – Imaging and Spectroscopy)
The Space Telescope Imaging Spectrograph (CCD) was used to make parallel observations of nearby galaxies. This survey will be useful to study the star formation histories, chemical evolution, and distances to these galaxies. These data will be placed immediately into the Hubble Data Archive. The observations were completed as scheduled, and no problems were reported.
1.10 Completed STIS/CCD 8870 (POMS Test Proposal: STIS Non-Scripted Parallel Proposal Continuation IV)
The Space Telescope Imaging Spectrograph (CCD) was used to make non-scripted, parallel observations as part of a POMS test proposal. The observations completed with no anomalous activity.
2.0 FLIGHT OPERATIONS SUMMARY:
2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 11
Successful: 10
Per HSTAR 7746, the acquisition at 209/021017Z failed when the scan step limit was exceeded on FGS-3. Three proposals, all occurring during the period of the next report were affected: STIS 8700, WF/PC-2 8826, and STIS 8437.
Scheduled Re-acquisitions: 8
Successful: 8
2.2 FHST Updates:
Scheduled: 18
Successful: 18
2.3 Operations Notes:
The SSR EDAC error counter was cleared three times, using ROP SR-1A.
The battery 4 pressure limit flagged out-of-limits low (with a value of 918.778) for one telemetry sample at the end of orbit
night. HSTAR 7747 was written.
As directed by ROP NS-12, the STIS flight software error counter was rest at 209/0255Z, after the acquisition failure detailed in 2.1.
SI C&DH errors were reset at 209/033447Z, per ROP NS-5.
3.0 SIGNIFICANT FORTHCOMING EVENTS:
Continuation of normal science observations and calibrations.
