Hubble Space Telescope Daily Report #2721 10/04/00
HUBBLE SPACE TELESCOPE
DAILY REPORT #2721
PERIOD COVERED: 0000Z (UTC) 10/03/00 – 0000Z (UTC) 10/04/00
Daily Status Report as of 278/0000Z
1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:
1.1 Completed STIS/CCD/MA1/MA2 8280 (Origins, Structure and Evolution of Magnetic Activity in the Cool Half of the H-R Diagram: A STIS Survey)
The Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) was used to make observations of star HD39587 to carry out part of a major ultraviolet spectral survey of "coronal" late-type stars. A wavelength calibration image was also taken. The observations were executed as scheduled, and no anomalies were noted.
1.2 Completed Two Sets of STIS/CCD 8837 (CCD Dark Monitor-Part 1)
The Space Telescope Imaging Spectrograph (CCD) was used to monitor the darks. The proposal completed with no reported problems.
1.3 Completed STIS/CCD 8838 (Bias Monitor – Part 1)
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 nominally.
1.4 Completed STIS/CCD 8663 (Survey of SMC Planetary Nebulae: Nebular and Stellar Evolution in a Low- Metallicity Environment)
The Space Telescope Imaging Spectrograph (CCD) was used to survey of SMC planetary nebulae {PNe} in order to study the co-evolution of the nebulae and their central stars, in an environment that is chemically very metal poor. We will obtain STIS imaging and medium-resolution slitless spectroscopy that will yield line fluxes and nebular morphologies in important emission lines, plus magnitudes of the central stars. From these data we will gather a harvest of information: the nebular size, morphology, ionization structure, density, and mass; and the central star temperature, luminosity, and mass. The proposal completed with no reported anomalies.
1.5 Completed STIS/CCD/MA2 8569 (A New Survey for Low-Redshift Damped Lyman-Alpha Lines in QSO MgII Systems)
The Space Telescope Imaging Spectrograph (CCD and MA2) was used to support studies which have shown that most of the observable neutral gas mass in the Universe resides in QSO damped LyAlpha {DLA} systems. However, at low redshift , DLA can only be found by searching in the UV with HST. By boot-strapping from the MgII statistics, we will be able to further improve the determination of the low- redshift statistical properties of DLA {their incidence and cosmological mass density} and open up new opportunities for studies at low redshift. The observations completed nominally.
1.6 Completed STIS/CCD/MA2 8141 (Abundances and Physical Conditions in the ISM of the Magellanic Clouds)
The Space Telescope Imaging Spectrograph (CCD and MA1) was used to obtain high-resolution UV spectra of one star, SK155, in the SMC, as part of a detailed study of the interstellar medium in and toward the Magellanic Clouds — nearby systems of low metallicity and low dust-to-gas ratio for which stellar abundance data are also available. The proposal completed with no reported problems.
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The following scheduled WF/PC-2 proposals were not executed since the instrument was placed in safe at approximately 276/114752Z.
WF/PC-2 8826 (Cycle 9 Supplemental Darks pt 1)
WF/PC-2 8805 (POMS Test Proposal: WFII Parallel Archive Proposal Continuation) WF/PC-2 8822 (Decontaminations and Associated Observations Pt. 1/4)
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The following scheduled joint WF/PC/STIS/CCD proposals only partially executed since WF/PC-2 has been in safe from approximately 276/114752Z.
Two Sets of WF/PC-2/STIS/CCD 8573 (Newborn Planets and Brown Dwarf Companions in IC 348)
2.0 FLIGHT OPERATIONS SUMMARY:
2.1 Guide Star Acquisitions:
Scheduled Acquisitions: 7
Successful: 7
Scheduled Re-acquisitions: 10
Successful: 10
2.2 FHST Updates:
Scheduled: 14
Successful: 14
2.3 Operations Notes:
The operations team continues to perform its duties from the Science Institute MOR (SIMOR). Early this morning, at 278/051000Z, the PC used to command experienced a failure. At the time no commanding was being uplinked. This occurrence was documented in HSTAR 7885.
WF/PC-2 remains in safe. Current plans are to uplink a new intercept command load between 279/0841Z and 279/1148Z, to begin recovery of the instrument at approximately 279/1800Z, and to perform a WF/PC-2 decon between 280/0700Z and 280/2000Z. The first WF/PC-2 shutter usage is then scheduled at 280/2300Z.
The SSR EDAC error counter was cleared twice, per ROP SR-1A.
Using ROP NS-3, the NSSC-1 status buffer was dumped four times.
3.0 SIGNIFICANT FORTHCOMING EVENTS:
Recovery of WF/PC-2.
Continuation of normal science observations and calibrations.
