Status Report

Hubble Space Telescope Daily Report #2848 11/13/00

By SpaceRef Editor
November 13, 2000
Filed under

PERIOD COVERED:  0000Z (UTC) 11/10/00 – 0000Z (UTC) 11/13/00
Daily Status Report as of 318/0000Z
    1.1 Completed Five 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.
    1.2 Completed Six 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.
    1.3 Completed STIS/CCD/MA1 8566 (High Resolution UV/X-Ray Spectroscopy of SMC X-1)
        The Space Telescope Imaging Spectrograph (CCD and MA1) was used to perform simultaneous observations of the X-ray pulsar SMC X-1 and its B0 companion SK160 with Chandra and ground-based optical telescopes.  The proposer will search for correlation between orbital phase and "bleaching” of important P Cygni lines by X-ray photoionization, and will model the simultaneous X-ray, ultraviolet, and optical continuum emission at different phases of the superorbital period to measure changes in mass accretion rate, disk structure, and disk size.  The proposal completed with no reported problems.
    1.4 Completed Two Sets of WF/PC-2 8893 (Decon Visits Associated with Nov 1 2000 WFPC2 Safing)
        The WF/PC-2 was used to perform decon and post-decon standard observations after WF/PC-2 is brought out of safemode { Entered safemode on Nov 1 2000.}
    1.5 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.
    1.6 Completed Three Sets of WF/PC-2/STIS/CCD 8641 (Testing the Accelerating Universe)
        The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) were used to observe Type Ia supernovae which provide evidence for an accelerating universe: an extraordinary result that needs to be rigorously tested.  The observations completed with no reported problems.
    1.7 Completed WF/PC-2 7506 (NGC 1705: a Benchmark for Galaxy Evolution)
        The WF/PC-2 was used to perform a case study of the star formation history and chemical evolution of NGC1705, an irregular galaxy with distance modulus ~28, whose stellar content cannot be resolved from ground.  For this galaxy there is direct observational evidence for the presence of a galactic wind, a phenomenon predicted by most chemical evolution models for this type of galaxy.  The proposal completed with no reported problems.
    1.8 Completed Ten Sets of STIS/CCD 8562 (Probing the Large Scale Structure: Cosmic Shear Observations)
        The Space Telescope Imaging Spectrograph (CCD) was used to probe the distortion of light bundles from distant galaxies, looking at the statistical properties of the intervening inhomogeneous {dark} matter distribution.  The proposal completed nominally.
    1.9 Completed STIS/CCD 8580 (Pre-Cassini/Huygens Studies of Titan’s Surface, Troposphere and Stratosphere)
        The Space Telescope Imaging Spectrograph (CCD) was used to observe Titan, Saturn’s largest satellite.  Titan has an opaque atmosphere in UV and visible wavelengths due to aerosols and methane gas.  This proposal performs a data-dense suite of observations to {a} map the
three-dimensional distribution of methane and aerosols in Titan’s troposphere and stratosphere with the possibility of detecting moving weather patterns, {b} provide a history of the distribution of haze in preparation for Cassini and Huygens observations, and {c} map Titan’s surface albedo with unprecendented spatial resolution and
signal/noise.  There were no reported problems.
    1.10 Completed Two Sets of 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.
    1.11 Completed WF/PC-2 8249 (A Strong Lensing Survey of the Mass Distribution in X-ray Luminous Clusters)
        The WF/PC-2 was used for a gravitational lensing survey of the central regions of 16 X-ray luminous clusters from a statistically complete sample.  The observations completed with no problems.
    1.12 Completed WF/PC-2/STIS/CCD 8559 (The Role of Dark Matter in Cluster Formation and Galaxy Evolution)
        The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) were used to observe the outer regions of massive clusters that represent transitional areas of great cosmological importance where field galaxies encounter the steep potential wells of dark matter and baryonic hot gas.  Little is known about either the dark matter profile at large radii or the morphological properties of infalling galaxies at those redshifts where strong evolution is observed in the cluster cores.  The proposal completed normally, with no reported problems.
    1.13 Completed STIS/CCD 8172 (STIS Deep DLA Imaging Survey II)
        The Space Telescope Imaging Spectrograph (CCD) was used to make deep observations of quasar/alpha galaxy PKS0201+11.  The HST imaging, together with ground-based spectroscopy, will unify absorption-line studies and faint galaxy imaging studies, providing a comprehensive picture of the history of assembly, star formation, gas consumption, and chemical enrichment in the Damped Lyman-Alpha galaxies.  The observations were executed as scheduled, and no anomalies were noted.
    1.14 Completed WF/PC-2 8805 (POMS Test Proposal: WFII Parallel Archive Proposal Continuation)
        The WF/PC-2 was used to perform a generic target version of the WFPC2 Archival Pure Parallel program.  The program will be used to take parallel images of random areas of the sky, following the recommendations of the Parallels Working Group.  The proposal completed with no reported problems.
    1.15 Completed WF/PC-2 8599 (A Census of Nuclear Star Clusters in Late-Type Spiral Galaxies)
        The WF/PC-2 was used to conduct an I-band snapshot survey of a well-defined sample of nearby, face-on spiral galaxies of type Scd or later.  The proposal completed nominally.
    2.1 Guide Star Acquisitions:
      Scheduled Acquisitions: 18
                Successful: 18
    Scheduled Re-acquisitions: 28
                Successful: 28
    2.2 FHST Updates:
                  Scheduled: 38
                Successful: 38
    2.3 Operations Notes:
        The flight operations team operated on CCS "B" string with Release 3.3 over the weekend.  There were no major problems.
        Using ROP SR-1A, the SSR EDAC error counter was cleared eight times.
        The engineering status buffer limits were adjusted at 315/1931Z per ROP DF-18A.
        Per HSTAR 7962, the main bus A voltage (CMNBUSAV) flagged out-of-limits high (with a value of 32.712 – limit is 32.71) for one telemetry at 316/142902Z.  The voltage had been increasing as the HST approached trickle change, which was achieved at 316/143024Z.
        SSA transmitter 1 was turned on at 316/2347Z and turned off at 317/0156Z, using ROP IC-2.
        A TTR was written for a loss of recoverable data at 317/0032Z due to a WSGT equipment configuration.
        As directed by ROP SR-8A, SSR engineering continuous record was commanded at 317/0156Z.  It was turned off at 317/0530Z.
        A TTR was created when a TDE problem at 317/0217Z caused a recoverable data loss.
        A TTR was written for a period of no GCMC capability beginning at 317/0340Z.
        SSA transmitter 2 was turned on at 317/0529Z and turned off at 317/0530Z, using ROP IC-2.
        There was no GCMR/ODM capability at 317/1655Z.  A TTR was written.
        Continuation of normal science observations and calibrations.

SpaceRef staff editor.