HUBBLE SPACE TELESCOPE

       DAILY REPORT #3063

PERIOD COVERED:  0000Z (UTC) 02/22/02 - 0000Z (UTC) 02/25/02

Daily Status Report as of 056/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 Completed Six Sets of STIS/CCD 8901 (Dark Monitor-Part 1)

        The Space Telescope Imaging Spectrograph (CCD) was used to monitor 
the darks.  There was no anomalous activity.

    1.2 Completed Seventeen Sets of WF/PC-2 8941 (Cycle 10 UV Earthflats)

        The WF/PC-2 was used to monitor flat field stability by obtaining 
sequences of earth streak flats to improve the quality of pipeline flat 
fields for the WFPC2 UV filter set.  The proposal had no problems.

    1.3 Completed Seven Sets of STIS/CCD 9088 (Next Generation Spectral 
Library of Stars)

        The Space Telescope Imaging Spectrograph (CCD) was used to produce 
a "Next Generation'' Spectral Library of 600 stars for use in modeling the 
integrated light of galaxies and clusters by using the low dispersion UV 
and optical gratings of STIS.  The library will be roughly equally divided 
among four metallicities, very low {Fe/H < -1.5}, low {-1.5 < Fe/H < -0.5}, 
near-solar {-0.5 < Fe/H < 0.1}, and super-solar {Fe/H > 0.1}, well-sampling 
the entire HR-diagram in each bin.  Such a library will surpass all extant 
compilations and have lasting archival value, well into the Next Generation 
Space Telescope era.  As described in 2.1 and HSTAR 8507, the acquisition 
for the third iteration of this proposal defaulted to fine lock backup on 
one FGS only, possibly affection the observations in that iteration.  No 
other problems occurred.

    1.4 Completed Twenty Sets of WF/PC-2 9318 (POMS Test Proposal: WFII 
Parallel Archive Proposal Continuation)

        The WF/PC-2 was used to perform the generic target version of the 
WFPC2 Archival Pure Parallel program.  The program was used to take 
parallel images of random areas of the sky, following the recommendations 
of the Parallels Working Group.  As described in 2.1 and HSTAR 8507, the 
acquisition for the ninth iteration of this proposal defaulted to fine lock 
backup on one FGS only, possibly affection the observations in that 
iteration.  There were no other reported problems.

    1.5 Completed Nine Sets of WF/PC-2 8937 (Cycle 9 Supplemental Darks pt2/3)

        The WF/PC-2 was used obtain three dark frames every day to provide 
data for monitoring and characterizing the evolution of hot pixels.  No 
problems were encountered.

    1.6 Completed Three Sets of STIS/CCD 8903 (Bias Monitor - Part 1)

        The Space Telescope Imaging Spectrograph (CCD) was used to monitor 
the bias in the 1x1, 1x2, 2x1, and 2x2 bin settings at gain=1, and 1x1 at 
gain = 4 to build up high-S/N superbiases and track the evolution of hot 
columns.  There were no problems.

    1.7 Completed Six Sets of STIS/CCD 9317 (Pure Parallel Imaging Program: 
Cycle 10)

        The Space Telescope Imaging Spectrograph (CCD) was used to perform 
the default archival pure parallel program for STIS during cycle 10.  There 
were no reported problems.

    1.8 Completed WF/PC-2 9315 (Hubble Heritage Observations of Gomez's 
Hamburger {IRAS 18059-3211})

        The WF/PC-2 was used to observe Gomez Hamburger.  The proposal 
completed with no reported problems.

    1.9 Completed Two Sets of STIS/MA2 9573 (NUV-MAMA Daily Dark Monitor)

        The Space Telescope Imaging Spectrograph (MA2) was used to perform 
daily monitoring of the NUV MAMA detector dark noise in order to monitor 
the effects of thermal changes on the NUV dark rate.  No problems occurred.

    1.10 Completed Three Sets of STIS/CCD 9106 (The Biggest Black Holes)

        The Space Telescope Imaging Spectrograph (CCD) was used to perform 
searches for supermassive black holes in galaxy centers that have led to 
the discoveries that {1} most or all hot galaxies contain massive dark 
objects at their centers, presumably black holes; and {2} there is a tight 
correlation between the black-hole mass and the luminosity-weighted 
velocity dispersion of the hot component of the galaxy.  This remarkable 
relationship suggests a strong link between black-hole formation, AGN 
activity, and galaxy formation, and once it is understood this link should 
advance our understanding of all three processes.  There were no reported 
problems.

    1.11 Completed Two Sets of STIS/MA1 8920 (Cycle 10 MAMA Dark Measurements)

        The Space Telescope Imaging Spectrograph (MA1) was used to perform 
the routine monitoring of the MAMA detector dark noise, and is the primary 
means of checking on health of the MAMA detectors systems through frequent 
monitoring of the background count rate.  The proposal completed with no 
reported anomalous activity.

    1.12 Completed Two Sets of STIS/CCD 8907 (Spectroscopic Flats C10)

        The Space Telescope Imaging Spectrograph (CCD) was used to obtain 
CCD flats in the spectrographic mode.  As described in 2.1 and HSTAR 8507, 
the acquisition for the final iteration of this proposal defaulted to fine 
lock backup on one FGS only, possibly affection the observations in that 
iteration.  There were no other reported problems.

    1.13 Completed WF/PC-2 8933 (Decontaminations and Associated 
Observations Pt. 2/3)

        The WF/PC-2 was used for the monthly decons.  Also included were 
instrument monitors tied to decons: photometric stability check, focus 
monitor, pre- and post-decon internals {bias, intflats, kspots, & darks}, 
UV throughput check, VISFLAT sweep, and internal UV flat check.  There were 
no reported problems.

    1.14 Completed Four Sets of STIS/CCD/MA1 9184 (A Survey for Missing 
Baryons in Highly Ionized Intergalactic Gas at Low Redshift)

        The Space Telescope Imaging Spectrograph (CCD and MA1) was used to 
observe six additional low-z QSOs with the STIS FUV E140M echelle mode {7 
km s^-1 resolution}.  Combined with archival data, this will increase the 
sample redshift path by a factor of ~7 compared to the published 
data.  With the echelle data, we will {1} measure the number of O VI 
absorbers per unit redshift {dN/dz} and their minimum cosmological mass 
density with a limiting equivalent width of W_Lambda ~50 mAngstrom , {2} 
examine whether the O VI absorption arises in photoionized, collisionally 
ionized, or multiphase gas, and {3} study the dependence of the O VI system 
properties on environment.  In addition to testing this prediction 
regarding the location of the missing baryons, the data will have 
applications to many other topics such as low-z LyAlpha absorbers and the 
physical properties and abundances of gas in the Milky Way halo.  There was 
no reported anomalous behavior.

    1.15 Completed WF/PC-2/STIS/CCD 9174 (Using Optically Faint Radio 
Sources to Pinpoint Dusty Proto-Galaxies)

        The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) were 
used to observe a number of high redshift, dusty starburst galaxies that 
remain invisible in ground based observations in the Hubble Deep 
Field.  These galaxies appear as faint radio sources with bright 
submillimeter counterparts, demonstrating they are very dusty systems.  The 
luminosities of these galaxies suggest they are in the process of 
converting the bulk of their gas mass into stars, and will likely evolve 
into present day massive ellipticals.  The observations completed normally, 
with no reported problems.

    1.16 Completed WF/PC-2 9320 (Constraining the Highly Eccentric Orbit of 
the Companion of the Binary TNO 1998 WW31 by Observations at its Pericenter)

        The WF/PC-2 was used to observe the Trans Neptunian Object {TNO} 
1998 WW31 that has a satellite.  These observations will assess the 
ellipticity of the orbit in a definite way, providing an important 
constraint to the models proposed for the creation of such a binary 
system.  No problems were reported.

    1.17 Completed WF/PC-2/STIS/CCD 9274 (Cluster-Galaxy Interactions in 
the Coma Cluster)

        The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) was 
used to observe the vigorously star forming galaxy NGC 4911 that provides a 
spectacular example of a luminous spiral on its first passage through the 
hot intracluster medium of the Coma cluster.  ACIS-I imaging of NGC 4911 
and its environs will complement HST Cycle 8 WFPC2 imaging and reveal the 
role of the X-ray gas in driving star formation and generating tidal 
debris.  There were no problems.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions: 19
    Successful: 19

        As detailed in HSTAR 8507, the acquisition at 053/200648Z defaulted 
to fine lock backup on FGS-3 only when the scan step limit was exceeded on 
FGS-1.  The proposals described in 1.3, 1.4 and 1.12 may have been affected.
  Scheduled Re-acquisitions: 18
    Successful: 18

    2.2 FHST Updates:
    Scheduled: 45
    Successful: 45

    2.3 Operations Notes:

        A 486 RAM dump was performed at 053/1512Z per ROP DF-01A.

        The STIS MCE-1 reset at 053/1759520Z while outside any SAA interval 
and while the low voltage was on.  The STIS flight software error counter 
was cleared at 053/1805Z as directed by ROP NS-12.  MAMA-1 was recovered at 
054/0622Z via normal SMS commands at the time of the next high voltage on 
commanding.

        Using ROP SR-1A, the SSR EDAC error counter was cleared four 
times.  The same ROP was utilized at 053/1917Z to clear an SSR-1 command error.

        The CCS engineering status buffer limit for SESBSLD was changed to 
'8' at 053/2020Z, using ROP DF-18A.

        In preparation for Servicing Mission 3B, CCS 'B' string was 
configured for prime operations at 054/1405: CCS 'C' string was configured 
for operations backup at 054/1547Z.  The flight operations team is expected 
to move from the STScI to the GSFC STOCC at 056/1530Z (mid-Monday morning).

        The NSSC-1 status buffer was dumped and reset at 056/0723Z per ROP 
NS-3.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

         Servicing Mission 3B, currently scheduled for February 28.

        Continuation of normal science observations and calibrations.

/CAW