HUBBLE SPACE TELESCOPE

       DAILY REPORT #3004

PERIOD COVERED:  0000Z (UTC) 11/23/01 - 0000Z (UTC) 11/26/01

Daily Status Report as of 330/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 Completed Seven Sets of WF/PC-2 8936 (Cycle 10 Supplemental Darks 
Pt1/3)

        The WF/PC-2 was used to perform a dark calibration program that 
obtains three dark frames every day to provide data for monitoring and 
characterizing the evolution of hot pixels.  The proposal completed with no 
reported problems.

    1.2 Completed STIS/CCD 9148 (Light Echos and the Nature of Type Ia 
Supernovae)

        The Space Telescope Imaging Spectrograph (CCD) was used to take 
STIS snapshot images of a subset of 43 well observed Type Ia supernovae 
{SNIa}, most of which have been discovered in late type galaxies over the 
last 40 years to make a systematic search for light echos around SN 
Ia.  STIS will also observe a sample of 10 SN II and SN Ib/c, which are 
believed to be the result of massive star core collapse and, therefore, to 
be thin-disk population objects, in order to make an empirical calibration 
of the accuracy of our method for determining scale heights.  The SN Ia 
sample will provide a direct as well as accurate estimate of the scale 
height of SN Ia which is an important clue to the progenitors of these 
events.  The proposal completed nominally.

    1.3 Completed STIS/MA2 8920 (Cycle 10 MAMA Dark Measurements)

        The Space Telescope Imaging Spectrograph (MA2) 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.

    1.4 Completed FGS/1 9089 (Parallaxes of Cataclysmic Variables: 
Understanding Their Peculiar Secondary Stars)

        Fine Guidance Sensor #1 was used to measure precise parallaxes for 
three additional CVs {WZ Sge, RU Peg, and YZ Cnc}, whose orbital periods 
span a much larger range than explored in previous observations, allowing 
examination of how the accretion luminosity and secondary star change with 
orbital period.  There were no problems.

    1.5 Completed Ten Sets of WF/PC-2 9244 (POMS Test Proposal: WFII 
Parallel Archive Proposal Continuation)

        The WF/PC-2 was used to perform a generic target version of the 
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 observations completed with no anomalous 
activity.

    1.6 Completed Nine Sets of STIS/CCD 9285 (POMS Test Proposal: STIS 
Non-scripted Parallel Proposal Continuation III)

        The Space Telescope Imaging Spectrograph (CCD) was used to make low 
galactic latitude, non-scripted parallel observations as part of a POMS 
test proposal.  The observations were completed as planned, and no 
anomalies were reported.

    1.7 Completed Two Sets of STIS/CCD 9128 (A Snapshot Survey of 
Absorption Lines from High Velocity Clouds in the Milky Way)

        The Space Telescope Imaging Spectrograph (CCD) was used to search 
for Mg II and Mg I absorption from Galactic High Velocity Clouds {HVCs} 
along the sightlines of 51 of the brightest QSOs, BL Lacs and Seyfert 2 
galaxies in the sky.  The observations completed with no reported problems.

    1.8 Completed Three Sets of STIS/CCD/MA2 8471 (D/H In Quasar Absorption 
Line Systems)

        The Space Telescope Imaging Spectrograph (CCD and MA2) was used to 
record the high Lyman series lines of two damped Lymand-alpha systems in 
the coverage of the near-UV band, where the interference from randomly 
situated Lyman-alpha forest lines is much lower than at visible 
wavelengths.  A secondary objective of this program is to observe various 
atomic lines shortward of Lyman-alpha in these systems {such as absorption 
from the O VI doublet arising from very hot gas}, and to register 
absorption features from the Lyman and Werner bands of molecular hydrogen 
if the molecular abundances are high enough to make them detectable.  The 
proposal completed with no reported problems.

    1.9 Completed WF/PC-2 9249 (POMS Test Proposal: WFII Backup Parallel 
Archive Proposal II)

        The WF/PC-2 was used to execute a POMS test proposal designed to 
simulate scientific plans.  The proposal completed with no reported problems.

    1.10 Completed WF/PC-2 9103 (Resolving New Examples of Edge-on Young 
Stellar Object Disks)

        The WF/PC-2 was used to perform edge-on, optically thick 
circumstellar disks observations have been previously imaged by the Hubble 
Space Telescope in association with several nearby young stars.  In these 
systems, the central star is occulted from direct view, large PSF artifacts 
are absent, and the disk reflected light is clearly seen.  It is for these 
objects in nearby star-forming regions that HST has provided the best, 
highest resolution {7-10 AU} views to date of disks which may form 
planetary systems like our own.  Comparison of edge-on disk images with 
scattered light models has allowed key structural parameters such as the 
disk outer radius, vertical scale height, radial density profile, total 
mass, and dust grain properties to be determined.  No problems were reported.

    1.11 Completed STIS/CCD 9164 (Helical Flows and Rotation in 
Protostellar Jets)

        The Space Telescope Imaging Spectrograph (CCD) was used to study 
the velocity structure of protostellar jets transverse to the jet flow 
axis.  HST resolution would allow the search for rotation, e.g. a helical 
flow pattern, around the axis of an optical jet.  Such a detection would 
provide strong evidence that jets act as outflowing channels for angular 
momentum, thus allowing infalling material to fully accrete onto the 
protostar.  There were no problems.

    1.12 Completed Five Sets of WF/PC-2 8942 (Cycle 10 Intflat Sweeps and 
Linearity Test)

        The WF/PC-2 was used to monitor the pixel-to-pixel flatfield 
response and provide a linearity check.  These intflat sequences are done 
once during the year and the images will provide a backup database in the 
event of complete failure of the visflat lamp as well as allow monitoring 
of the gain ratios.  There were no reported problems.

    1.13 Completed Four 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

    1.14 Completed WF/PC-2 9091 (Evolution of Star Forming Environments in 
H II Regions)

        The WF/PC-2 was used to look for evaporating gaseous globules and 
silhouette disks in two young clusters and along one molecular cloud 
wall.  The proposal completed nominally.

    1.15 Completed Two 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.

    1.16 Completed Two Sets of STIS/CCD 9066 (Closing in on the Hydrogen 
Reionization Edge of the Universe)

        The Space Telescope Imaging Spectrograph (CCD) was used in parallel 
constrain the Hydrogen reionization edge in emission that marks the 
transition from a neutral to a fully ionized IGM at a predicted 
redshifts.  The proposal completed uneventfully.

    1.17 Completed STIS/CCD 9178 (NGC 2610: A Benchmark for Photoionization 
Physics)

        The Space Telescope Imaging Spectrograph (CCD) was used to perform 
observations with a wide slit to observe lines of H I, He II, C III, C IV, 
N IV, N V, O III, O IV, Ne III, Ne IV, and Ne V from 1240Angstrom to 
6563Angstrom.  He II Lambda1640/Lambda4686 will determine the {small} 
reddening accurately.  These observations will provide a benchmark against 
which it can test the understanding of high T_e nebulae, which are 
ubiquitous in low abundance environments, but which have proved difficult 
to model.  No problems were encountered.

    1.18 Completed Two Sets of WF/PC-2 8867 (Gamma-Ray Bursts: Discovering 
The Progenitors And Understanding The Explosion - Visits A0-R0)

        The WF/PC-2 was used to observe a gamma-ray burster, 
GRB010921.  Gamma-ray burst astronomy, one of the most active and exciting 
frontiers in astrophysics, is now entering a critical stage -- with 
dramatic leaps in understanding of these events, as well as new 
discoveries.  Improvements in triggering and positioning accuracy provided 
by the SAX and HETE-2 gamma-ray satellites will allow entirely new classes 
of events to be studied.  Given the recent progress in this field, the 
proposers are now in a position to design precision, broadband measurements 
that can provide quantitative information on the as-yet unknown energy 
sources, the explosion geometry, and the surrounding medium.  In 
particular, the growing evidence of an intimate connection between SNe and 
GRBs can be definitively tested.  The proposal completed with no reported 
problems.

    1.19 Completed STIS/CCD 9312 (POMS Test Proposal: STIS Non-scripted 
Parallel Proposal Continuation IV)

        The Space Telescope Imaging Spectrograph (CCD) was used to make low 
galactic latitude, non-scripted parallel observations as part of a POMS 
test proposal.  The observations were completed as planned, and no 
anomalies were reported.

    1.20 Completed 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.  No problems occurred.

    1.21 Completed WF/PC-2/STIS/CCD 7514 (Observations of Orion -- Probing 
the Origin of Abundance Anomalies in H II Regions)

        The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) were 
used to perform a set of observations of emission-line diagnostics of the 
Orion Nebula, the brightest and best-resolved H II region.  The major goal 
is to provide reliable elemental abundances in this benchmark of the 
ISM.  The observations completed with no reported anomalous activity.

    1.22 Completed STIS/CCD 9131 (Imaging the Host Galaxies of High 
Redshift Type Ia Supernovae)

        The Space Telescope Imaging Spectrograph (CCD) was used to complete 
the snapshot survey of distant galaxies of known redshift which hosted 
supernovae {SNe} of Type Ia found via the Supernova Cosmology Project 
{SCP}.  No problems were seen.

    1.23 Completed FGS/1 9034 (The Masses and Luminosities of Population II 
Stars)

        Fine Guidance Sensor #1 was used to observe the mass-luminosity 
relation {MLR} of Population II stars of which very little is currently 
known.  With the advent of the Hipparcos Catalogue, improved distances to 
many spectroscopic binaries known to be Pop II systems are now 
available.  After surveying the literature and making reasonable estimates 
of the secondary masses, we find 13 systems whose minimum separation should 
be larger than the resolution limit of FGS #1.  The observations completed 
nominally.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions: 20
Successful: 20

  Scheduled Re-acquisitions: 27
Successful: 27

    2.2 FHST Updates:
Scheduled: 40
Successful: 40

    2.3 Operations Notes:

        Using ROP SR-1A, the SSR EDAC error counter was cleared six times.

        The STIS MCE-1 reset at 327/132923Z while the low voltage was on 
and while outside any SAA Boundary.  The STIS flight software error counter 
was reset at 327/1344Z per ROP NS-2.  MAMA-1 was recovered via normal SMS 
commanding at 330/0608Z.

        A TTR was written for a mode change problem that occurred at 
328/213517Z.  The problems resulted in a loss of 32k engineering data for 
the interval 328/213517Z to 328/220734Z.

        Another TTR was generated for a generic command dropout at 330/080557Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of normal science observations and calibrations.

/CAW