HUBBLE SPACE TELESCOPE

   DAILY REPORT #2564

PERIOD COVERED:  0000Z (UTC) 02/18/00 - 0000Z (UTC) 02/22/00

Daily Status Report as of 053/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 Completed Eight Sets of WF/PC-2 8460 (Cycle 8 Supplemental Darks pt2/3)

        The WF/PC-2 was used to obtain three dark frames every day to 
provide data for monitoring and characterizing the evolution of hot 
pixels.  The observations completed with no reported problems.

    1.2 Completed Four Sets of STIS/CCD 8439 (Bias Monitor-Part 2 C8)

        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.  The proposal completed with no reported problems.

    1.3 Completed Seven 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.

    1.4 Completed Two Sets of WF/PC-2 8223 (The Nature of RadioOptical 
Alignments in Faint Radio Sources)
          The WF/PC-2 was used to make observations of the faint radio 
galaxies QSO-0812+2 and QSO-0817+2 in order to study the nature of their 
radio/optical alignment.  The study of the host galaxies of high redshift 
AGN is important if we are to attempt to investigate the population of high 
redshift galaxies, which are not selected on the basis of luminous 
starburst activity.  The observations were completed as planned, and no 
problems were reported.

    1.5 Completed Thirteen Sets of STIS/CCD 8549 (POMS Test Proposal: 
Non-Scripted Parallel Proposal Continuation I)

        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.

    1.6 Completed Nine Sets of WF/PC-2 8445 (WF/PC-2 Cycle 8 Earth Flats)

        The WF/PC-2 was used to make Cycle 8 Earth flat calibration 
observations.  This is to obtain sequences of earth streak flats to 
construct high quality flat fields for the WF/PC-2 filter set.  The 
observations were executed as scheduled, and no anomalies were noted.

    1.7 Completed Seven Sets of STIS/CCD 8202 (Bright Quasar Close Lensing 
Search)

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
observations of HCLQ0341-2, HCLQ0157-1, HCLQ1225+2, HCLQ0423-2, HCLQ1233-2, 
HCLQ0821+3 and HCLQ0931+4 as part of a second generation survey to search 
for bright lensing quasars.  With the restored PSF, new images will be 
considerably more sensitive to the presence of both close separation and 
faint lens components, and because STIS reaches two magnitudes fainter the 
PC, the new snapshot images will have much greater dynamic range.  HSTAR 
7515 and 2.1 described a guide star acquisition failure which affected the 
fifth iteration of this proposal for which all observations were lost when 
the take data flag remained down.  Otherwise, the observations were 
executed as scheduled, and no further anomalies were noted.

    1.8 Completed Five Sets of WF/PC-2 8090 (POMS Test Proposal: WF-II 
Parallel Archive Proposal Continuation)

        The WF/PC-2 was used in the parallel mode to make some low galactic 
latitude archive observations.  The program will be used to take parallel 
images of random areas of the sky.  The observations were executed as 
scheduled, and no anomalies were noted.

    1.9 Completed Four Sets of WF/PC-2/STIS/MA1/MA2 7410 (Deep UV Imaging 
of the Hubble Deep Field)

        The WF/PC-2 and the Space Telescope Imaging Spectrograph (MA1 and 
MA2) were used to make ultraviolet observations of Hubble Deep Field 
HDF-STIS-P.  The observations will extend the searches for Lyman break 
galaxies to B~ 29, two magnitudes fainter than possible with the existing 
HDF data and more than four magnitudes fainter than the current limit of 
ground-based spectroscopy.  The observations were executed as scheduled, 
and no anomalies were reported.

    1.10 Completed WF/PC-2/STIS/CCD 7615 (Determination of the Mass 
Function of a Globular Cluster Through Gravitational Microlensing)

        The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD) were 
used to make gravitational microlensing observations of the large globular 
cluster NGC6656 in order to study its mass function.  Gravitational 
microlensing offers a unique and direct method of determining the masses of 
stars and other compact objects down to planetary masses.  A bias and dark 
calibration observations were also taken.  The observations were completed 
as planned, and no problems were reported.

    1.11 Completed WF/PC-2 8215 (New Clues to the Ejection Process in Young 
Stars: Forbidden Line Imaging of T-Tauri Micro-Jets

        The WF/PC-2 was used to observe classical T Tauri stars which offer 
a unique opportunity to progress on the problem of the fundamental role of 
bipolar outflows in star formation, as their optical forbidden line 
emission is allowed to trace collimated winds very close to the central 
star.  Determining the exact flow geometry and the line excitation 
mechanism is essential in order to obtain new clues to the mass-loss 
process in young stars.  The observations completed with no reported problems.

    1.12 Completed WF/PC-2 8194 (Evolution of High-Redshift Seyfert Galaxies)

        The WF/PC-2 was used to make observations of the high-redshifted 
Seyfert galaxy Gal-105225 in order to study its evolution.  The 
observations will provide insights into the Seyfert phenomenon at 
intermediate redshift and will complement similar HST studies of normal 
galaxies, clusters and quasars.  As detailed in 2.1 and HSTAR 7514, the 
acquisition for this proposal defaulted to fine lock on one FGS only, 
possibly affecting the observations in this proposal.  Otherwise, the 
observations were executed as scheduled, and no further anomalies were noted.

    1.13 Completed STIS/MA1 8428 (STIS FUV-MAMA Cycle 8 Flats)

        The Space Telescope Imaging Spectrograph (MA1) was used to make a 
series of far-ultraviolet calibration flats with the Kr lamp for the 
construction of on-orbit D-flats for select modes.  The calibration images 
were completed as planned, and no problems were reported.

    1.14 Completed WF/PC-2 8216 (T Tauri Star Snapshot Survey II. 
Completing the CTTs Sample)

        The WF/PC-2 was used to make observations of the T-Tauri class star 
known as IRAS04260 as part of Snapshot Survey II.  This database will be of 
fundamental importance to understanding the nature of planet-forming 
environments and their frequency in the galaxy.  The observations were 
executed as scheduled, and no anomalies were noted.

    1.15 Completed WF/PC-2 8307 (Morphology of High Radio Surface 
Brightness Planetary Nebulae)

        The WF/PC-2 was used to make observations of the high radio surface 
of the planetary nebula PK027+04D1.  The morphological transformation from 
the spherically symmetric circumstellar envelopes of AGB stars to the 
complex, bipolar structures of planetary nebulae has remained one of the 
major unresolved problems in the late stages of stellar evolution.  The 
observations were completed as planned, and no problems were reported.

    1.16 Completed STIS/CCD 8104 (Constraints on the Evolution of Powerful 
Radio Galaxies)

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
observations of 3C67.  Recent work has identified the GHz Peaked Spectrum 
and Compact Steep Spectrum radio sources as the most likely candidates for 
the progenitors of the large-scale powerful classical double sources.  Both 
a wavelength calibration image and a CCD flat calibration image were also 
taken.  The observations were completed as planned, and no anomalies were 
reported.

    1.17 Completed WF/PC-2/STIS/CCD/MA1 8169 (HST-Galileo Io Campaign)

        Both the WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD 
and MA1) were used to make observations of Jupiter's moon Io.  Io plays a 
central role in the Jovian system, yet the mechanisms that couple its 
volcanoes, the tenuous atmosphere, the escaping corona and the plasma torus 
remain elusive.  In 1999 there is the unique opportunity to combine HST 
observations with the Galileo close flybys of Io.  The observations were 
completed as planned, and no problems were reported.

    1.18 Completed WF/PC-2 8345 (Multipolar Bubbles and Jets in Very Low 
Excitation Planetary Nebulae - A WF/PC-2 H-Alpha Imaging Survey)

        The WF/PC-2 was used to make H-Alpha observations of the very low 
excitation planetary nebula PK043+03D1 in order to study its multipolar 
bubbles and jets.  Comparison of the morphology of this young PNe sample 
with more evolved PNe populations will set new constraints on models for 
the production of jet-like outflows and nebular evolution.  The 
observations were completed as planned, and no problems were reported.

    1.19 Completed STIS/CCD/MA2 8511 (Full-field Sensitivity and Geometry)

        The Space Telescope Imaging Telescope (CCD and MA2) was used to 
measure the geometric distortion for each STIS detector, using the same 
field as previously used for measuring the MAMA geometric distortion in 
cycle 7.  These exposures will also serve to measure the image location for 
each of the MAMA imaging modes, with respect to the CCD frame, In order to 
fix the detector coordinates for the STIS MAMA imaging modes with respect 
to the CCD coordinates, and hence to the FGS system.  The proposal 
completed nominally.

    1.20 Completed WF/PC-2 8436 (POMS Test Proposal: WFII Backup Parallel 
Archive Proposal II)

        The WF/PC-2 was used to make archive observations parallel to the 
prime science observations as part of a POMS test proposal.  This is a POMS 
test proposal designed to simulate scientific plans.  The observations were 
completed as planned, and no anomalies were reported.

    1.21 Completed STIS/CCD/MA2 8317 (Mass Accretion Rates for Pre-Main 
Sequence Intermediate Mass Stars)

        The Space Telescope Imaging Spectrograph (CCD and MA2) was used to 
obtain the first direct, accurate measurements of mass accretion rates for 
intermediate mass {1.5M{sun} to 3.5M{sun}} T Tauri stars}, precursors of 
the Beta Pic- type stars.  The observations completed nominally.

    1.22 Completed STIS/CCD 8228 (The Black Hole Versus Bulge Mass 
Relationship in Spiral Galaxies)

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
observations of the galaxy NGC-4030 in order to study the black hole versus 
bulge mass relationship in spiral galaxies.  A wavelength calibration image 
was also taken.  The observations were executed as scheduled, and no 
anomalies were noted.

    1.23 Completed WF/PC-2 8209 (The Complex Circumstellar Environment of 
the Massive Contact Binary RY Scuti)

        The WF/PC-2 was used to observe RY Scuti, a very massive and 
luminous evolved contact binary system surrounded by an unusual nebula that 
is only a few arcseconds in extent.  The observations completed nominally.

    1.24 Completed Four Sets of WF/PC-2 8442 (WF/PC-2 Cycle 8 Standard Darks)

        The WF/PC-2 was used to make a series of Cycle 8 standard dark 
calibration observations.  This dark calibration program obtains dark 
frames every week in order to provide data for the ongoing calibration of 
the CCD dark current rate, and to monitor and characterize the evolution of 
hot pixels.  The observations were executed as scheduled, and no anomalies 
were noted.

    1.25 Completed S/C 5582 (FOC/48 Monthly Activation (Camera Section 
Only): Cycle 4)

         This proposal was executed as scheduled, and no anomalies were noted.

    1.26 Completed STIS/MA1/MA2 8144 (UV Spectroscopic Snapshots of FUSE 
AGN Targets)

        The Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) was 
used to make far ultraviolet spectrographic snapshot observations of the 
FUSE AGN target HS1103+641.  This object is currently scheduled to be 
observed by the Far Ultraviolet Spectroscopic Explorer {FUSE}.  The 
observations were executed as scheduled, and no anomalies were noted.

    1.27 Completed FOC/96 7923 (FOC F/96 Turn-on)

        The Faint Object Camera (f/96) was used to take an internal flat 
and a dark to ensure that the 30-day limit for the FOC is not 
exceeded.  The observations were executed as scheduled, and no anomalies 
were noted.

    1.28 Completed STIS/CCD/MA1 8302 (Lyman-alpha emission in Starburst 
Galaxies)

        The Space Telescope Imaging Spectrograph (CCD and MA1) was used to 
perform a deep study of Ly-alpha emission and destruction in 3 star-forming 
galaxies.  These objects have been already observed with the GHRS and 
exhibit a variety of situations, with Ly-alpha showing P Cyg profiles, 
secondary emissions or even a deep damped absorption line with no 
emission.  They also span a range of intrinsic properties: IZW18 is a 
gas-rich, metal deficient dust free dwarf galaxy, Haro 2 has a simple 
morphology while IRAS 08339+6517 is a luminous IRAS starburst galaxy with 
more dust and complex Ly- alpha profile.  The proposal completed with no 
reported problems.

    1.29 Completed STIS/MA1 8426 (Cycle 8 MAMA Dark Measurements)

        The Space Telescope Imaging Spectrograph (MA1) was used to make a 
routine Cycle-8 MAMA dark noise calibration measurement.  This proposal 
will provide the primary means of checking on the health of the MAMA 
detectors.  This is done through frequent monitoring of the background 
count rate.  The observations were completed as planned, and no problems 
were reported.

    1.30 Completed STIS/CCD/MA1 8273 (The Oxygen Abundance in Translucent 
Interstellar Clouds)

        The Space Telescope Imaging Telescope (CCD and MA1) was used to 
obtain high-resolution STIS echelle observations of the interstellar O I 
Lambda1356 absorption toward a sample of stars behind six translucent 
clouds characterized by large H I column densities and high 
extinctions.  Previous GHRS measurements of this weak feature in diffuse 
clouds have shown no evidence of density-dependent O depletion from the gas 
phase and indicate a total {gas + dust} interstellar O abundance that is 
about 2/3 of the solar value.  The observations were completed nominally.

    1.31 Completed Two Sets of WF/PC-2 8230 (Snapshot Survey of Dynamically 
Close Galaxy Pairs from z=0.1 to z=0.5)

        The WF/PC-2 was used to make snapshot survey observations of 
galactic cluster Gal-Clus-0.  This is to obtain snapshot images of a large, 
well-defined, and dynamically selected sample of close galaxy pairs at 
moderate redshift.  The observations were executed as scheduled, and no 
anomalies were noted.

    1.32 Completed WF/PC-2 8354 (DIRECT Distances to M31 and M33 Using 
Detached Eclipsing Binaries and Cepheids)

        The WF/PC-2 was used to observe two important galaxies in the 
cosmological distance ladder, M31 and M33, to identify the variable stars 
we have already discovered from the ground.  The new variables come from 
our project, called DIRECT, aiming to obtain the distances to M31 and M33 
using detached eclipsing binaries and Cepheids.  Combining photometry and 
spectroscopy for a selected subsample of binaries and Cepheids allows us to 
derive direct distance of high accuracy, which rely on no intermediate 
steps.  The observations completed with no anomalous activity.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions: 33
Successful: 31
  Scheduled Re-acquisitions: 21
Successful: 16

        Per HSTAR 7514, the acquisition at 050/205430Z failed to fine lock 
backup on FGS-3 only.  The proposal described in 1.12 may have been affected.

        The acquisition at 051/212123Z failed when the scan step limit was 
exceeded on FGS-1.  HSTAR 7515 was written.  The proposal defined in 1.7 
was affected.

        The acquisition at 053/001303Z failed when the search radius limit 
was exceeded on FGS-3.  The following five re-acquisitions also 
failed.  HSTAR 7521 was written.  Five proposals (WF/PC-2 8460, WF/PC-2 
8242, STIS 8549, STIS 8439, and STIS 8437), occurring during the period of 
the next report, were affected.

    2.2 FHST Updates:
Scheduled: 63
Successful: 63

    2.3 Operations Notes:

        Servicing Mission Observatory Verification (SMOV) continues.

        When CCS string "A" crashed at 049/2334Z following two re-cycles, 
CCS string "G" was utilized for operations beginning at 050/0028Z.  That 
string was re-cycled at 050/0241Z.  String "A" was configured for a line 
outage recorder playback from 050/1045Z until 050/1206Z.  CCS string "A" 
was returned as the operational string at 050/1206Z, although a re-cycle 
was performed between 050/2100Z and 050/2130Z when the file server was 
reported down.

        Per ROP SR-1A, the correctable SSR EDAC errors were cleared five times.

        The BMIC test was enabled at 049/1321Z.

        There was a STIS EMC re-try at 051/093924Z.  Per ROP NS-12, the 
STIS flight software error counter was reset at 051/0955Z.

        The NSSC-1 status buffer was dumped at 051/0955Z per ROP NS-3.

        The AER was re-configured at 052/0046Z to avoid a potential data 
loss during the SMS transition.

        STIS MCE-2 reset at 053/092502Z while the low voltage was on and 
while in an SAA interval.  ROP NS-12 was used to reset the STIS flight 
software error counter.  MAMA-2 will be recovered at 053/1748Z, the time of 
the next SMS-commanded high voltage on event.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of SMOV and normal science observations and calibrations.

/CAW