HUBBLE SPACE TELESCOPE

   DAILY REPORT #2559

PERIOD COVERED:  0000Z (UTC) 02/11/00 - 0000Z (UTC) 02/14/00

Daily Status Report as of 045/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 Complete WF/PC-2 8331 (Probing the Dark Side of Galaxy Formation: 
HST Imaging of the ISO Ultradeep Survey)

        The WF/PC-2 was used to observe the Hubble Deep Field (HDF) which 
gave astronomers an unprecedented view of the optical and rest--frame--UV 
side of galaxy formation.  However,
new data from ISO and COBE confirms the suspicion that the optical/UV does 
not tell the whole story.  ISO observations have also demonstrated that 
this is true even in the HDF.  These show the presence of ~25 galaxies 
brighter than ~200MuJy at 15Mum.  The observations were completed with no 
reported anomalies.

    1.2 Completed Three 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 Four 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 Seven 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.

    1.5 Completed Four 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.

    1.6 Completed Two Sets of 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 galaxies NGC-3310 and NGC-3953 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.

    1.7 Completed Five Sets of WF/PC-2 8457 (UV Earth Flats)

        The WF/PC-2 was used to obtain a series of Ultraviolet Earth 
flats.  The observations were completed with no reported problems.

    1.8 Completed Two Sets of WF/PC-2 8338 (The Evolution of the Host 
Galaxies of Powerful Radio Sources)

        The WF/PC-2 was used to make observations of the host galaxies of 
the powerful radio sources known as MRC0114-21 and MRC0541-24.  A combined 
data set of radio galaxies and quasars will allow powerful tests of the 
relationship between radio galaxies and quasars and the evolution of the 
host galaxies of powerful radio sources over a wide range of look-back 
times.  The observations were executed as scheduled, and no anomalies were 
noted.

    1.9 Completed WF/PC-2 8269 (The Morphological Evolution of Field Galaxies)

        The WF/PC-2 was used to make observations of the near-infrared 
field galaxy LYNX-C in order to study its morphology.  The observations 
were completed as planned, and no anomalies were reported.

    1.10 Completed Two Sets of WF/PC-2 8199 (Local Cosmology: The Nearby 
Flow Field and its Structure)

        The WF/PC-2 was used to make observations of the galaxy UGC03698 in 
order to study its nearby flow field and structure.  Very little data are 
available to constrain the velocity field of galaxies in the local 
neighborhood {<= 500 km/sec}.  The observations were executed as scheduled, 
and no anomalies were noted.

    1.11 Completed WF/PC-2 8450 (WF/PC-2 Cycle-8 Noiseless Preflash Test)

        The WF/PC-2 was used to make observations of the large globular 
cluster Omega-Cen, as part of a Cycle-8 noiseless preflash test.  This 
program will test whether a noiseless preflash can reduce CTE and long vs. 
short effects.  An internal flat and a dark calibration image were also 
taken.  The observations were completed as planned, and no anomalies were 
reported.

    1.12 Completed Three Sets of STIS/CCD 8410 (STIS CCD Hot Pixel 
Annealing C8)

        The Space Telescope Imaging Spectrograph (CCD) was used to assess 
the effectiveness of the CCD hot pixel annealing process by measuring the 
dark current behavior before and after annealing and by searching for any 
window contamination effects.  In addition CTE performance is examined by 
looking for traps in a low signal level flat.  The observations were 
completed as planned, and no anomalies were reported.

    1.13 Completed Two Sets of WF/PC-2 8301 (A Snapshot Survey of X-ray 
Selected Central Cluster Galaxies)

        The WF/PC-2 was used to make snapshot survey observations of the 
x-ray, central cluster galaxies A1204 and RXJ0281.0.  Central cluster 
galaxies are the most massive stellar systems known and have been used as 
standard candles for many decades.  The observations were executed as 
scheduled, and no anomalies were noted.

    1.14 Completed WF/PC-2 8390 (Expansion Parallax Distances to Planetary 
Nebulae)

        The WF/PC-2 was used to make observations of the planetary nebula 
NGC5979 in order to study its parallax distance.  The largest impediment to 
our understanding of planetary nebulae is the lack of reliable 
distances.  The observations were executed as scheduled, and no anomalies 
were noted.

    1.15 Completed 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 galaxy 
GSO-1758+6 in order to study the nature of its 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.

    1.16 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.

    1.17 Completed STIS/CCD 8226 (Discerning the Origins of Blue 
Stragglers: Masses and Rotation Rates)

        The Space Telescope Imaging Spectrograph (CCD) was used to study 
the blue stragglers in globular cluster NGC-5272-BS.  Conventional wisdom 
holds that the masses of Blue Straggler Stars in globular clusters are 
significantly larger than the turnoff mass.  A wavelength calibration 
observation was also taken.  The observations were executed as scheduled, 
and no anomalies were noted.

    1.18 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.

    1.19 Completed STIS/CCD/MA1 8279 (Cataclysmic Variable Disk Winds: A 
High Time and Spectral Resolution Study of  Flow Inhomogeneity)

        The Space Telescope Imaging Spectrograph (CCD and MA1) was used to 
observe disks and disk winds which are found in many astrophysical 
settings.  The proposal completed nominally.

    1.20 Completed WF/PC-2 8233 (UV Imaging of Optical Jets: A New Window 
on the Physics of Jets)

        The WF/PC-2 was used to observe extragalactic radio jets which are 
highly collimated beams of high energy particles and magnetic fields 
issuing forth at relativistic speeds from sub-parsec scale regions, 
extending hundreds of kpc through interstellar and intergalactic 
space.  They are unique in their scope, power, and size. The jets affect 
their host galaxies and environments, through kinetic energy output and 
through deposition of cosmic rays and magnetic fields into interstellar and 
intergalactic space.  Despite years of study, fundamental jet parameters 
such as the magnetic field strength, particle density, jet configuration, 
bulk Lorentz factor, and the nature of particle acceleration in the flow 
remain unknown.  The observations completed with no anomalous activity.

    1.21 Completed Three 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.

    1.22 Completed STIS/CCD 8202 (Bright Quasar Close Lensing Search)

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
observations of HCLQ0248-4 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.  The 
observations were executed as scheduled, and no anomalies were noted.

    1.23 Completed WF/PC-02 8131 (HST Imaging of Moderate Redshift X-ray 
Emitting Groups of Galaxies)

        The WF/PC-2 was used to make observations of the infrared and x-ray 
emitting galactic cluster Gal-Clus-0.  Most galaxies in the universe, 
including our own Milky Way, are members of poor groups of 
galaxies.  Recent optical and X- ray observations of nearby groups have 
revealed considerable new insight into these important systems.  The 
observations were completed as scheduled, and no problems were reported.

    1.24 Completed WF/PC-2 8193 (Comparing the Hosts of High-Z Radio-Quiet 
Quasars to Lyman Break Galaxies)

        The WF/PC-2 was used to try to determine the underlying causes of 
the rapid cosmological evolution of the quasar population that is a mystery 
around which is woven many different strands of contemporary 
cosmology.  The proposal completed nominally.

    1.25 Completed STIS/CCD/MA1/MA2 8317 (Mass Accretion Rates for Pre-Main 
Sequence Intermediate Mass Stars)

        The Space Telescope Imaging Spectrograph (CCD, MA1 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.

    1.26 Completed STIS/MA2 8429 (Cycle 8 Plate Scale Verification)

        The Space Telescope Imaging Spectrograph (MA2) was used to conduct 
a Cycle-8 plate scale calibration verification. The calibration was 
completed as scheduled, and no anomalies were reported.

    1.27 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-105228 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.  The observations were executed as 
scheduled, and no anomalies were noted.

    1.28 Completed Two Sets of STIS/CCD 8545 (POMS Test Proposal: STIS 
Non-Scripted Parallel Proposal Continuation VI)

        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.

    1.29 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.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions: 25
Successful: 25

  Scheduled Re-acquisitions: 21
Successful: 21

    2.2 FHST Updates:
Scheduled: 57
Successful: 57

    2.3 Operations Notes:

        Servicing Mission Observatory Verification (SMOV) continues.  The 
operations team began the weekend on CCS string "G", and switched to CCS 
string "A" at 043/1300Z.  When the SAC server on "A" experienced problems 
at 044/2316Z, the team returned to "G" string at 044/2340Z.

        ESTR-1 was powered on at 042/1334Z for the CCS ESTR Playback 
Test.  Per ROP RD-6 ESTR spooling was performed at 042/1339Z, Then, per ROP 
RD1A, ESTR-1 was played back.

        There was a STIS EMC retry at 044/095322Z.  The STIS control 
section error counter was cleared at 044/0954Z.

        The STIS MCE-1 reset at 045/013055Z while the low voltage was on 
and while in an SAA interval.  The STIS flight software error counter was 
reset.  MAMA-1 will be recovered at 045/1332Z, the time of the next high 
voltage on, via normal SMS commanding.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of SMOV and normal science observations and calibrations.

/CAW