HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2303

PERIOD COVERED:  0000Z (UTC) 02/05/99 - 0000Z (UTC) 02/08/99

Daily Status Report as of 039/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Four Sets of STIS/CCD 7948 (CCD Dark and Bias Monitor --
Cont. to Dec. 98)

       The Space Telescope Imaging Spectrograph (CCD) was used to measure
CCD dark current and bias rates for the two supported amplifier settings
{GAIN=1 and GAIN=4} in order to gather data for making superdarks and
superbiases.  The data will be used to track the growth of hot pixels on
the CCD in general and within the various target acquisition apertures
specifically.  The observations were executed as scheduled, and no
anomalies were noted.

   1.2 Completed Five Sets of WF/PC-2 7713 (WF/P-2 Cycle 7 Supplemental
Darks pt3/3)

       The WF/PC-2 was used to make supplemental dark calibration images.
This dark calibration program obtains three dark frames every day to
provide data for monitoring and characterizing the evolution of hot pixels.
The observations were completed as planned, and no anomalies were noted.

   1.3 Completed Three Sets of WF/PC-2 6363 (The Environments and Host
Galaxies of BL-Lac Objects)

       The WF/PC-2 was used to make snapshot survey observations of BL-Lac
objects MS1221.8+2, MS1207.9+3 and 1ES1320+08 in order to study their
environment and their host galaxies.  The goal is to investigate systematic
trends in host galaxy type, unusual morphological features, nearby
companion galaxies, etc.  The observations were executed as scheduled, and
no anomalies were noted.

   1.4 Completed Fifteen Sets of STIS/CCD 8091 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation)

       The Space Telescope Imaging Spectrograph (CCD) was used to make high
galactic latitude, non-scripted, parallel observations.  The observations
were completed as planned, and no anomalies were noted.

   1.5 Completed WF/PC-2 7278 (The Connection Between The Obscuring Torus
and the Masing Disk in H_20 Me)

       The WF/PC-2 was used to investigate the connection between the
molecular torus and the emission line gas in megamaser NGC-449 (a.k.a.,
H_20).  The proposal completed nominally with no reported problems.

   1.6 Completed STIS/CCD/MA2 7748 (The Origins of Boron)

       The Space Telescope Imaging Spectrograph (CCD and MA2) was used to
make observations of the star BD-06D1250 which is part of the Orion OB1
class association in order to study the origins of Boron.  The youngest
stars show higher oxygen abundances than the oldest stars.  A wavelength
calibration image was also taken.  The observations were completed as
planned, and no problems were reported.

   1.7 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.

   1.8 Completed STIS/CCD/MA1 7305 (The Physical Characteristics of Small-
Scale ISM Structure)

       The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
make observations of the star HD32040 in order to measure the physical
characteristics of small-scale ISM structure.  A wavelength calibration
observation was also taken.  The observations were completed as planned,
and no anomalies were reported.

   1.9 Completed Two Sets of FOC/96 6349 (Snapshot Search for High Redshift
QSOs with Far-UV Flux)

       The Faint Object Camera (f/96) was used to make snapshot images of
the quasi-stellar object Q0046-293 and NGC-1808.  This is to determine if
this high redshifted object has a far ultraviolet flux.  The observations
were executed as scheduled, and no anomalies were noted.

   1.10 Completed STIS/CCD 7652 (LSF Measure of the CCD-Spectroscopic Modes)

       The Space Telescope Imaging Spectrograph (CCD) was used to make LSF
calibration observations of standard external source HEN1357.  The
observations were executed as planned, and no problems were noted.

   1.11 Completed STIS/CCD 8084 (POMS Test Proposal: STIS Non-Scripted
Parallel Proposal Continuation)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
non-scripted parallel high galactic latitude observations as part of POMS
test proposal.  The observations were executed as scheduled, and no
anomalies were noted.

   1.12 Completed STIS/CCD 7354 (Kinematics of Gaseous Disks in the Nuclei
of Liners with Compact Flat Spectrum Radio Sources)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the nuclei of the liner in the compact flat spectrum source
galaxy NGC-4594.  Many active galactic nuclei channel energetic particles
into jets that feed powerful extended lobes of radio emission; others
remain quite compact.  Both classes of active galaxies are suspected to be
powered gravitationally by the accretion of surrounding material onto a
massive black hole.  A wave length calibration image was also taken.  The
observations were completed as planned, and no problems were reported.

   1.13 Completed WF/PC-2 6362 (Supernova Host Galaxy)

       The WF/PC-2 was used to make observations of the supernova host
galaxy Gal-120039.  The observations were executed as scheduled, and no
anomalies were noted.

   1.14 Completed STIS/CCD 7332 (Improved Hubble Constant from the 0957+561
Gravitational Lens)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the gravitational lens system 0957+561 in order to improve
the value of the know Hubble Constant.  The image was made to be at least
one magnitude deeper than previous HST data in order to detect more faint
lensed structures.  The observations were executed as scheduled, and no
anomalies were noted.

   1.15 Completed Two Sets of WF/PC-2 6347 (A Search for Jets in Planetary
Nebulae)

       The WF/PC-2 was used to make observations of the planetary nebulae
(class PNe) PK242-11D1 and PK336-05D1 in order to search for the presence
of possible narrow jets.  The current model for PNe formation indicates
that jets are an unexpected phenomena, yet there is a growing body of
circumstantial evidence that suggests narrow jets are common feature in
PNe.  The observations were completed as scheduled, and no anomalies were
noted.

   1.16 Completed WF/PC-2 6358 (UV Imaging of Circumnuclear Starburst Rings)

       The WF/PC-2 was used to make ultraviolet snapshot observations of
galaxy NGC-1808 in order to study its circumnuclear starburst rings.  A
homogeneous database of properties of the star-forming region will be
generated.  The observations were executed as scheduled, and no anomalies
were noted.

   1.17 Completed Two Sets of WF/PC-2 6967 (Blue Continuum Snapshots of 3CR
Radio - Continued Galaxies)

       The WF/PC-2 was used to make observations of the radio galaxies
3C91.0 and 3C171.0.  Radio galaxies are an important class of extragalactic
objects: they represent one of the most energetic astrophysical phenomena
and they may be used as probes of their environments.  They are unique
probes of the early Universe.  The observations were completed as planned,
and no problems were reported.

   1.18 Completed STIS/MA1 7657 (STIS Spectroscopic and Imaging
Sensitivity, MAMA)

       The Space Telescope Imaging Spectrograph (MA1) was used to make
observations of G191B2B in order to study the spectroscopic and imaging
sensitivity.  Sensitivity measurements are done for all primary tilts of
the gratings and the prism used with the MAMAs, except for the G140L and
G230L gratings.  Imaging sensitivity measurements are done with all
apertures, including a neutral density filter.  A wavelength and a dark
calibration image were also taken.  The observations were executed as
scheduled, and no anomalies were noted.

   1.19 Completed WF/PC-2 6943 (WF/PC-2 Cycle 6: Throughput Verification
for Narrow Band Filters)

       The WF/PC-2 was used to make observations of object K3-69 in order
verify the throughput for the narrow band filters.  This program will
provide direct verification of throughput of narrow band filters through
observations of emission line objects.  The observations were completed as
planned, and no anomalies were reported.

   1.20 Completed STIS/CCD/MA1 7440 (Eclipse Mapping of the Touchstone
Binary System YY Gem)

       The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
make eclipse mapping observations of the touchstone eclipsing binary star
system YY-Gem.  Solar images clearly demonstrate that its atmosphere
consists not of homogeneous, temperature-stratified layers, but rather of
discrete structures on spatial scales ranging from <100 km to a large
fraction of the solar radius, non-uniformly distributed across the solar
disk.  A wavelength calibration image was also taken.  The observations
were completed as planned, and no anomalies were reported.

   1.21 Completed STIS/CCD/MA1 7937 (MAMA Off Axis Sensitivity {Vignetting})

       The Space Telescope Imaging Spectrograph (CCD and MA1) was used to
make observations of GD71 in order to study off axis vignetting in the MA1
detector.  The observations were completed as planned, and no anomalies
were reported.

   1.22 Completed WF/PC-2 6360 (A Snapshot Survey of "Radio Loud" IRAS
Galaxies)

       The WF/PC-2 was used to make snapshot survey observations of the
radio loud IRAS galaxy GAL-0514+0.  The WF/PC-2 was used to discern high
surface brightness structures in its post-starburst active nuclear regions.
The observations were completed as scheduled, and no anomalies were
reported.

   1.23 Completed WF/PC-2 6652 (Imaging the Gravitational Lens System
1422+231)

       The WF/PC-2 was used to make observations of quasar QSO-1424P23 to
look for a gravitationally lensed system.  This quasar offers the exciting
prospect of a direct measure of the Hubble constant.  The observations were
completed as scheduled, and no anomalies were noted.

   1.24 Completed STIS/CCD 7672 (STIS CCD Sensitivity Monitor)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of standard star AGK+81D266 in order to monitor the
sensitivity of each CCD grating mode to detect any change due to
contamination or other causes.  A wavelength calibration image was also
taken.  The observations were completed as scheduled, and no anomalies were
noted.

    1.25 Completed WF/PC-2 7505 (The Hubble Diagram for Distant Supernovae
Measuring Cosmic Deceleration and Global Curvature)

       The WF/PC-2 was used to make observations of Super Novae SN1999B1,
SN1999A1 and SN1999A2 in order to produce a precise Hubble diagram from
measuring cosmic deceleration and global curvature.  HST can make an
essential contribution by providing photometry with substantially higher
precision and better temporal coverage than can be obtained from the
ground.  The observations were completed as planned, and no anomalies were
reported.

   1.26 Completed WF/PC-2 7381 (Thackeray's Globules in IC 2944: H-Alpha
Imaging with WF/PC-2)

       The WF/PC-2 was used to make H-Alpha observations of the Thackeray's
globules located in the southern H-II region of IC2944.  These globules are
unique because they lie almost exactly on the line of sight from the
ionizing OB cluster to the earth, and hence are seen starkly silhouetted
against the H-II region.  The observations were completed as planned, and
no problems were reported.

   1.27 Completed WF/PC-2 6366 (The Early Onset of Asymmetric Outflow
During the Planetary Nebula formation)

       The WF/PC-2 was used to make observations of the planetary nebula
IRAS08005 in order to study its asymmetric outflow during its formation.
The purpose of these exposures was to determine the characteristics of the
mass loss that occurs as a star leaves the asymptotic giant branch.  The
observations were completed as planned, and no problems were reported.

   1.28 Completed WF/PC-2 6835 (The Detail Morphology of Post-Merger Galaxies)

       The WF/PC-2 was used to make observations of the post-merger galaxy
GAL-0217-4 in order to study its morphology.  This galaxy has little or no
on-going star formation and a significant population of young stars.  The
observations were executed as scheduled, and no anomalies were noted.

   1.29 Completed Two Sets of WF/PC-2 6673 (Black Holes and Gas Disks in a
Complete Sample of Radio Loud UGC Ellipticals)

       The WF/PC-2 was used to make observations of radio load, elliptical
galaxy UGC-09058 in order to search for possible black holes and gas disks.
Hydrogen-Alpha and broad band observations were taken to determine the
luminosity profiles and stellar populations (on the tens of parsec scale),
and detect nuclear regions or disks of gas and dust.  The observations were
completed as planned, and no anomalies were reported.

   1.30 Completed STIS/CCD 7639 (STIS CCD Imaging Sensitivity Monitor)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the globular cluster NGC-5139 (a.k.a., Omega Cen) in order
to monitor the CCD's sensitivity.  This proposal should give a check on the
long-term, full-field photometric stability of the instrument.  A bias
observations and a dark calibration image were also taken.  The
observations were executed as scheduled, and no anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 35
                                        Successful : 35

                          Scheduled Reacquisitions : 18
                                        Successful : 18

   2.2 FHST Updates:

                              Scheduled : 77
                             Successful : 77

   2.3 Operations Notes:

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

       A TTR was opened to document data inversions.

       Per HSTAR 6971, the tempertures for batteries 5 and 6 began flagging
out of limits high at approximately 036/205346Z.  Eventually, at 037/1634Z,
the battery 6 SPA trim relay was opened.  Later, at 038/115822Z, the
battery 2 current began registering high current values during a period of
high spacecraft activity, including a slew.  HSTAR 6974 was written.

       The NICMOS FPA-3 temperature sensor was observed to have a value
greater than 300 degrees K.  HSTAR 6972 describes this event.  ROP NS-12
was used to reset the SI C&DH error.  An operations request was executed at
036/2152Z to reset the temperature sensor.  As documented in HSTAR 6973,
the NICMOS FPA-3 temperature again had a value greater than 300 degrees K.
Another operations request was performed at 038/035509Z to reset the
temperature sensor.

       The NSSC-1 status buffer was dumped at 036/2341Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH