HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2061

PERIOD COVERED:  0000Z (UTC) 02/13/98 - 0000Z (UTC) 02/17/98

Daily Status Report as of 048/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Five Sets of STIS/CCD 7674 (IR Standards)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of Feige34, GD71, HZ44, P041C and P177D to establish a set of
absolute flux standards on the WD scale that extend the existing wavelength
coverage to 10300A with the STIS G750L grating setting.  During the third
iteration of this proposal, the acquisition default described in 2.1
occurred.  Otherwise, the proposal completed with no further reported
problems.

   1.2 Completed Eight Sets of WF/PC-2 7621 (WF/PC-2 Cycle 7 Supplemental
Darks PT1/3)

       The WF/PC-2 was used to make supplemental dark calibration images.
This set of calibrations is intended to obtain three dark frames every day
to provide data for monitoring and characterizing the evolution of hot
pixels. During the third iteration of this proposal, the acquisition
default described in 2.1 occurred.  Otherwise, the observations were
executed as scheduled, and no further anomalies were noted.

   1.3 Completed Four Sets of STIS/CCD 7803 (Daily Darks to Update
Acquisition Bad Pixel Table Part III)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
daily dark calibration updates.  These daily darks are intended to identify
hot pixels for update to the acquisition on-board FSW hot pixel table.
Daily hot pixel lists can also be used for science data analysis. During
the second iteration of this proposal, the acquisition default described in
2.1 occurred.  Otherwise, the observations were completed as planned, and
no further anomalies were reported.

   1.4 Completed Four Sets of WF/PC-2 7387 (T-Tauri Star Snapshot Survey)

       The WF/PC-2 was used to make observations of the stars HD-181204,
FN-Tau, RW Aur and ANON-1 as part of a T-Tauri class star survey.  The
observations were executed as scheduled, and no anomalies were noted.

   1.5 Completed Twent Eight Sets of STIS/CCD 7908 (POMS Test Proposal:
STIS Non-Scripted Parallel Proposal)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
calibration observations as part of the POMS Test Proposal.  This was a
STIS non-scripted parallel proposal.  The observations were completed as
planned, and no problems were reported.

   1.6 Completed Two Sets of WF/PC-2 7386 (A Snapshot Survey of Nova Shells)

       The WF/PC-2 was used to make observational images of the super nova
shell V1979-Cyg in order to detect and measure its expanding gaseous shell.
These observations will trace the distribution of hot and cool gas in the
nova shells, and show their degree of inhomogeneity on both large and small
scales.  During the first iteration of this proposal, there was an
acquisition failure described in the previous report and in HSTAR 6342, and
the take data flag remained down.  Otherwise, the observations were
completed as scheduled, and no problems were noted.

   1.7 Completed STIS/CCD 7665 (CCD Geometric Distortion)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the standard star HD120315 in order to derive the geometric
distortion of CCD first order spectra for those cases {G230LB, G230MB and
1854A} that were missed in ground calibration.  The observations were
executed as scheduled, and no anomalies were noted.

   1.8 Completed Three Sets of WF/PC-2 7336 (Cosmological Parameters Omega
and Lambda From High-Redshift Type Ia Supernovae)

       The WF/PC-2 was used to make observations of the high redshifted
Type Ia supernovae SN-8H-Z0, SN1-5H-Z0 and SN4-8H-Z0HST by making a direct
measurement of the cosmological parameters, Omega, Lambda, and curvature,
using Type Ia supernovae as calibrated "standard candles."  The
observations were executed as scheduled, and no anomalies were noted.

   1.9 Completed Eight Sets of WF/PC-2 7909 (POMS Test Proposal: WF II
Parallel Archive Proposal)

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

   1.10 Completed NIC/1/2/3 7261 (The Distance to M96 from H-band Cepheid
Observations)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of NGC-3368 (a.k.a., M-96) to measure its distance by
using Cepheids as "standard candles".  Determination of the Hubble constant
is a primary goal of HST.  The observations were executed as scheduled, and
no anomalies were noted.

   1.11 Completed NIC/2 7338 (A Study of the Gravitational Lensing
Potential in MG 0414+0534)

       The Near Infrared Camera (Camera Two) was used to make observations
of the quadruple gravitational lens system MG0414+0534 in order to search
for new gravitational lensing effects.  It is intended to determine whether
the primary lens galaxy and its dark halo are sufficient to explain the
observed lensing geometry or whether there are significant external tidal
perturbations.  The observations were completed as scheduled, and no
anomalies were reported.

   1.12 Completed Three Sets of WF/PC-2 7625 (WF/PC-2 Cycle 7 Earth Flats)

       The WF/PC-2 was used to make a series of Earth flat calibration
images.  These flat fields will allow mapping of the OTA illumination
pattern and will be used in conjunction with previous internal and external
flats to generate new pipeline superflats.  The observations were completed
as planned, and no anomalies were reported.

   1.13 Completed STIS/CCD 7711 (STIS CCD G750L Fringing Flats.)

       The Space Telescope Imaging Spectrograph (CCD) was used to
investigate and monitor the STIS CCD flat-field fringing in the G750L
grating at its nominal wavelength setting {7751A}.  WAVECALs were also
taken at the same gain and wavelength setting.  Typical S/N = 100 for each
integration, and gain = 4 on each.  The observations were executed as
scheduled, and no anomalies were noted.

   1.14 Completed Two Sets of WF/PC-2 7384 (Probing the Fine-Scale
Structure and Colors of Interstellar "Cirrus" Clouds)

       The WF/PC-2 was used to make observations of the nebula Neb-011548
in order to probe the fine-scale structure and colors of interstellar
"cirrus" clouds.  The ubiquitous nature of Galactic "cirrus" clouds make
them both: {1} accessible targets for the study of the properties of
interstellar dust grains, and {2} sources of confusion in investigations of
distant objects {e.g. galaxies, clusters of galaxies} at low surface
brightness levels.  The observations were completed as planned, and no
problems were reported.

   1.15 Completed FGS 6880 (Parallax of RW Tri)

       The FGSs were used to make astrometric observations of the variable
star RW-Tri.  RW-Tri is an old nova for which a precise parallax would
increase the validity of any astrophysical investigations.  The
observations were completed as planned, and no problems were reported.

   1.16 Completed Three Sets of NIC/1/2/3 7850 (Cosmological Parameters
Omega and Lambda from High-Z Type Ia Supernovae)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of high Z type Ia supernovae SN97226, SN97201 and SN97236
in order to measure the Omega and Lambda parameters.  Type Ia supernovae
{SNe Ia} can be used as calibrated standard candles to measure large
distances.  The observations were completed as planned, and no anomalies
were reported.

   1.17 Completed Three Sets of NIC/2 7495 (Survey of Gravitational Lenses
as Cosmological Tools)

       The Near Infrared Camera (Camera Two) was used to make survey
observations of HST12531-2 by obtaining deep, high-resolution images in the
optical and near IR in order to see if they are gravitational lenses and
could be used as a cosmological tool.  The observations were executed as
scheduled, and no anomalies were noted.

   1.18 Completed Two Sets of NIC/1/2/3 7249 (Line, Continuum,and
Polarimetric Observation of AFGL 437)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make line, continuum and polarimetric observations of AFGL-437.  The higher
spatial resolution of NICMOS will determine if this is the correct
component and measure the flows near the star as indicated by the direction
of the polarization vectors.  The observations were executed as scheduled,
and no anomalies were noted.

   1.19 Completed STIS/CCD 7654 (Slitless Spectroscopy, CCD)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
slitless spectrographic observations of the variable star AX-Per.  The
purpose of this observation is to calibrate the dispersion solution and the
sensitivity as a function of the target-position in slitless spectroscopy.
A wavelength calibration image was also taken.  The observations were
completed as planned, and no anomalies were reported.

   1.20 Completed Two Sets of NIC/2/3 7907 (NICMOS Pure Parallel Winter 97-98)

       The Near Infrared Camera (Cameras Two and Three) was used to make
pure parallel spectrographic observations of sky regions when another
instrument is prime.  The observations were completed as planned, and no
anomalies were reported.

   1.21 Completed NIC/1/2/3 7880 (A Search For Old Stars in IZw18, Continued)

        The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of galaxy IZW18 to search for old stars.  The blue
compact dwarf galaxy IZw18 still stands out as one of the most interesting
objects at low redshift.  Its heavy element abundance is the lowest ever
measured in the ionized gaseous component of a galaxy.  The observations
were completed as scheduled, and no anomalies were reported.

   1.22 Completed NIC/2 7420 (A Near-Infrared Search for Very Low Mass
Companions to Stars Within 10 Parsecs of the Sun)

       The Near Infrared Camera (Camera Two) was used to make searching
observations for very low mass companions to variable star LHS215.  This
star is known to be within 10 parsecs of the Sun.  The observations were
executed as scheduled, and no anomalies were noted.

   1.23 Completed Two Sets of NIC/1/2/3 7447 (The Cosmological Evolution of
Quasar Host Galaxies)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of galaxy BVF247 as part of a survey to study the
cosmological evolution of galaxies which host quasars.  Other point spread
function observations were taken to test the calibration of the cameras.
The observations were executed as scheduled, and no anomalies were noted.

   1.24 Completed NIC/1/2/3 7172 ([Fe-II] and [Si-VI] Line Imaging of
Seyfert Galaxies)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of Seyfert Galaxy NGC-5548 to study Fe-II and Si-VI line
imaging.  The two forbidden lines [Fe-II] and [Si-VI] have very different
critical densities and would be expected to originate from very different
regions in a Seyfert galaxy nucleus.  The observations were completed as
planned, and no problems were reported.

   1.25 Completed STIS/CCD 7926 (CCD Dark and Bias Monitor -- Continued)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
several dark and bias calibration observations.  This is 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.  These observations  will also 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.

   1.26 Completed STIS/CCD 7634 (CCD Flat-Field Stability and Cosmetic
Defect Fraction)

       The Space Telescope Imaging Spectrograph (CCD) was used to
investigate and monitor the STIS CCD imaging flat-field stability and
cosmetic defects over monthly periods though out Cycle 7.  The observations
were executed as scheduled, and no anomalies were noted.

   1.27 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 loud, elliptical
galaxy UGC00597 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.

   1.28 Completed WF/PC-2 6776 (A Comparative HST Imaging Study of Radio
Galaxies and Hosts)

       A clear understanding of the nature of the host galaxies of
radio-quiet quasars, radio-loud quasars and radio galaxies is of central
importance in any attempt to unify and relate the three main classes of
powerful active galaxies.  Existing HST studies of quasar hosts, whilst
producing many interesting new results, have yielded surprisingly little
hard information on the properties of the hosts themselves.  This imaging
study using the WF/PC-2 will remedy this situation by undertaking redder,
line-free observations of our three matched AGN samples.  The proposal
completed with no reported problems.

   1.29 Completed WF/PC-2 6681 (Evolution of Pre-Main Sequence
Circumstellar Nebulosity)

       The WF/PC-2 was used to make observations of V892-Tau to study the
evolution of pre-main sequence circumstellar nebulosity.  Initial HST
results from imaging of disks around pre-main sequence stars provide
compelling justification to observe a broader sample of young stars.  The
observations were completed as planned, and no anomalies were reported.

   1.30 Completed Four Sets of WF/PC-2 7620 (WF/PC-2 Cycle 7 Standard Darks)

       The WF/PC-2 was used to make a series of Cycle 7 standard dark
calibration images.  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.

   1.31 Completed WF/PC-2/STIS/MA2 7410 (Deep UV Imaging of the Hubble Deep
Field)

       The WF/PC-2 was 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.

   1.32 Completed Two Sets of STIS/MA2 7604 (Cycle 7 MAMA Dark Measurements)

       The Space Telescope Imaging Spectrograph (MAMA-2) was used to make
MAMA dark measurements.  These darks will be used in later image reductions
and also trended over the instrument's life time as an indicator of the
detector's degradation or damage.  The observations were completed as
scheduled, and no problems were reported.

   1.33 Completed STIS/MA1 7651 (STIS MAMA Dispersion Solution Check)

       The Space Telescope Imaging Spectrograph (MAMA-1) was used to make
MAMA dispersion solution checks.  Wavelength dispersion solutions will be
determined on a yearly basis as part of a long-term monitoring program.
The observations were completed as scheduled, and no anomalies were
reported.

   1.34 Completed WF/PC-2 7376 (Understanding Halo Microlensing and
Variable Stars in M31: 1} Snapshot Survey of Candidates)

       The WF/PC-2 was used to make observations of the galaxy M-31-Lens
system to help understand its halo microlensing and Variable Stars.  Six
microlensing candidates affecting stars in M31 and presumably due to
sub-solar-mass MACHOs are being studied.  Simultaneously we can explored
the stellar population in the relatively unexplored disk/bulge transition
via its variable stars, luminosity function and color- magnitude diagram.
The observations were executed as scheduled, and no anomalies were
reported.

   1.35 Completed NIC/2 7175 (H-2 Imaging of Photon-Dominated Regions {PDRs})

       The Near Infrared Camera (Camera Two) was used to make imaging of
the photon dominated regions in IC63.  The Orion Bar feature southeast of
the Trapezium is a well studied PDR with some very interesting chemical and
physical features.  Molecular hydrogen {H-2} emits strong near-infrared
line emission.  The observations were completed as planned, and no
anomalies were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 36
                                        Successful : 35

       Per HSTAR 6373, the acquisition at 045/004304Z defaulted to fine
lock on FGS-2 only when the scan steps limit was exceeded on FGS-1.  The
proposals described in 1.1, 1.2, and 1.3 may have been affected.

                          Scheduled Reacquisitions : 22
                                        Successful : 22

   2.2 FHST Updates:

                              Scheduled : 77
                             Successful : 77

   2.3 Operations Notes:

       Reconditioning of ESTR-2 was completed at 047/1459Z; ESTR-3, at
048/0909Z.  The procedures were performed in accordance with ROP RD-7.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH