HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2114

PERIOD COVERED:  0000Z (UTC) 04/30/98 - 0000Z (UTC) 05/01/98

Daily Status Report as of 121/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Three Sets of WF/PC-2 7712 (WF/PC-2 Cycle 7 Supplemental
Darks pt2/3)

       The WF/PC-2 was used to make a series of Cycle 7 supplemental
calibration darks.  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 executed as scheduled, and no
anomalies were noted.

   1.2 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.

   1.3 Completed Three Sets of NIC/2 7227 (A Search for Low
Mass/Sub-Luminous Companions to M-Stars)

       The Near Infrared Camera (Camera Two) was used to make a search for
low mass/sub-luminous companions to low mass M class stars.  Knowledge of
stellar and sub-stellar masses and luminosities at and below the ~0.08
M{sun} H-burning limit is of fundamental importance.  A dark calibration
image was also taken.  The observations were completed as planned, and no
problems were reported.

   1.4 Completed 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.  The
observations were completed as planned, and no anomalies were reported.

   1.5 Completed NIC/2 7330 (The Fueling of Active Nucleii: A NICMOS
Snapshot Survey)

       The Near Infrared Camera (Camera Two) was used to probe the dark
matter distribution of M31 far from the center by observing intervening
absorption from the MgII doublet (lambda 2800) in the spectrum of one
background QSO located in a geometrically optimal position.  HST
observations are required because this feature is in a wavelength range not
accessible from the ground, and the QSO magnitudes and expected strength of
absorption make IUE observations unfeasible.  The proposal completed as
expected with no anomalies.

   1.6 Completed WF/PC-2/STIS/CCD/NIC/1/2/3 7307 (The Formation and
Evolution of Rich Star Clusters in the LMC)

       The WF/PC-2, the Space Telescope Imaging Spectrograph (CCD), and the
Near Infrared Camera (Cameras One, Two, and Three) were used to make
observations of the rich star clusters which are located within the Large
Magellanic Cloud in order to study their formation and evolution.  These
observations will help us understand the origin and evolution of rich star
clusters in our own galaxy.  The observations were completed as scheduled,
and no anomalies were reported.

   1.7 Completed STIS/CCD/MA1/NIC/3/WF/PC-2 7580 (UV Imaging and
Spectroscopy of High Excitation Herbig-Haro Objects)

       The Space Telescope Imaging Spectrograph (CCD/MA1), the Near
Infrared Camera (Cmaera Three), and the WF/PC-2 were used for far UV
imaging and long-slit spectroscopy to investigate the morphology and
physical conditions in high excitation Herbig-Haro objects.  FUV imaging in
a bandpass containing the CIV emission line will delineate the morphology
of high excitation gas and identify regions suitable for followup
spectroscopy.  Low resolution {G140L} long-slit spectroscopy will identify
and map the various ionic and molecular components of the FUV emission.
Medium resolution {G140M} long-slit spectroscopy will provide maps of the
velocity structure in the CIV emission and will probe the physical
conditions producing fluorescent emission from molecular hydrogen.  The
proposal was completed as scheduled with no reported anomalies.

   1.8 Completed Two Sets of NIC/2/STIS/CCD/WF/PC-2 7220 (Imaging of Quasar
Host Galaxies)

       The Near Infrared Camera (Camera Two), the Space Telescope Imaging
Spectrograph (CCD), and the WF/PC-2 were used to make direct imaging
observations of the host galaxy for the broad absorption line quasar
QSO0852+18.  The observations were completed as planned, and no anomalies
were reported.

   1.9 Completed Two 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 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 supernova 14H0.5Z2.  HST can make 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.

   1.11 Completed 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.

   1.12 Completed 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.

   1.13 Completed NIC/1 7867 (NICMOS Imaging of the Dusty CfA Seyfert Nuclei)

       The Near Infrared Camera (Camera One) was used to make observations
of the Seyfert Galaxy NGC-5256.  These data will allow us to determine if
the Seyfert Type 1/2 dichotomy is best explained by the unified model, the
evolutionary picture, or a combination of both of these scenarios.  The
observations were executed as scheduled, and no anomalies were reported.

   1.14 Completed Two Sets of STIS/CCD 7911 (STIS Galactic Plane Pure
Parallel Program)

       The Space Telescope Imaging Spectrograph (CCD) was used to make low
galactic latitude survey observations in parallel with the prime science
observations.  Short exposures with the 50CCD imaging mode will provide the
wavelength zero-point calibration.  These data will be placed immediately
into the Hubble Data Archive.  The observations were executed as scheduled,
and no anomalies were noted.

   1.15 Completed NIC/1/2/3 7840 (Near-IR Imaging and Polarimetry of
Bipolar Proto-Planetary Nebulae)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
make near-infrared observations of the bipolar proto-planetary nebula
IRAS10178.  The origin of the rich variety of morphologies observed in
planetary nebulae {PN} is one of the major unsolved problems in stellar
evolution.  The observations were executed as scheduled with no anomalies.

   1.16 Completed NIC/1/2/3 7825 (The Extraordinary Circumstellar
Environment of U Equ)

       The Near Infrared Camera (Cameras One, Two and Three) was used to
observe a recent-discovered star with an optical spectrum unlike any ever
observed.  Deep, narrow absorption lines of non-photospheric TiO, AlO, and
VO riddle the optical spectrum, and indicate a rotation temperature of ~700
K.  The observations were completed with no reported anomalies.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 11
                                        Successful : 11

                          Scheduled Reacquisitions : 5
                                        Successful : 5

   2.2 FHST Updates:

                              Scheduled : 23
                             Successful : 23

   2.3 Operations Notes:

       The SSR correctable EDAC counts were cleared three times using ROP SR-1.

       Operations personnel successfully conducted a flight test of RF
Transfer Switch #2 between 120/1325Z and 120/2114Z.  At the beginning of
this period several baseline power measurements and baseplate temperatures
were measured for comparison during the actual test.  The switch was then
cycled ten times (five per side), per the manufacturer's recommendation, in
order to clean the open contacts.  The switch was then returned to its
"straight-through" configuration, and another set of baseline measurements
was made.  This was followed by the test pass in which the switch was
cross-strapped, SSAT #1 was turned on, and a science recorder dump was
performed through HGA-2.  All signal levels observed at WSC were completely
normal, indicating correct operation of the RF components within the
switch.  SSAT #1 RF output power and baseplate temperature were completely
nominal throughout the exercise, with no problems encountered at any point.
Finally, the switch was configured to its normal straight-through position.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH