HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2101

PERIOD COVERED:  0000Z (UTC) 04/13/98 - 0000Z (UTC) 04/14/98

Daily Status Report as of 104/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 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.

   1.2 Completed STIS/CCD 7964 (The Host Galaxy of GRB 971214)

       The Space Telescope Imaging Spectrograph (CCD) made observations of
the host galaxy of GRB-971214.  Spectroscopy with the Keck telescope shows
the presence of a strong emission feature in this object.  The observations
were executed as scheduled, and no anomalies were noted.

   1.3 Completed Four 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.

   1.4 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.

   1.5 Completed NIC/2 7960 (NICMOS Persistence Test)

       The Near Infrared Camera (Camera Two) was used to conduct a
persistence test.  The goal of these tests is to determine whether multiple
reads hasten the reduction of image persistence from infrared photons and
cosmic rays.  The observations were completed as planned, and no anomalies
were reported.

   1.6 Completed Two 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.

   1.7 Completed Two Sets of STIS/MA1 7355 (Continuous Ultraviolet
Monitoring of NGC 3516)

       The Space Telescope Imaging Spectrograph (MA1) was used to make
continues ultraviolet observations of galaxy NGC-3516.  Recent intensive
IUE monitoring of NGC 4151 and other AGN reveal rapid aperiodic variations
down to the shortest time scales yet probed {~80 min}, strongly correlated
throughout the UV and X-ray with no detectable interband lag.  A wavelength
calibration image was also taken.  During the second iteration of this
proposal, the losses of lock mentioned in 2.1 occurred, temporarily taking
down the take data flag.  Otherwise, the observations were completed as
planned, and no further anomalies were reported.

   1.8 Completed WF/PC-2 7501 (Expansion Parallax Distances to Planetary
Nebulae)

       The WF/PC-2 was used to make parallax distance measurements of the
planetary nebula NGC-6565.  The largest impediment to our understanding of
planetary nebulae {PNe} is the lack of reliable distances. Acquired by
generalized statistical methods in all but a handful of cases, individual
PNe distances are often uncertain by factors of two or more.  The
observations were executed as scheduled, and no anomalies were noted.

   1.9 Completed 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.

   1.10 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.

   1.11 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.

   1.12 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 LHS194.  This
star is known to be within 10 parsecs of the Sun.  The observations were
executed as scheduled, and no anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 5
                                        Successful : 5

                          Scheduled Reacquisitions : 4
                                        Successful : 4

       There were four losses of lock during the re-acquisition at
103/2342Z, affecting the proposal described in 1.7 above.

   2.2 FHST Updates:

                              Scheduled : 9
                             Successful : 9

   2.3 Operations Notes:

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

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science observations and calibrations.

/DMH