HUBBLE SPACE TELESCOPE

                              DAILY REPORT #1370

PERIOD COVERED:  0000Z (UTC) 04/14/95 - 0000Z (UTC) 04/17/95

Daily Status Report as of 107/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:


   1.1 Completed GHRS/1 5162 (A High Resolution UV Spectral Survey of the
Sharp Line Star Chi-Lupi

       The High Resolution Spectrograph (Side One) was used to make
ultraviolet Echelle spectrographic observations of the sharp lined chemically
peculiar star HD141556 (aka, Chi Lupi). The objective is to obtain a
spectroscopic data base for use in element abundance analysis, and as a
standard of reference for the study of normal and peculiar B and A class
stars. GHRS observations #65 was reported to have a carrousel reset failure
at 104/0440Z. A routine status buffer error message was received (HSTAR
5180). No other anomalies were noted.


   1.2 Completed FGS 6051 (Dynamical Masses For The Stars in the Pre-Main
Sequence Spectroscopic Class)

       The FGS were used to make astrometric measurements of the location of
star STAR-04562 (aka, GSC2387+535) to measure its relative orbit in a
pre-main sequence binary system. The observations were executed as scheduled,
and no anomalies were noted.

   1.3 Completed WF/PC-2 5672 (Ages For The Outermost Globular Clusters)

       The WF/PC-2 was used to make both deep and short exposure 
observations of the central regions of globular cluster PAL3-Centaurus. This
cluster was chosen as it represents an early staging in the formation of the
galaxy. The observations were executed as scheduled, and no anomalies were
noted.

   1.4 Completed WF/PC-2 5560 (WF/PC-2 Cycle 4 Calibration: Internal Monitor.
1) 

       The WF/PC-2 was used to make several internal bias, K-Spot, and flat
calibration observations to monitor the CCD camera electronics, the optical
alignment, and to check for contamination. The observations were completed as
planned, and no anomalies were noted. 

   1.5 Completed Five Sets of WF/PC-2 5479 (Subarcsecond Structure in Nearby
AGNs)

       The WF/PC-2 was used to make snapshot observations of the nearby
active galactic nuclei of TOL1059+10, NGC-3862, NGC-4507, HEAO0510+0 and
NGC-7552 to study the interactions between the central  engine, the stars,
and the interstellar matter in these AGNs. The observations were executed as
scheduled, and no anomalies were noted. 

    1.6 Completed Two Sets of FOS/BL 5723 (Constraints of Massive Star
Evolution From Carbon and Oxygen Abundance)

       The Faint Object Spectrograph (Blue Side) made ultraviolet
spectrographic observations of the massive Wolf-Rayet star HD32402 to study
its Carbon and oxygen abundances. The observations were completed as planned
and no anomalies were reported. 

  1.7 Completed GHRS/1 5412 (The Boundary Layer White Dwarf Connection: CV
White Dwarf Rotation)

      The High Resolution Spectrograph (Side One) was used to make
observations of the white dwarf nova star U-Gem after a period of outbursts.
The observations were completed as scheduled, and no anomalies were reported.

   1.8 Completed WF/PC-2 5397 (Determination of the Extragalactic Distance
Scale: Cycle 4 High)

       The WF/PC-2 was used to make images of galaxy NGC-4414 to be used in
measuring the periods of Cepheid variable stars within this galaxy. The
observations were completed as planned, and no anomalies were noted.

   1.9 Completed Two Sets of WF/PC-2 5167 (Jovian Auroral Lyman-Alpha
Profile: Cycle 4 )

       The WF/PC-2 was used to make observations of the northern auroral
regions of the planet Jupiter to study the excitation processes and
atmospheric properties in this region. The observations were completed as
planned, and no problems were reported.

   1.10 Completed FOS/BL 6146 (FOS Location of Spectra and Aperture - Part 2)

     The Faint Object Spectrograph (Blue Side) was used to conduct a test to
determine the repeatability of positioning the filter-grating wheel. All
observations were internal. Wavelength  and Dark calibration images were also
taken. All observations were executed as scheduled, and no anomalies were
noted.

   1.11 Completed WF/PC-2 5512 (Cores of Early Type Galaxies: Part II)

       The WF/PC-2 was used to make observations of the nucleus of early type
galaxy NGC-3377-NU. The observations were executed as scheduled, and no
anomalies were noted.

   1.12 Completed WF/PC-2 6142 (WF/PC-2 Cycle 4 Calibration: Earth Flats,
Smaller Set Part II)

       The WF/PC-2 was used to make Earth Flat calibration images for the
ultraviolet and narrow-band filters to correct for the telescope's
illumination pattern. The observations were executed as scheduled, and no
anomalies were noted.

   1.13 Completed FOC/96 5153 (UV-Bright Stars in Dwarf Galaxy Leo I)

       The Faint Object Spectrograph (f/96) was used to make ultraviolet
observations of UV bright start in the dwarf galaxy Leo I using several
different bypass filters. The intent is to search for a stellar UV flux
source that may account for the UV flux observed in normal galaxies. The
observations were executed as scheduled, and no anomalies were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 18
                                        Successful : 18


                         Scheduled Reacquisitions : 24
                                       Successful : 24

   2.2 FHST Updates: 

                              Scheduled : 28
                             Successful : 28

   2.3 Significant HSTARs: None

   2.4 Operations Notes: 

       There was only one data inversion this past week-end at STGT. The
problem appears to be fixed with new firmware.

       Engineers are looking closely at the FOS for possible microprocessor
reset problems.  

       At 0517Z today, while the GHRS was outputting science data at 4k, the
FOS went from low voltage to high voltage on the Blue Side. This voltage
transition evidently caused a spontaneous FOS microprocessor reset. These
resets have been seen several times before associated with exactly this
transition. Immediately after the time of the high voltage transition, a
series of status buffer messages were received. The final effect of these
events was to disable the GHRS SD interface. It is not yet known to what
extent the FOS and GHRS observations at the indicated time were affected. 
The next FOS Blue Side observation does not occur for some time, however, the
GHRS has a condition of the same proposal roughly 1556Z today. 

       On Saturday during a type-2 slew, bad counts were noticed for the HGA
spline. The counts quickly returned to normal, and no impact to on-going
operations was reported.

3.0 ANOMALY STATUS:

   3.1 Significant New Anomalies: None

   3.2 Significant Unresolved Anomalies: None

4.0 SIGNIFICANT FORTHCOMING EVENTS: 

        Nothing at this time.

/DMH
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