HUBBLE SPACE TELESCOPE

                       DAILY REPORT #2402

PERIOD COVERED:  0000Z (UTC) 06/25/99 - 0000Z (UTC) 06/28/99

Daily Status Report as of 179/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Six Sets of STIS/CCD 7949 (CCD Dark and Bias Monitor -- Cont.
to June 99)

       The Space Telescope Imaging Spectrograph (CCD) was used to conduct a CCD
dark calibration and a bias monitoring program.  It was also scheduled 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 Seven 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.  

   1.3 Completed Four 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 3C464.0,
3C66.0A, 3C268.3 and 3C389.0.  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.  

   1.4 Completed Twelve Sets of STIS/CCD 8406 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation V)

       The Space Telescope Imaging Spectrograph (CCD) was used to make high
galactic latitude observations taken in parallel with the prime science
observations as part of a POMS proposal.  This is a STIS non-scripted parallel
Condition V proposal.  The observations were completed as scheduled, and no
anomalies were reported.  

   1.5 Completed Three Sets of WF/PC-2 6354 (Measuring Luminosity Evolution in
Z = 0.3 Field Galaxies)

       The WF/PC-2 was used to make snapshot observations of the galactic
cluster Gal-Cluster-0732 located at a distance of Z = 0.3.  The targets were
drawn from a much larger pool of galaxies for which the internal kinematics
have been measured from an extensive ground based program.  The observations
were executed as scheduled, and no anomalies were noted.

   1.6 Completed STIS/CCD/MA1 8165 (Pervasive Hot Gas Hidden in Galaxy Groups:
A Substantial Baryon Reservoir?)

       The Space Telescope Imaging Spectrograph (MA1) was used to make
observations of galactic cluster H1821+643 to look for pervasive hot gas in the
intracluster media.  Cosmological simulations predict that at z ~ 0, most
groups of galaxies should be embedded in large filaments and sheets of shock
heated gas at 10^5 -- 10^6 ^degrees K.  A wavelength calibration image was also
taken.  The observations were executed as scheduled, and no anomalies were
noted.  

   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 8179 (The Composition and Evolution of Extremely
Hot DA White Dwarfs)

       The Space Telescope Imaging Spectrograph (CCD and MA1) was used to make
ultraviolet observations of the extremely hot white dwarf star REJ1738+66 in
order to study its composition and evolution.  This star has a temperature
range from 70,000 to 130,000 degrees K.  A wavelength calibration image was
also taken.  The observations were completed as planned, and no anomalies were
reported.  

   1.9 Completed Three Sets of WF/PC-2 6356 (SNAPSHOT Survey of Ultraluminous
Infrared Galaxies)

       The WF/PC-2 was used to make observations of galaxies Gal-201059,
Gal-205046 and Gal-134656as part of a survey of ultraluminous infrared
galaxies.  The nature of ultraluminous infrared galaxies has generated
considerable controversy.  The two main issues are: {1} are they powered by
violent bursts of star formation or by hidden quasars?  {2} are interactions
and mergers invariably involved?  The observations were executed as scheduled,
and no anomalies were noted.  

   1.10 Completed WF/PC-2 8269 (The Morphological Evolution of Field Galaxies)

       The WF/PC-2 was used to make observations of the near-infrared field
galaxy Pisces-4 in order to study its morphology.  The observations were
completed as planned, and no anomalies were reported.  

   1.11 Completed STIS/CCD 7275 (Kinematics of the Helical Jets in the Seyfert
Galaxy ESO428-G14)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the helical jets in the Seyfert galaxy ESO428-G14.  An
increasing number of synchrotron-emitting jets from active galactic nuclei are
found to have helical morphologies.  A wave length calibration image was also
taken.  The observations were completed as planned, and no problems were
reported.   

   1.12 Completed STIS /MA1 7508 (Ultraviolet Line Eclipses by Extrasolar
Planets)

       The Space Telescope Imaging Spectrograph (MA1) were used to make
observations of star HD120136 in order to obtain ultraviolet line eclipses by
extrasolar planets.  One of the most exciting events in astronomy last year was
the discovery of extrasolar planets.  A wavelength calibration image was also
taken.  The observations were completed as planned, and no problems were
reported.  

   1.13 Completed STIS/MA2 8312 (Low Column Density Lyman-Alpha Absorbers at
z=1.2: High SNR Echelle Spectroscopy of PG 1634+706)

       The Space Telescope Imaging Spectrograph (MA2) was used to make high
signal-to-noise ratio Echelle spectrographic observations of the super nova
remunerate PG1634+706 to observe low column density Lyman-Alpha absorbers.  A
wavelength calibration image was also taken.  The observations were completed
as planned, and no anomalies were reported.  

   1.14 Completed WF/PC-2 6355 (A UV Atlas of Nearby Galaxies)

       The WF/PC-2 was used to make ultraviolet observations of the nearby
galaxy NGC-2336.  The aim of the project is to build a reference ultraviolet
atlas of galaxies whose optical images are well known, with the highest
possible degree of information, covering all the morphological types and
luminosity classes.  The observations were executed as scheduled, and no
anomalies were noted. 

   1.15 Completed Two Sets of WF/PC-2 6469 (Pyramid Imaging of Circumstellar
Material About Nearby Stars)

       The WF/PC-2 was used to make observations of the curcumstellar material
around the nearby star HD230321.  The WF/PC-2 pyramid was used as a coronagraph
to detect the circumstellar material.  The observations were executed as
scheduled, and no anomalies were noted. 

   1.16 Completed Two Sets of STIS/CCD 8470 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation V)

       The Space Telescope Imaging Spectrograph (CCD) was used to make high
galactic latitude observations taken in parallel with the prime science
observations as part of a POMS proposal.  This is a STIS non-scripted parallel
Condition VI proposal.  The observations were completed as scheduled, and no
anomalies were reported.  

   1.17 Completed STIS/CCD 8172 (STIS Deep DLA Imaging Survey II)

       The Space Telescope Imaging Spectrograph (CCD) was used to make deep
observations of quasar/alpha galaxy Q0049-2820The HST imaging, together with
ground-based spectroscopy, will unify absorption-line studies and faint galaxy
imaging studies, providing a comprehensive picture of the history of assembly,
star formation, gas consumption, and chemical enrichment in the Damped
Lyman-Alpha galaxies.  The observations were executed as scheduled, and no
anomalies were noted.  

   1.18 Completed WF/PC-2 8436 (POMS Test Proposal: WFII Backup Parallel
Archive Proposal II)

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

   1.19 Completed WF/PC-2/STIS/CCD/MA1 8015 (Properties of the Lyman-Alpha
Forest and Metal-Line Systems at Low Z)

       The WF/PC-2 and the Space Telescope Imaging Spectrograph (CCD and MA1)
were used to make observations of the Lyman-Alpha forest and the Metal line
systems in radio galaxy 3C351.  This program seeks to learn more about the
properties of metal-line systems and the Lyman-alpha forest at low redshifts. 
A wavelength calibration image was also taken.  The observations were executed
as scheduled and no anomalies were noted.  

   1.20 Completed STIS/CCD/MA1 7292 (Measurement of the Cosmological Baryon to
Photon Ratio)

       The Space Telescope Imaging Spectrograph (CCD and MA1) was used to make
observations of PG1634+706 in order to study its cosmological barion to proton
ratio.  The primordial D/H ratio is the most sensitive measure of the baryon to
photon ratio, a fundamental cosmological number with wide ranging uses.  A
wavelength calibration image was also taken.  The observations were completed
as planned, and no problems were reported.  

   1.21 Completed WF/PC-2 8085 (Imaging of High Redshift Starburst Galaxies in
the Light of Lyman-Alpha)

       The WF/PC-2 was used to make Lyman-Alpha wavelength observations of the
high redshifted starbursting galaxy Q0100+130.  The observations were completed
as planned, and no anomalies were reported.  

   1.22 Completed WF/PC-2 6351 (Resolving SDB Binary Systems)

       The WF/PC-2 was used to make high resolution image of the sdB class,
binary system STAR-00420 in order to try and resolve its two individual stars. 
Evidence has accumulated that a large fraction (if not all) of the sdB class
stars are found in binary systems.  The observations were executed as
scheduled, and no anomalies were noted. 

2.0 FLIGHT OPERATIONS SUMMARY:

   2.1 Guide Star Acquisitions: 

                            Scheduled Acquisitions : 23
                                        Successful : 23

                          Scheduled Reacquisitions : 8
                                        Successful : 8

   2.2 FHST Updates: 

                              Scheduled : 50
                             Successful : 50

   2.3 Operations Notes: 

       The Flight Operations Team returned to the STOCC area, still using the
PR S ground system, at 178/2250Z.

       The SSR EDAC error counter was cleared ten times per ROP SR-1.

3.0 SIGNIFICANT FORTHCOMING EVENTS: 

       Continuation of normal science observations and calibrations.

/DMH