HUBBLE SPACE TELESCOPE

                       DAILY REPORT #1885

PERIOD COVERED:  0000Z (UTC) 05/23/97 - 0000Z (UTC) 05/27/97

Daily Status Report as of 147/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

   1.1 Completed Two Sets of WF/PC-2 6363 (The Environments and Host
Galaxies of BL-Lac Objects)

       The WF/PC-2 was used to make snapshot survey observations of BL-Lac
objects MS1407.9+5 and MS1443.5+6 in order to study their environment and
their host galaxies.  The goal is to investigate systematic trends in host
galaxy type, unusual morphological features, nearby companion galaxies,
etc.  During the second iteration of this proposal, at 143/121713Z, the
guide star acquisition failed.  Three observation were affected.  HSTAR
6076 was written.  Otherwise, the observations were executed as scheduled,
and no further anomalies were noted.

   1.2 Completed Seven Sets of WF/PC-2 6904 (WF/PC-2 Cycle 6 Calibration:
Darks)

       The WF/PC-2 was used to make a series of several dark calibration
images as part of a standard calibration within Cycle 6.  This calibration
procedure is performed once per week as part of an on going CCD calibration
to be used to monitor and characterize hot pixels.  The observations were
executed as scheduled, and no anomalies were noted.

   1.3 Completed Two Sets of STIS/CCD/MA1/MA2 7096 (STIS MAMA Sensitivity
on Axis)

       The Space Telescope Imaging Spectrograph (CCD/MA1/MA2) were used to
make observations of BD+75D325 and GD153 in order to measure STIS
sensitivity as a function of wavelength near the center of the detector for
all spectroscopic modes, and check transmissions of all filters and
filtered slits.  The observations were executed as scheduled, and no
anomalies were noted.

   1.4 Completed Fourteen Sets of WF/PC-2 7553 (Pure Parallel Archive
Survey II)

       WF/PC-2 parallel observations were obtained in the ultraviolet in
search for interesting objects.  This program is designed to find
extragalactic sources with near ultraviolet excesses (3000 A0) outside the
galactic plane and far ultraviolet sources (1600 A0) in the galactic plane.
The procedure was executed as scheduled, and no anomalies were reported.

   1.5 Completed Eleven Sets of NIC/1/2/3 7048 (NICMOS Parallel Thermal
Background Test)

       The Near Infrared Cameras (Cameras One, Two and Three) were used to
make observations of an object designated as Target-1 in order execute
measurements of the stability of the HST thermal emissions.  The
observations were executed as scheduled, and no problems were reported.

  1.6 Completed STIS/MA1/MA2 7064 (STIS SMOV MAMA Contamination Monitor)

       The Space Telescope Infrared Spectrograph (MA1/MA2) was used to make
observations of the flux from standard star GRW70D582 in order to monitor
for any gross changes over time that might indicate contamination.  The
observations were completed as planned, and no anomalies were reported.

   1.7 Completed Two Sets of NIC/1/2/3 7043 (NICMOS Focus Monitor)

       The Near Infrared Cameras (Cameras Ine, Two and Three) were used to
make observations of NGC-3603 in order to make focus calibration and
monitoring measurements.  This proposal is built to run NIC/1/2 focus
sweeps on a weekly basis, and NIC/3 focus sweeps twice a week during SMOV.
The observations were executed as scheduled, and no anomalies were noted.

   1.8 Completed NIC/2 7154 (NICMOS Coronographic Hole Monitor)

       The Near Imaging Camera (NIC Two) was used to make observations of
object NGC-3606 in order to monitor the effects of coronagrapghic hole.
The purpose of this proposal is to take lamp flats with camera Two (and
cameras One and Three occasionally) to monitor the location of the
coronographic spot.  The observations were completed as scheduled, and no
anomalies were reported.

   1.9 Completed WF/PC-2 7590 (Cosmological Parameters Omega and Lambda
>From High-Redshift Type IA Supernovae)

       The WF/PC-2 was used to make observations of type 1A supernova
SN9784 in order to study its redshift.  The HST was used to make direct
measurements of the cosmological parameters Omega, Lambda, and curvature
(Omega_k) using Type 1A supernovae (SNe 1a) as a calibrated "standard
candle".  The observations were executed as scheduled, and no anomalies
were noted.

   1.10 Completed Three Sets of WF/PC-2 7588 (Measuring Q0 With Type IA
Supernovae)

       The WF/PC-2 was used to make observations of supernova SN1997A4 in
order to measure the Q0 parameter.  This is in order to produce a precise
Hubble diagram which can be used to measure the cosmic deceleration and
global curvature of the universe.  HST can make an essential contribution
by providing photometry with substantially higher precision and better
temporal coverage than can be obtained from the ground.  The observations
were executed as scheduled, and no anomalies were noted.

   1.11 Completed NIC/1/2/3 7152 (NICMOS Absolute Photometry Test)

       The Near Infrared Camera (Camera One) was used to conduct an
absolute photometric calibration test.  A dark calibration image was also
taken.  The observations were completed as scheduled, and no anomalies were
reported.

   1.12 Completed STIS/CCD 7076 (STIS Corrector Alignment, Fine)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of BPM16274 as part of a fine correction alignment and
calibration procedure.  This is to refine the STIS corrector system in
alignment so that the image quality at the spectrographs slit plane is
optimized.  The observations were executed as scheduled, and no anomalies
were noted.

   1.13 Completed FGS 6566 (Calibrating the Mass-Luminosity Relation at the
End of the Main Sequence)

       The FGSs were used to make astrometric observations of the
components of the low-mass, binary system, star GL748 in order to make a
calibrations of the mass-luminosity relation at the end of the main
sequence.  The individual stars have masses of less than 0.2 solar masses.
The observations were completed as scheduled, and no problems were noted.

   1.14 Completed FOC/48 6199 (Cycle 5: f/48 Long Slit Spectrograph
Wavelength Calibration)

       The Faint Object Camera (f/48) was used to make wavelength
calibration observations of the long slit spectrograph.  This was done by
taking extended line emission observations of the source M2-9.  The
observations were completed as planned, and no problems were reported.

   1.15 Completed STIS/CCD 7123 (MAMA and CCD Spectroscopy of SN1987A)

       The Space Telescope Imaging Spectrograph (MAMA/CCD) was used to make
observations of the super-nova remnant LMC-SN1987 which is located in the
Large Magellanic Cloud.  This is to study SN-1987A and its nebula by taking
spectra at both ultraviolet and optical wavelengths to obtain a spatially
resolved map of the debris and the circumstellar rings.  A waveline
calibration image was also taken.  The observations were completed as
planned, and no anomalies were reported.

   1.16 Completed STIS/CCD 7079 (STIS19C - Camera Mode Image Quality - CCD)

       The Space Telescope Imaging Camera (CCD) was used to make
observations of the globular clusters Omega Cen and FEIGE-34 in order to
determine the form of the instrumental point spread function as a function
of wavelength and position on the detector.  The observations will also
help determine the geometric distortion of the image.  The observations
were completed as scheduled, and no anomalies were noted.

   1.17 Completed FGS 6884 (Companion to W922)

       The FGSs were used to make astrometric parallax observations of the
binary star W922 in order to study its faint companion star.  These data
will be used to measure the barycentric orbits, and accurate masses of this
star and its low mass companion.  Astrometric observations were also made
of several other nearby reference stars.  The observations were completed
as scheduled, and no problems were reported.

   1.18 Completed Two Sets of NIC/1/3 7040 (NICMOS Plate Scale and
Astrometric Calibration)

       The Near Infrared Camera (Camera Two) was used to make observations
of cluster NGC-1850 as part of a plate scale and astrometric calibration.
The observations were executed as scheduled, and no problems were reported.

   1.19 Completed WF/PC-2 6357 (The Nuclear Morphology of Elliptical Galaxies)

       The WF/PC-2 was used to make images of the early type, large,
elliptical galaxy NGC-4121 (taken from a list of 150 galaxies) in order to
study its nuclear morphology.  This survey will complement Illingworth's
snapshot study of later Hubble types.  The observations were completed as
scheduled, and no anomalies were reported.

   1.20 Completed STIS/CCD 7121 (Imaging Spectroscopy of NGC-4151)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of NGC-4151 which is the brightest Seyfert 1 galaxy and thus a
perfect target to demonstrate the imaging spectroscopic capabilities of
STIS.  A wavelength calibration image was also taken.  The observations
were executed as scheduled, and no anomalies were noted.

   1.21 Completed WF/PC-2 6587 (Black Holes and Cores of Early-Type Galaxies)

       The WF/PC-2 was used to make observations of early-type galaxy
NGC-3706 in order to study its nuclear core region and its possible black
hole.  The campaign to find black holes in the centers of galaxies using
HST has so far been highly successful.  The observations were completed as
planned, and no problems were reported.

   1.22 Completed WF/PC-2 6770 (Resolving the Nature of Nova Shells)

       The WF/PC-2 was used to make images of the post-nova remnant HR-Her
in order to study its surrounding shells structure.  Past data has
indicated a strong correlation between nova speed class and the ellipticity
of the resulting remnants.  The observations were completed as scheduled,
and no problems were noted.

   1.23 Completed WF/PC-2 6887 (A Photometric Search for Faint Companions
to Nearby Stars)

       The WF/PC-2 was used to make a photometric search observations of
the nearby star HD1326 in order to look for possible companions.  The
technique involves use of the Planetary Camera with wide band pass filters
to photometrically measure for the presence of resolved dark companions.
The observations were executed as scheduled, and no anomalies were noted.

   1.24 Completed NIC/1/2/3 7050 (NICMOS Differential Photometry Test)

       The Near Infrared Cameras (NIC Cameras One, Two and Three) were used
to make observations of standard test star P330E as part of a differential
photometric test.  This is a inter-camera photometric precision and
stability test, obtained from observations of the standard star at 25
positions, in each camera.  The observations were executed as scheduled,
and no anomalies were noted.

   1.25 Completed Five Sets of WF/PC-2 7553 (Pure Parallel Archive Survey II)

       WF/PC-2 parallel observations were obtained in the ultraviolet in a
search for interesting objects.  This program is designed to find
extragalactic sources with near ultraviolet excesses (3000 A0) outside the
galactic plane and far ultraviolet sources (1600 A0) in the galactic plane.
The procedure was executed as scheduled, and no anomalies were reported.

   1.26 Completed Two Sets of STIS/CCD 7138 (Imaging and Spectroscopy of
the Bright Arcs Around the Most Luminous X-Ray Cluster RXJ 1347.5-1145)

       The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the arcs surrounding the cluster RXJ 1347.5-1145 which is
the brightest know X-ray cluster.  The cluster itself is at a redshift of
0.451 and there are two bright arcs symmetrically situated at about 35
arcseconds from the brightest cluster member.  The observations were
completed as planned and no problems were reported.

   1.27 Completed WF/PC-2 6909 (WF/PC-2 Cycle 6 Calibration: Earth Flats

       The WF/PC-2 was used to make observations of the bright Earth to
obtain streak flats which are used to construct high quality flat fields
for the WF/PC-2 filter set.  The observations were executed as scheduled,
and no anomalies were noted.

   1.28 Completed WF/PC-2 6905 (WF/PC-2 Cycle 6 Calibration: Internal Monitor)

       The WF/PC-2 was used to make several internal calibrations
observations including biases and internal flats as part of a Cycle 6
calibrations procedure.  A variety of internal exposures are run weekly to
verify and monitor the health of the camera.  The observations were
executed as scheduled, and no anomalies were noted.

   1.29 Completed Two Sets of STIS/CCD 7092 (CCD Dark Rate and Read Noise)

       Observations were taken to measure CCD dark current and gather data
for making super darks.  The observations were completed as planned, and no
anomalies were reported.

   1.30 Completed STIS/DUM/MA1/MA2 7080 (STIS19M - Camera Mode Image
Quality - MAMA)

       The Space Telescope Imaging Spectrograph (DUM/MA1/MA2) was used to
make observations of NGC-6681 in order to determine the camera mode's image
quality, and to determine the form of the instrumental Point Spread
Function (PSF) for the MAMA detectors as a function of wavelength and
position.  The observations were completed as scheduled, and no anomalies
were reported.

   1.31 Completed Two Sets of WF/PC-2 6802 (Cosmology with The Medium Deep
Survey)

       The WF/PC-2 was used to make observations in parallel with the prime
science observations as part of the Medium Deep Survey.  These parallel MDS
exposures have provided unique high resolution images which clearly
supplement the primary HST surveys.  The observation were executed as
scheduled, and no anomalies were noted

   1.32 Completed Four Sets of WF/PC-2 6802 (Cosmology with The Medium Deep
Survey)

       The WF/PC-2 was used to make observations in parallel with the prime
science observations as part of the Medium Deep Survey.  These parallel MDS
exposures have provided unique high resolution images which clearly
supplement the primary HST surveys.  The observation were executed as
scheduled, and no anomalies were noted

   1.33 Completed STIS/CCD 7133 (STIS to FGS Alignment, PART 2)

       The Space Telescope Imaging Spectrograph (CCD) was used to check the
systems alignment with the FGS by making observations of cluster NGC-188.
This is to determine the transformation of the STIS CCD detector reference
frame to the FGS reference frame following corrector alignment.  The
observations were completed as planned, and no anomalies were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

                            Scheduled Acquisitions : 28
                                        Successful : 27

       The failure is detailed in 1.1.

                          Scheduled Reacquisitions : 31
                                        Successful : 31

   2.2 FHST Updates:

                              Scheduled : 71
                             Successful : 71

   2.3 Operations Notes:

       The observations detailed in 1.15, 1.20, and 1.26 were all STIS
Early Release Observation (ERO) proposals.

       SSR interrupt log dumps were performed at 143/0036Z, 145/0049Z, and
146/2311Z.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

       Continuation of normal science and SMOV operations.

/DMH