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HUBBLE SPACE TELESCOPE

DAILY REPORT #2002

PERIOD COVERED: 0000Z (UTC) 11/10/97 - 0000Z (UTC) 11/12/97

Daily Status Report as of 316/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed Two Sets of STIS/CCD 7802 (Daily Darks to Update
Acquisition Bad Pixel Table)

The Space Telescope Imaging Spectrograph (CCD) was used to make
calibration observations to obtain daily darks to update the acquisition
bad pixel table. These 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
executed as scheduled, and no anomalies were noted.

1.2 Completed WF/PC-2 7618 (WF/PC-2 Cycle 7 Photometric Monitor UV/OPT STD)

The WF/PC-2 was used to make observations of the standard star
GRW+70D582 as part of a Cycle 7 photometric monitoring program. This
ultraviolet spectrophotometric standard star was observed in a variety of
filters and cameras to monitor the photometric stability and quantum
efficiency of WF/PC-2 from the far-ultraviolet to near-infrared. The
observations were completed as scheduled, and no problems were reported.

1.3 Completed STIS/CCD 7711 (STIS CCD G750L Fringing Flats.)

The Space Telescope Imaging Spectrograph (CCD) was used to
investigate and monitor the STIS CCD flat-field fringing in the G750L
grating at its nominal wavelength setting {7751A}. WAVECALs were also
taken at the same gain and wavelength setting. Typical S/N = 100 for each
integration, and gain = 4 on each. The observations were executed as
scheduled, and no anomalies were noted.

1.4 Completed Four Sets of WF/PC-2 7621 (WF/PC-2 Cycle 7 Supplemental
Darks PT1/3)

The WF/PC-2 was used to make supplemental dark calibration images.
This set of calibrations is intended to obtain 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.

1.5 Completed Four Sets of NIC/2 7219 (Ultraluminous Infrared Galaxies)

The Near Infrared Camera (Camera Two) was used to make observations
of the ultraluminous infrared galaxies NGC-7469 and NGC-6090. These
galaxies are probably powered by nuclear starbursts and/or central AGNs;
many of these systems exhibit evidence of recent galactic interaction or
merging. The observations were completed as planned, and no problems were
reported.

1.6 Completed Six Sets of WF/PC-2 7620 (WF/PC-2 Cycle 7 Standard Darks)

The WF/PC-2 was used to make a series of Cycle 7 standard dark
calibration images. This dark calibration program obtains dark frames
every week in order to provide data for the ongoing calibration of the CCD
dark current rate, and to monitor and characterize the evolution of hot
pixels. The observations were executed as scheduled, and no anomalies were
noted.

1.7 Completed FGS 6641 (Continuation of Mass Ratio Determination for
Double Stars)

The Fine Guidance Sensors were used in both the POS and TRANS modes
to make astrometric observations of the double star L722-22 in order to
determine the mass ratio of its two components. This binary system
contains either a low-mass star or a brown dwarf. The observations were
executed as scheduled, and no anomalies were noted.

1.8 Completed STIS/CC 7782 (STIS Non-Scripted Parallel Archive Proposal
- Half Orbit)

The Space Telescope Imaging Spectrograph (CCD) was used for a
non-scripted parallel archive proposal (one-half orbit). The observations
were executed as scheduled, and no anomalies were noted.

1.9 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 HD2025660. This
star is known to be within 10 parsecs of the Sun. The observations were
executed as scheduled, and no anomalies were noted.

1.10 Completed WF/PC-2 6559 (An Imaging Study of Asteroids)

The WF/PC-2 was used to make multi-color observations of the main
belt asteroid 89-Julia which reached perigee during Cycle 6. The images
will be searched for companions. The observations were executed as
scheduled, and no anomalies were noted.

1.11 Completed STIS/MA1/MA2 7657 (STIS Spectroscopic and Imaging
Sensitivity, MAMA)

The Space Telescope Imaging Spectrograph (MA1 and MA2) was used to
make observations of GD71 in order to study the spectroscopic and imaging
sensitivity. Sensitivity measurements are done for all primary tilts of
the gratings and the prism used with the MAMAs, except for the G140L and
G230L gratings. Imaging sensitivity measurements are done with all
apertures, including a neutral density filter. A wavelength and a dark
calibration images were also taken. The observations were executed as
scheduled, and no anomalies were noted.

1.12 Completed Seven Sets of NIC/2/3 7811 (NICMOS modified one orbit
parallel)

The Near Infrared Camera (Cameras Two and Three) was used to obtains
JH imaging, G096 and G141 spectroscopy of sky regions when another
instrument is prime. The observations were completed as planned, and no
anomalies were reported.

1.13 Completed Five Sets of WF/PC-2 7625 (WF/PC-2 Cycle 7 Earth Flats)

The WF/PC-2 was used to make a series of Earth flat calibration
images. These flat fields will allow mapping of the OTA illumination
pattern and will be used in conjunction with previous internal and external
flats to generate new pipeline superflats. The observations were completed
as planned, and no anomalies were reported.

1.14 Completed Two Sets of STIS/MA2 7604 (Cycle 7 MAMA Dark Measurements)

The Space Telescope Imaging Spectrograph (MA2) was used to make MAMA
dark measurements. These darks will be used in later image reductions and
also trended over the instrument's life time as an indicator of the
detector's degradation or damage. The observations were completed as
scheduled, and no problems were reported.

1.15 Completed WF/PC-2 6935 (WF/PC-2 Cycle: Photometric Transformation)

The WF/PC-2 was used to make observations of object NGC-2682 in
order to perform photometric transformations. This is a series of
observations that will be used to extend the WF/PC-2 photometric
transformation to include the Stromger and Johnson-Cousins systems. Near
the beginning of this proposal, the loss of lock mentioned in 2.1 occurred.
Otherwise, the observations were completed as planned and no further
problems were reported.

1.16 Completed WF/PC-2 7385 (Low-mass Halo Binaries)

The WF/PC-2 was used to make observations of the low mass, halo,
binary, {Population II}, M-type, sub-dwarf, star LHS169. This star is too
faint to be resolved through ground-based speckle interferometry, thus HST
represents the only means of probing separations. The observations were
completed as planned, and no anomalies were reported.

1.17 Completed WF/PC-2 7377 (Dwarf Elliptical Galaxy Snapshot Survey II)

The WF/PC-2 was used to make observations of the dwarf elliptical
galaxy LHS169 as part of Snapshot Survey II. This survey will provide
important information on the globular cluster systems of such galaxies and
the properties of their cores and nuclei. The observations were completed
as planned, and no anomalies were reported.

1.18 Completed NIC/2 7331 (Near-IR Properties of the Bulges of Spiral
Galaxies)

The Near Infrared Camera (Camera Two) was used to make infrared
observations of the bulge in spiral galaxy NGC-4565. Near-IR data at HST
resolution are essential for correcting for the effect of dust and will
enable us to derive robust nuclear properties for the sample. The
observations were executed as scheduled, and no anomalies were noted.

1.19 Completed NIC/1/3/WF/PC-2 7419 (The Low Mass Stellar Luminosity
Function in Dwarf Spheroidal Galaxies)

The Near Infrared Camera (Cameras One and Three) and the WF/PC-2
were used to study of the low mass stellar luminocity function in the dwarf
galaxy NGC-104. This class of dSph satellite galaxies of the Milky Way
provide the nearest, and best studied, examples of dark-matter dominated
systems. They have stellar velocity dispersions well in excess of those
consistent with their mass being predominantly in a stellar mass function
at all like that of the solar neighborhood, or of the galactic globular
clusters. The observations were completed as planned, and no problems were
reported.

1.20 Completed STIS/CCD 7666 (CCD Linearity and Shutter Stability)

The Space Telescope Imaging Spectrograph (CCD) was used to make some
CCD linearity and shutter stability calibration checks. CCDs can suffer
from non-linearities at low, high {or both} intensity. Such effects can be
subtle, but are an important contributor to error budgets for routine
science observations and are sometimes recognized only after limitations
are detected in careful analyses of science data. The observations were
completed as scheduled, and no anomalies were noted.

1.21 Completed Three Sets of NIC/2 7498 (NICMOS Imaging Survey of
Distant Radio Galaxies. Ellipticals at Z > 2 ?)

The Near Infrared Camera (Camera Two) was used to make high
resolution and high signal-to-noise ratio imaging survey observations of
the radio galaxy MRC2224-27. The existence and photometric properties of
massive elliptical galaxies at high redshift provide a powerful probe of
galaxy evolution. The observations were executed as scheduled, and no
anomalies were noted.

1.22 Completed Seven Sets of WF/PC-2 7786 (Pure Parallel Archive Survey
- Continuation)

The WF/PC-2 was used to make observations as part of an archival
survey program in which the images were taken in parallel with the prime
science observations. These WF/PC-2 parallel observations were obtained in
the ultraviolet in a search for interesting objects. The observations were
completed as planned, and no problems were reported.

1.23 Completed Three Sets of STIS/CCD 7783 (STIS Parallel Science)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations taken in parallel with the prime science. The observations
were completed, and no problems were reported.

1.24 Completed NIC/1/2/3 7268 (Nuclear Brightness Profiles of Merger
Remnants; Do Mergers Form Ellipticals?)

The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of the elliptical galaxy NGC-7525. Many elliptical
galaxies might have formed from mergers of disk galaxies. Numerical
simulations yield elliptical-like remnants and observed merger remnants
have R^1/4 surface brightness profiles. However, while the global
properties of merger remnants and ellipticals are similar, it is unknown
whether this is true for their nuclear properties as well. The
observations were executed as scheduled, and no anomalies were noted.

1.25 Completed FGS 7487 (Orbits of Pre-Main Sequence Binaries)

The Fine Guidance Sensors were used to make astrometric observations
of the pre-main-sequence, binary star Elias-12 in order to determine its
orbital elements. This is important because there are still no low mass
young stars with reliably known masses. The observations were executed as
scheduled, and no anomalies were noted.

1.26 Completed STIS/CCD 7781 (STIS Non-Scripted Parallel Archive
Proposal - Full Orbit)

The Space Telescope Imaging Spectrograph (CCD) was used for a
non-scripted parallel archive proposal (one full orbit). The observations
were executed as scheduled, and no anomalies were noted.

1.27 Completed STIS/CCD 7313 (Systematic Investigation of Comet Hale-Bopp)

The Space Telescope Imaging Spectrograph (CCD) was used in the
continued systematic investigation of Comet Hale-Bopp}. Emissions from OH,
CS, and the CO Cameron system were monitored, which allows comparison with
the heliocentric variation in the production rates of water, CS2, and CO2
(or possibly CO, if electron impact on CO dominates the excitation of the
Cameron bands). The observations were executed as scheduled, and no
problems were reported.

1.28 Completed NIC/2 7413 (The Dusty Environments of Protostars)

The Near infrared Camera (Camera Two) was used to make observational
images of the dusty environment around protostar IRAS04325. These
observations will address physical conditions in protostellar envelopes and
provide deeper insight into star and protoplanetary disk formation. The
observations were completed as planned, and no problems were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 20
Successful : 20
Scheduled Reacquisitions : 10
Successful : 10

There was a loss of lock at 314/213149Z that lasted for one minute
and two seconds, affecting the proposal described in 1.15. HSTAR 6238 was
written.

2.2 FHST Updates:

Scheduled : 45
Successful : 45

2.3 Operations Notes:

The SSR interrupt log was dumped at 314/1348Z.

HST operations transferred to the SAMS backup facility at 315/0915Z
and remained there until 315/2204Z. There were no problems. In addition
to verifying SAMS capabilities, the move enabled LAN work in the MOR area
to proceed.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/DMH