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HUBBLE SPACE TELESCOPE

DAILY REPORT #2298

PERIOD COVERED: 0000Z (UTC) 01/29/99 - 0000Z (UTC) 02/01/99

Daily Status Report as of 032/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed Four Sets of STIS/CCD 7948 (CCD Dark and Bias Monitor --
Cont. to Dec. 98)

The Space Telescope Imaging Spectrograph (CCD) was used 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. The data will be used 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 Eight Sets of WF/PC-2 7713 (WF/P-2 Cycle 7 Supplemental
Darks pt3/3)

The WF/PC-2 was used to make supplemental dark calibration images.
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 completed as planned, and no anomalies were noted.

1.3 Completed Three 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
3C47.0, 3C65.0 and 3C208.0. 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 Fifteen Sets of STIS/CCD 8091 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation)

The Space Telescope Imaging Spectrograph (CCD) was used to make high
galactic latitude, non-scripted, parallel observations. The observations
were completed as planned, and no anomalies were noted.

1.5 Completed STIS/CCD 7768 (GK-Per - Nova 1901)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of Nova 1901 (a.k.a., GK-Perseus) in order to obtain optical
spectra of a number of knots in the nova's shell. A wavelength calibration
image was also taken. The observations were executed as scheduled, and no
anomalies were noted.

1.6 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 acquisition default to fine lock
backup, documented in 2.1 and HSTAR 69959, occurred at the beginning of the
final iteration of this proposal, possibly affecting four observations.
Otherwise, the observations were executed as scheduled, and no further
anomalies were noted.

1.7 Completed WF/PC-2 6346 (Snapshot Survey of the Ultraluminous IRAS
Galaxy Sample-Part 1 High)

The WF/PC-2 was used to make snapshot survey observations of the
ultraluminous IRAS galaxy QDOTULIR23. These data will be searched for
multiple cores, which imply a merger has occurred, and for starburst
regions. The observations were executed as scheduled, and no anomalies
were noted.

1.8 Completed STIS/CCD/MA2 7475 (The Chemical Content of the Universe at
Z< 1.6)

The Space Telescope Imaging Spectrograph (CCD and MA2) was used to
make observations of the background quasar Q1328+3045. Damped Lyman-Alpha
absorption systems provide a means of directly probing the chemical content
of the deep universe. A wavelength calibration image was also taken. The
observations were completed as planned, and no problems were reported.

1.9 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-5557 (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.

1.10 Completed WF/PC-2 6633 (Cusps or Cores in Barred Bulges?)

The WF/PC-2 was used to make observations of the SB class (Barred)
galaxy NGC-2787 in order to study its nuclear bulge region and cusps. This
is a highly tri-axial, tumbling, low-mass stellar systems. The
observations were completed as planned, and no problems were reported.

1.11 Completed Two Sets of STIS/CCD 8084 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal Continuation)

The Space Telescope Imaging Spectrograph (CCD) was used to make
non-scripted parallel high galactic latitude observations as part of POMS
test proposal. The observations were executed as scheduled, and no
anomalies were noted.

1.12 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.

1.13 Completed Two Sets of STIS/CCD 8080 (STIS Spectroscopic CCD
Flatfielding -- Revised)

The Space Telescope Imaging Spectrograph (CCD) was used to make CCD
flat fielding calibration observations in the spectroscopic mode. The
observations were completed as planned, and no anomalies were reported.

1.14 Completed WF/PC-2 6651 (WLR Distances from Accurate Multi-Color
WF/PC-2 Photometry of A & B Supergiants in M-31 and M-33)

The WF/PC-2 was used to make multi-color photometric observations of
NGC-224-44 (a.k.a., M-31). This is to study A and B supergiant stars in
M-31 and M-33 with a precision far exceeding that of existing ground-based
estimates. The observations were completed as planned, and no problems
were reported.

1.15 Completed STIS/CCD 7912 (STIS Parallel Archive Proposal - Nearby
Galaxies - Imaging and Spectroscopy)

The Space Telescope Imaging Spectrograph (CCD) was used to make
parallel observations of nearby galaxies. This survey will be useful to
study the star formation histories, chemical evolution, and distances to
these galaxies. These data will be placed immediately into the Hubble Data
Archive. The observations were completed as scheduled, and no problems
were reported.

1.16 Completed FOC/96 7923 (FOC F/96 Turnon)

The Faint Object Camera (f/96) was used to take an internal flat and
a dark to ensure that the 30-day limit for the FOC is not exceeded. The
observations were executed as scheduled, and no anomalies were noted.

1.17 Completed WF/PC-2 7739 (Star Formation in the Prototype Super Star
Cluster R136)

The WF/PC-2 was used to study the star formation in the prototype
super star cluster HER-14739. Similarly extreme objects have now been
recognized in more distant galaxies, and may in fact be the young analogs
of globular clusters. Several offset images and a wave length calibration
image were also taken. The observations were completed as planned, and no
anomalies were reported.

1.18 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 VCC607 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.

1.19 Completed 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-1732 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.

1.20 Completed STIS/CCD/MA1/MA2 7653 (LSF Measure of the
MAMA-Spectroscopic Modes)

The Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) was used
to make observations of HD28497 to measure the LSF of MAMA spectroscopic
modes with an external target. A wavelength calibration image was also
taken. The observations were completed as planned, and no anomalies were
reported.

1.21 Completed WF/PC-2 6583 (The Origin of the Alignment Effect: WF/PC-2
Imaging Polarimetry of High Redshift Radio Galaxies)

The WF/PC-2 was used to make imaging polarimetry observations of the
high redshifted galaxy 3C266. These polarimetric observations are crucial
to the understanding of the spectacular morphologies recently discovered in
high redshift radio galaxies by HST, and to the investigation of
morphological and evolutionary links between radio galaxies and quasars.
The observation were completed as scheduled, and no anomalies were
reported.

1.22 Completed STIS/CCD 8028 (STIS GTO Observations)

The Space Telescope Imaging Spectrograph (CCD) was used to make GTO
of stars in galaxy NGC-3395. The solar blind and long slit capabilities of
STIS were used to investigate the population of hot stars in this galaxy.
A wavelength calibration image was also taken. The observations were
completed as planned, and no problems were reported.

1.23 Completed WF/PC-2 6738 (Super Star Clusters and H II Regions in
Nuclear Rings)

The WF/PC-2 was used to make observations of the super star clusters
and the H-II regions in the nuclear ring in galaxy NGC-5248. Together with
our ultraviolet data, new WF/PC-2 images will enable us to determine the
H-II region and cluster luminosity functions within nuclear rings, measure
cluster radii, derive age and mass estimates for the clusters by comparison
with evolutionary synthesis models, and study the structure and evolution
of nuclear rings. The observations were completed as scheduled, and no
anomalies were reported.

1.24 Completed Two Sets of STIS/CCD 7650 (STIS Yearly CCD Wavelength
Monitor)

The Space Telescope Imaging Spectrograph (CCD) was used to perform
its yearly wavelength calibration monitoring program. Wavelength
dispersion solutions will be determined on a yearly basis as part of a
long-term monitoring program. The observations were completed as planned,
and no anomalies were reported.

1.25 Completed WF/PC-2 6673 (Black Holes and Gas Disks in a Complete
Sample of Radio Loud UGC Ellipticals)

The WF/PC-2 was used to make observations of radio load, elliptical
galaxy UGC-01841in order to search for possible black holes and gas disks.
Hydrogen-Alpha and broad band observations were taken to determine the
luminosity profiles and stellar populations (on the tens of parsec scale),
and detect nuclear regions or disks of gas and dust. The observations were
completed as planned, and no anomalies were reported.

1.26 Completed Two Sets of WF/PC-2 7386 (A Snapshot Survey of Nova Shells)

The WF/PC-2 was used to make observational images of the super nova
shell NOVA-OPH-1 in order to detect and measure its expanding gaseous
shell. These observations will trace the distribution of hot and cool gas
in the nova shells, and show their degree of inhomogeneity on both large
and small scales. The observations were completed as scheduled, and no
problems were noted.

1.27 Completed STIS/CCD 7403 (Measuring Black Hole Masses in Broad-Lined
AGNs)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of broad-lined active galactic nuclei (AGN) located in galaxy
NGC-3227. Broad emission lines in AGNs are considered one of the most
direct signatures of a large central mass, which is presumed to be a black
hole. A wavelength calibration image was also taken. The observations
were completed as planned, and no anomalies were reported.

1.28 Completed STIS/CCD 7361 (The Nature of Nuclear Activity in Nearby
Galaxies)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of the nuclear region of galaxy N4450. The high resolution
spectra will be used to search for broad components in H-Alpha and for
velocity gradients, indicative of gas rotation or other ordered motions. A
wavelength calibration image was also taken. The acquisition default to
fine lock backup, documented in 2.1 and HSTAR 69959, occurred at the
beginning of this proposal, possibly affecting three observations.
Otherwise, the observations were executed as scheduled, and no further
anomalies were noted.

1.29 Completed STIS/CCD/WF/PC-2 7568 (Spectroscopy of 3C Radio Galaxy
Optical Jets)

The Space Telescope Imaging Spectrograph (CCD) and the WF/PC-2 were
all used to make observations of the optical jets coming off of the radio
galaxy 3C273. These data will be used to determine the nature of the
phenomena: whether synchrotron jet radiation, entrained gas, ionized clouds
or star-formation. These data will also be used to study the inner
populations and dynamics of the galaxies. The observations were completed
as scheduled, and no problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 24
Successful : 24

The acquisition at 031/163741Z defaulted to fine lock backup on
FGS-3 only. HSTAR 6959 was written. The proposals described in 1.6 and
1.28 may have been affected.

Scheduled Reacquisitions : 21
Successful : 21

2.2 FHST Updates:

Scheduled : 67
Successful : 68

The roll delay update at 029/193201Z failed. HSTAR 6956 was written.

2.3 Operations Notes:

The return to a four-gyro configuration was cancelled when the
gyro-3 drift rate bias stability had not settled within the specified
specification limit of 0.003 arcsec/sec over a three hour period.
Investigation of gyro-6 data of its stabilization pattern after its first
flexhead failure showed similar problems, that settled out within one day.
PCS engineers recommended postponing the return to a four-gyro
configuration to a later time.

ROP IC-2 was used once to turn SSA-1 on and off.

Using ROP SR-1, the SSR EDAC error counter was cleared seven times.

A TTR was written for a late acquisition at 029/1515Z due to weather
conditions which caused data drop-outs. Four minutes of 32k engineering
data was lost.

Per HSTAR 6954, the STIS MCE-2 reset at 029/163609Z while the low
voltage was on. The STIS flight software error counter was reset at
029/1706Z per ROP NS-12. Recovery of the MAMA-2 was accomplished via SMA
commanding at 030/073900Z, the next time the high voltage was turned on.

A TTR was written for data inversions on day 030.

Four minutes of 32k engineering data was lost, beginning at
030/2327Z. The data was unrecoverable.

At the support beginning at 031/0112Z, there was a late acquisition
and a loss of lock caused by an antenna controller problem at TDW.
Nineteen minutes of 32k data was lost, all but two of which was recoverable.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/DMH