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HUBBLE SPACE TELESCOPE

DAILY REPORT #2169

PERIOD COVERED: 0000Z (UTC) 07/20/98 - 0000Z (UTC) 07/21/98

Daily Status Report as of 202/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed FOC/96/WF/PC-2 7274 (Secular Changes in the Jet of M-87)

The Faint Object Camera (f/96) and the WF/PC-2 were both used to
make observations of the secular changes in the jet coming off of the
active galactic nuclei of galaxy M-87. Past observations with the FOC have
shown changes as small as 0.03", and provide a unique opportunity to study
proper motions and structural changes of the jet. An internal flat
calibration image was also taken. The observations were completed as
scheduled, and no anomalies were reported.

1.2 Completed NIC/2/3 7907 (NICMOS Pure Parallel Winter 97-98)

The Near Infrared Camera (Cameras Two and Three) was used to make
pure parallel spectrographic observations of sky regions when another
instrument is prime. The observations were completed as planned, and no
anomalies were reported.

1.3 Completed Three 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.

1.4 Completed NIC/2 7887 (A Survey of Gravitational Lenses as
Cosmological Tools II)

The Near Infrared Camera (Camera Two) was used to make observations
of the gravitational lens candidate system SBS1520+53. The propose is to
extend our IR survey of gravitational lenses and gravitational lens
candidates by obtaining NICMOS images of 14 additional lens systems or
candidates. The observations were executed as scheduled, and no anomalies
were noted.

1.5 Completed Two Sets of STIS/CCD 8064 (POMS Test Proposal: STIS
Non-Scripted Parallel Proposal - Backup)

The Space Telescope Imaging Spectrograph (CCD) was used to conduct a
non-scripted parallel POMS test. The observations were completed as
scheduled, and no problems were reported.

1.6 Completed Two Sets of WF/PC-2 7909 (POMS Test Proposal: WF II
Parallel Archive Proposal)

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

1.7 Completed Two 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.

1.8 Completed Two Sets of WF/PC-2 8061 (POMS Test Proposal: WF-II Backup
Parallel Archive Proposal)

This is a POMS test proposal designed to simulate scientific plans.
The proposal was executed as planned, and no anomalies were reported.

1.9 Completed NIC/1/2 7329 (The Nature of the Damped LyAlpha Absorbers
-- A New Study of Young Galaxies)

The Near Infrared Camera (Cameras One and Two) was used to make
observations of the young galaxy Q1759+7539 in order to study the nature of
its damped Lyman-Alpha Absorbers (DLAS). The damped Lyman-Alpha absorption
line systems, occasionally found in quasar spectra, provide one of only a
few practical methods of detecting and studying significant numbers of
galaxies at high redshifts. The observations were executed as scheduled,
and no anomalies were noted.

1.10 Completed NIC/2/STIS/CCD/WF/PC-2 7220 (Imaging of Quasar Host Galaxies)

The Near Infrared Camera (Camera Two), the Space Telescope Imaging
Spectrograph (CCD), and the WF/PC-2 were used to make direct imaging
observations of the host galaxy for the broad absorption line quasar
PG1700+518. The observations were completed as planned, and no anomalies
were reported.

1.11 Completed 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 V1974-Cyg 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.

1.12 Completed NIC/1/2 7285 (Collimation of Astrophysical Jets: The
Proto-Planetary Nebula He 3-1475)

The Faint Object Camera (f/96) was used to make observations of
proto-planetary nebula HE-1475 in order to get a collimation of its
astrophysical jets. Recent observations of this proto-planetary nebula in
the N II Lambda 6584 A0 line with the HST WF/PC-2 have revealed what appear
the be large scale flows being collimated into narrow bipolar jets. The
observations were completed as scheduled, and no anomalies were reported.

1.13 Completed NIC/1/2/3 7824 (Deep NIC Images of 20 High-Z Damped
Ly-Alpha Galaxies)

The Near Infrared Camera (Cameras One, Two and Three) was used to
make observations of the high-Z damped Lyman-Alpha (DLA) galaxy PKS0528-25.
The 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 DLA galaxies. The observations
were completed as planned, and no problems were reported.

1.14 Completed STIS/CCD 7910 (STIS Extragalactic Parallel Survey)

The Space Telescope Imaging Spectrograph (CCD) was used to make
extragalactic slitless spectrographic observations as part of the parallel
high galactic latitude survey to search for emission line galaxies. Data
was taken in parallel, and are not subject to proprietary time. The
observations were executed as scheduled, and no anomalies were noted.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions : 9
Successful : 9

Scheduled Reacquisitions : 7
Successful : 7

2.2 FHST Updates:

Scheduled : 16
Successful : 16

2.3 Operations Notes:

Using ROP SR-1, the SSR EDAC eror counter was cleared two times.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/DMH