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HUBBLE SPACE TELESCOPE

DAILY REPORT #2435

PERIOD COVERED: 0000Z (UTC) 08/12/99 - 0000Z (UTC) 08/13/99

Daily Status Report as of 225/0000Z

1.0 ACTIVITIES SCHEDULED AND ACCOMPLISHED:

1.1 Completed Two Sets of STIS/CCD 8408 (STIS CCD Dark Monitor C8)

The Space Telescope Imaging Spectrograph (CCD) was used to make a CCD
bias calibration observation. This is to monitor the darks for the STIS CCD.
The observations were executed as scheduled, and no anomalies were reported.

1.2 Completed STIS/CCD 8271 (A Snapshot Survey of LMC Planetary Nebulae: A
Study of Nebular and Late Stellar Evolution)

The Space Telescope Imaging Spectrograph (CCD) was used to make
medium-resolution slitless spectroscopy snapshot images of the planetary nebula
LMC-SMP-9 located in the Large Magellanic Cloud to study the parallel evolution
of the nebulae and its central star. The observations were completed as
planned, and no problems were reported.

1.3 Completed Two Sets of WF/PC-2 8192 (A Snapshot Survey of Probable Nearby
Galaxies)
The WF/PC-2 was used to make a snapshot survey images of a probable
nearby galaxies MB-2 and Maffei-2KK035. The census of galaxies in the Local
Volume of space is very incomplete, particularly at the faint end. The
observations were executed as scheduled, and no anomalies were noted

1.4 Completed STIS/CCD 8409 (STIS CCD Bias Monitor C8)

The Space Telescope Imaging Spectrograph (CCD) was used to make a CCD
bias calibration observation. This is to monitor the bias in the 1x1, 1x2,
2x1, and 2x2 bin settings at gain=1, and 1x1 at gain = 4, to build up high-S/N
superbiases and to track the evolution of hot columns. The observations were
executed as scheduled, and no anomalies were reported.

1.5 Completed Two 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.

1.6 Completed Two Sets of STIS/CCD 8202 (Bright Quasar Close Lensing Search)

The Space Telescope Imaging Spectrograph (CCD) was used to make
observations of HCLQ0035-5 and HCLQ1351-0 as part of a second generation survey
to search for bright lensing quasars. With the restored PSF, new images will
be considerably more sensitive to the presence of both close separation and
faint lens components, and because STIS reaches two magnitudes fainter the PC,
the new snapshot images will have much greater dynamic range. The observations
were executed as scheduled, and no anomalies were noted.

1.7 Completed WF/PC-2 8345 (Multipolar Bubbles and Jets in Very Low
Excitation Planetary Nebulae - A WF/PC-2 H-Alpha Imaging Survey)

The WF/PC-2 was used to make H-Alpha observations of the very low
excitation planetary nebula PK000+17D1 in order to study its multipolar bubbles
and jets. Comparison of the morphology of this young PNe sample with more
evolved PNe populations will set new constraints on models for the production
of jet-like outflows and nebular evolution. The observations were completed as
planned, and no problems were reported.

1.8 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 (a.k.a., 9617). 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.

1.9 Completed STIS/CCD/MA2 8257 (VV Cephei: The Egress from Chromospheric
Eclipse)

The Space Telescope Imaging Spectrograph was used to make choromospheric
observations of the egress from eclipse of star VV Cephei (a.k.a., HD208816).
This is to make observations of the long-period {20.3 yrs} eclipsing binary VV
Cephei {M2 Iab + B0} as it continues to emerge from chromospheric eclipse. A
wavelength calibration image was also taken. The observations were executed as
scheduled, and no anomalies were noted.

1.10 Completed Two 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.

1.11 Completed STIS/CCD/MA1 8241 (A Snapshot Survey of Interstellar
Absorption Lines)

The Space Telescope Imaging Spectrograph (CCD and MA1) was used to make
high resolution Echelle spectrographic observations of the standard ultraviolet
star HD206773 as part of a snapshot survey of interstellar absorption lines. A
wavelength calibration image was also taken. The observations were executed as
scheduled, and no anomalies were noted.

1.12 Completed WF/PC02 8167 (WF/PC-2 Imaging of a Galaxy at z = 5.34 and its
Field)

The WF/PC-2 was used to make observations of the galaxy 0140+326D which
is at a distance of Z = 5.34. This galaxy was the first spectroscopically
confirmed object at Z > 5 and among the few confirmed objects at z > 5
currently. The observations were completed as planned, and no anomalies were
reported.

1.13 Completed WF/PC-2 8330 (High Resolution Imagery of Selected Symbiotic
Stars)

The WF/PC-2 was used to make high resolution observations of the
variable symbiotic star CH-Cyg. A fuller understanding of the symbiotic star
phenomenon is important to several branches of astrophysics including mass
loss, accretion onto compact objects, and photoionization and radiative
transfer in gaseous nebulae. The observations were completed as scheduled, and
no problems were reported.

2.0 FLIGHT OPERATIONS SUMMARY:

2.1 Guide Star Acquisitions:

Scheduled Acquisitions: 9
Successful: 9

Scheduled Re-acquisitions: 8
Successful: 8

2.2 FHST Updates:

Scheduled: 12
Successful: 12

2.3 Operations Notes:

HST operations continues to be run on CCS String “B”. Due to recurring
ISP problems, the string was re-cycled at 224/1824Z and at 224/1945Z.

The SSR EDAAC error counter was cleared three times per ROP SR-1.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

Continuation of normal science observations and calibrations.

/DMH