HUBBLE SPACE TELESCOPE

   DAILY REPORT #2495

PERIOD COVERED:  0000Z (UTC) 11/05/99 - 0000Z (UTC) 11/08/99

Daily Status Report as of 312/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 Completed WF/PC-2 8252 (Extinction Curves of Distant Galaxies)

        The WF/PC-2 was used to make observations of the distant 
galaxy/quasar LBQS1009-0 in order to study its extinction.  The program 
will more than double the number of galaxies in which extinction curves 
have been measured and it will provide the first such measurements far 
outside the Local Group.  The observations were completed as planned, and 
no anomalies were reported.

    1.2 Completed Five 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.

    1.3 Completed Three Sets of STIS/CCD 8409 (CCD Bias Monitor C8)

        The Space Telescope Imaging Spectrograph (CCD) was used to monitor 
the bias in the 1x1, 1x2, 2x1, and 2x2 bin settings at gain=1, and 1x1 at 
gain = 4 in order to build up high-S/N superbiases and track the evolution 
of hot columns.  The observations completed with no problems.

    1.4 Completed Seven Sets of STIS/CCD 8549 (POMS Test Proposal: STIS 
Non-scripted Parallel Proposal Continuation III)

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
high galactic latitude observations as part of a non-scripted POMS Test 
Proposal.  As described in HSTAR 7341 and the previous report, the 
acquisition for the first iteration of this proposal defaulted to fine lock 
back-up on one FGS only, possibly affecting one observation.  Otherwise, 
the observations were completed as scheduled, and no further problems were 
reported.

    1.5 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.  As described in HSTAR 7341 and the 
previous report, the acquisition for the first iteration of this proposal 
defaulted to fine lock back-up on one FGS only, possibly affecting two 
observations.  Otherwise, the observations were executed as scheduled, and 
no further anomalies were noted.

    1.6 Completed STIS/CCD 8104 (Constraints on the Evolution of Powerful 
Radio Galaxies)

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
observations of 3C67.  Recent work has identified the GHz Peaked Spectrum 
and Compact Steep Spectrum radio sources as the most likely candidates for 
the progenitors of the large-scale powerful classical double sources.  Both 
a wavelength calibration image and a CCD flat calibration image were also 
taken.  The observations were completed as planned, and no anomalies were 
reported.

    1.7 Completed WF/PC-2 8059 (POMS Test Proposal: WF-2 Targeted Parallel 
Archive Proposal)

        The WF/PC-2 was used to make observations in parallel with the 
prime science observations.  The parallel opportunities available with 
WF/PC-2 in the neighborhood of bright galaxies are treated in a slightly 
different way from the normal pure parallels.  Local group galaxies offer 
the opportunity for a closer look at young stellar populations. The 
observations were completed as planned, and no anomalies were reported.

    1.8 Completed STIS/CCD/MA1/MA2 8243 (SINS: The Supernova Intensive 
Study - Cycle 8)

        The Space Telescope Imaging Spectroscope (CCD/MA1/MA2) was used to 
make target of opportunity observations of supernova SN1999em.  Supernovae 
reveal the last stages of stellar evolution, create the chemical history of 
the Universe, energize the interstellar gas, and occupy the center of 
attention for the extragalactic distance scale and cosmology.  A wavelength 
calibration image was also taken.  The observations were completed as 
planned, and no problems were reported.

    1.9 Completed FOC/96 7923 (FOC F/96 Turn-on)

        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.

    1.10 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 PK068-02D1 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

    1.11 Completed Four Sets of WF/PC-2 8515 (WF/PC-2 Pre-SM3A UV Baseline 
Observations)

        The WF/PC-2 was used to make far-ultraviolet observations of the 
CVZ targets 1713+695, 1104+602, 2126-734 and 0446+789 as part of the 
WF/PC-2 pre-SM3A UV baseline calibration observations.  The observations 
were completed as planned, and no problems were reported.

    1.12 Completed Two Sets of STIS/CCD 8545 (POMS Test Proposal: STIS 
non-scripted parallel proposal continuation VI)

        The Space Telescope Imaging Spectrograph (CCD) was used to make low 
galactic latitude, non-scripted parallel observations as part of a POMS 
test proposal.  The observations were completed as planned, and no 
anomalies were reported.

    1.13 Completed STIS/CCD 8477 (Star Formation Knots in the Distant Galaxies)

        The Space Telescope Imaging Spectrograph (CCD) was used to obtain 
long slit spectra in star-formation knots in NGC428.  The observations 
completed with no reported problems.

    1.14 Completed WF/PC-2 8403 (A Rare Case of Major LBV Eruption)

        The WF/PC-2 was used to follow in detail the spectrophotometric 
evolution of NGC2363-V1 until the end of its major eruption.  The 
observations completed with no reported problems.

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

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
observations of HCLQ0356-5, HCLQ0250-3, and HCLQ0516-4 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.

    1.16 Completed STIS/CCD/MA1/MA2 8245 (Black Hole Accretion Outbursts in 
Soft X- Ray Transients)

        The Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) was 
used to make observations of the optical and ultraviolet counterpart of a 
soft X-ray outburst region from a black hole accretion disk.  A wavelength 
and a CCD flat calibration images were also taken.  The observations were 
executed as scheduled, and no anomalies were noted.

    1.17 Completed STIS/CCD 8415 (CCD Sparse-Field CTE External C8)

        The Space Telescope Imaging Spectrograph (CCD) was used to make 
observations of M67.  This program will allow the derivation of accurate 
coefficients that can be used to correct low count level data {both imaging 
and spectroscopy} for nonlinearity/CTE effects.  The observations were 
executed as scheduled, and no anomalies were noted.

    1.18 Completed STIS/CCD 8226 (Discerning the Origins of Blue 
Stragglers: Masses and Rotation Rates)

        The Space Telescope Imaging Spectrograph (CCD) was used to study 
the blue stragglers in globular cluster NGC-6752-BS.  Conventional wisdom 
holds that the masses of Blue Straggler Stars in globular clusters are 
significantly larger than the turnoff mass.  A wavelength calibration 
observation was also taken.  The observations were executed as scheduled, 
and no anomalies were noted.

    1.19 Completed WF/PC-2 8398 (Saturn's Rings)

        The WF/PC-2 was used to make observations of the rings around the 
planet Saturn.  Saturn's rings are a unique dynamical laboratory and 
continue to present challenging problems that require additional data to 
attack.  The observations were executed as scheduled, and no anomalies were 
noted.

    1.20 Completed WF/PC-2 7374 (Probing Low Density Cluster Environments 
at Moderate-to-High Redshifts)

        The WF/PC-2 was used to make observations of the galactic cluster 
Gal-Clus-0723.  Recent HST WF/PC-2 images of rich clusters at 
moderate-to-high redshifts have revealed that morphological information is 
a crucial ingredient in understanding the physical processes responsible 
for the evolution of the galaxy population in clusters.  The observations 
were executed as scheduled, and no anomalies were noted.

    1.21 Completed WF/PC-2 8175 (A Survey of Gravitational Lenses as 
Cosmological Tools III)

        The WF/PC-2 was used to make observations of the gravitational lens 
system B1933+507.  Gravitational lenses are powerful tools for studying 
cosmology, galactic structure, and galaxy evolution.  The observations were 
completed as planned, and no anomalies were reported.

    1.22 Completed STIS/CCD/MA1 8112 (Probing the Galactic Halo and Beyond 
with Young Supernovae)

        The Space Telescope Imaging Spectroscope (CCD/MA1) was used for a 
target of opportunity program to obtain STIS echelle spectra of a bright 
new supernova {V<14} to characterize the ionization state, gas-phase 
abundances, depletion on dust grains, metallicity, and gas kinematics in 
the Galactic halo, the ISM and halo of the SN's host galaxy, and, if the 
properties of the sightline are favorable, in the intervening intergalactic 
medium.  Approximately one hour into this six-and-one-half-hour proposal, 
the MCE-1 reset mentioned in 2.3 occurred.  About an hour later, MAMA-1 was 
recovered and the proposal continued.  At this time, the exact effect on 
the proposal is not known.  Otherwise, the observations completed nominally.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions: 27
Successful: 27

  Scheduled Re-acquisitions: 19
Successful: 19

    2.2 FHST Updates:
Scheduled: 70
Successful: 70

    2.3 Operations Notes:

        The SSR EDAC error counter was cleared nine times per ROP SR-1.

        The CCS "A" string went down due to a failed UPS unit.  Operations 
transferred to "B" string at 309/1641Z.  Then, real-time operations 
transferred to the "G" string at 310/0145Z in preparation for JIS #6 
(Rendezvous/Capture) which will be conducted for approximately 12 hours 
beginning on Monday morning.  The "G" string went down for unknown reasons 
at 311/2103Z, but was back on-line at 311/2139Z.  The operations team moved 
to the back-up facility in Building 23 at 312/0900Z..

        ROP SR-1 was utilized six times to re-dump important data from 
target of opportunity proposals (1.8 and 1.22).

        The SSA transmitter was commanded on and off twice per ROP IC-2.

        The NSSC-1 status buffer was dumped at 309/2323Z as directed by ROP 
NS-3

        Using ROP SR-1, the TRI module was re-configured at 311/0414Z and 
at 311/1935Z.

        There was a STIS MCE-1 reset at 311/145928Z while the high voltage 
was on and while the HST was in an SAA interval.  The target of opportunity 
proposal described in 1.22 was affected (see 1.22 for details).  The STIS 
flight software error counter was reset at 311/1600Z.  MAMA-1 was recovered 
at 311/1705Z, the next time that high voltage was commanded on by normal 
stored commanding.

        The SSR science playback pointer was set at 312/0119Z after a 
re-dump of science data.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of normal science observations and calibrations.

/CAW