HUBBLE SPACE TELESCOPE

   DAILY REPORT #2905

PERIOD COVERED:  0000Z (UTC) 06/29/01 - 0000Z (UTC) 07/02/01

Daily Status Report as of 183/0000Z

1.0 OBSERVATIONS SCHEDULED AND ACCOMPLISHED:

    1.1 Completed Nine Sets of WF/PC-2 8828 (Cycle 9 Supplemental Darks pt3/3)

        The WF/PC-2 was used to obtain three dark frames every day to 
provide data for monitoring and characterizing the evolution of hot 
pixels.  The proposal completed with no reported problems.

    1.2 Completed Three Sets of WF/PC-2 8601 (A Snapshot Survey of Probable 
Nearby Galaxies)

        The WF/PC-2 was used to continue the very successful snapshot 
survey in order to use the high spatial resolution of HST to determine 
whether selected galaxies are nearby on the basis of resolution into stars, 
and the magnitudes and colors of the brightest stars.  There were no 
reported problems.

    1.3 Completed Two Sets of WF/PC-2 8581 (A Search For Low-Mass 
Companions To Ultracool Dwarfs)

        The WF/PC-2 was used to search for very low-mass {VLM} companions 
to a complete sample of 120 late-M and L dwarfs, drawn mainly from the 
2MASS and SDSS surveys.  The primary goal is to determine the multiplicity 
of M < 0.1 M_odot dwarfs.  In particular, we aim to identify binary systems 
suitable for long-term astrometric monitoring and mass measurement, and 
systems with cool, sub-1000K companions.  The proposal completed with no 
reported problems.

    1.4 Completed WF/PC-2 8723 (A Snapshot Survey of Galactic Globular 
Clusters)

        The WF/PC-2 was used to observe the crowded centers of globular 
clusters {GCs} that heretofore have produced intriguing discoveries of new 
phenomena, most of which are not understood theoretically.  The 
observations completed with no reported problems.

    1.5 Completed Five Sets of WF/PC-2 9044 (The Stellar Population of UGCA 
292, An Extreme Low Metallicity Galaxy)

        The WF/PC-2 was used to observe the third lowest metallicity galaxy 
known, UGCA 292, that provides a unique opportunity to investigate the 
evolutionary status of extremely metal--poor, gas--rich, star--forming 
galaxies.  UGCA 292 is sufficiently nearby, that it is possible to resolve 
the stellar population with HST.  These observations enable investigation 
of the stellar population of this relatively unevolved galaxy and determine 
if the low metallicity and high gas mass fraction are indicative of a newly 
formed galaxy.  The observations completed nominally.

    1.6 Completed WF/PC-2 8632 (A UV Atlas of Nearby Galaxies)

        The WF/PC-2 was used to perform a snapshot survey of local galaxies 
at UV wavelengths with the F300W filter.  The aim of the project is to 
build a reference UV Atlas of normal galaxies, whose optical images are 
well known, with the highest possible degree of information, covering all 
the morphological types and luminosity classes.  The proposal completed 
normally.

    1.7 Completed Two Sets of WF/PC-2 9133 (Imaging of Gravitational Lenses)

        The WF/PC-2 was used to observe gravitational lenses that offer 
unique opportunities to study cosmology, galactic structure, galaxy 
evolution, quasar hosts and extinction.  They are also the only sample of 
galaxies selected on the basis of their mass rather than their luminosity 
or surface brightness.  While gravitational lenses can be discovered with 
ground-based optical and radio observatories, converting them from 
curiosities into scientific tools requires HST.  There were no reported 
anomalies.

    1.8 Completed Two Sets of WF/PC-2 8598 (Snapshot Survey of Extended 
OIIl Lambda 5007Angstrom Emission in Seyfert Galaxies)

        The WF/PC-2 was used for a snapshot survey of narrow band OIII 
Lambda 5007Angstrom images for a well defined sample of 88 Seyfert galaxies 
{29 Seyfert 1s and 59 Seyfert 2s}, 18 of which already have data in the 
archive, selected from a mostly isotropic property, the 60Mum flux.  These 
data will be used: 1} to determine the origin of the misalignment between 
the accretion disk axis and the host galaxy plane axis, which can be due to 
mergers with other galaxies, or by the self induced radiation warping; 2} 
to compare the size and shape of the Narrow Line Regions (NLR) of Seyfert 
1s and Seyfert 2s, and to study the frequency of conically shaped NLR in 
Seyfert galaxies, which are usually unresolved from ground-based 
observations; and 3} estimate the importance of shocks to the ionization of 
the NLR.  The observations completed with no reported problems.

    1.09 Completed Four Sets of WF/PC-2 9244 (POMS Test Proposal: WFII 
Parallel Archive Proposal Continuation)

        The WF/PC-2 was used to perform a generic target version of the 
Archival Pure Parallel program.  The program will be used to take parallel 
images of random areas of the sky, following the recommendations of the 
Parallels Working Group.  The observations completed with no anomalous 
activity.

    1.10 Completed Two Sets of FGS/1 8731 (A High Angular Resolution Survey 
of the Most Massive Stars in the SMC)

        Fine Guidance Sensor #1 was used to conduct high angular resolution 
observations of some of the SMC's hottest and most luminous objects by 
conducting a comprehensive survey of nearly every spectral type in the 
upper portion of the HR diagram.  Binary or multiple star systems will be 
detected down to an unprecedented level, more than one order of magnitude 
better than possible with WFPC2.  The targets selected include a 
representative list of normal Main Sequence O-stars and their evolved 
descendents, namely supergiants, hypergiants, LBVs, and WRs, many of which 
have been previously observed by HST's spectrometers for purposes of 
cosmological calibrations.  The observations completed, and no problems 
were reported.

    1.11 Completed Three Sets of WF/PC-2 8683 (Imaging Of Brightest Cluster 
Galaxies: The High End Of The Black Hole Mass Distribution)

        The WF/PC-2 was used to make kinematic black hole detections in 
galaxies to decide whether they indicate that the mass correlates with both 
optical luminosity and radio power.  The observation completed with no 
reported problems.

    1.12 Completed WF/PC-2 8597 (The Fueling of Active Nuclei: Why are 
Active Galaxies Active?)

        The WF/PC-2 was used to investigate the accretion onto massive 
black holes that are believed to be the energy source for AGN.  However, 
evidence for black holes in quiescent galaxies has also been reported.  Why 
are these galaxies inactive?  One possibility is that active galaxies are 
better at providing fuel to the nuclear region than quiescent 
galaxies.  Other possible fueling mechanisms such as ``bars-within-bars'' 
or nuclear spirals cannot be investigated from the ground because they are 
relatively small features in the ISM.  The observations were completed as 
planned.

    1.13 Completed Three Sets of WF/PC-2 9086 (Investigating the Formation 
History of Spiral Galaxy Halos)

        The WF/PC-2 was used to make observations in order to constrain the 
origin of spiral galaxy halos by studying stellar populations near the tip 
of the red giant branch.  This will be the first systematic study of this 
population in external galaxies and will quadruple the sample of normal 
spiral galaxies for which the halo metallicity distribution function is 
measured.  This larger sample will permit study of the relationship between 
the bulge, disk, and halo components and between halos and globular 
systems.  Such correlations will in turn provide indications as to whether 
the halo, bulge, and globular cluster systems built up nearly 
simultaneously in the early universe or were accreted over time through 
different kinds of merging events.  The loss-of-lock described in 2.1 and 
HSTAR 8253 occurred during the first iteration of this proposal, near the 
end of the four-hour duration of the proposal.  Otherwise, the proposal 
completed nominally with no further reported problems..

    1.14 Completed Three Sets of WF/PC-2 8820 (Wavelength Stability of 
Narrow Band and Linear Ramp Filters)

        The WF/PC-2 was used to verify the mapping of wavelength as a 
function of CCD position on linear ramp filters and to check for changes in 
central wavelengths of the narrow band filters.  The proposal completed 
nominally.

    1.15 Completed Four Sets of FGS/1 9034 (The Masses and Luminosities of 
Population II Stars)

        Fine Guidance Sensor #1 was used to observe the mass-luminosity 
relation {MLR} of Population II stars of which very little is currently 
known.  With the advent of the Hipparcos Catalogue, improved distances to 
many spectroscopic binaries known to be Pop II systems are now 
available.  After surveying the literature and making reasonable estimates 
of the secondary masses, we find 13 systems whose minimum separation should 
be larger than the resolution limit of FGS #1.  The observations completed 
nominally.

    1.16 Completed FGS/1R 8618 (Parallaxes of Magnetic CVs)

        The FGSs were used to gather data for the calculation of 
trigonometric parallaxes of cataclysmic variable {CVs} which are needed to 
obtain reliable information on luminosities, accretion rates, and on radii 
and masses of the stellar components.  They are also needed to derive the 
space density, an important ingredient for theories of CV evolution.  The 
observations completed with no reported problems.

    1.17 Completed WF/PC-2 9257 (Cycle 10 Super-PSF)

        The WF/PC-2 was used to obtain deep images of the WFPC2 Point 
Spread Function (PSF) in several broadband filters in order to investigate 
the 2-dimensional structure in the PSF wings and characterize the change in 
structure with varying focus and target color.  There were no reported 
problems.

    1.18 Completed Two Sets of WF/PC-2 8583 (Imaging Snapshots of Asteroids)

        The WF/PC-2 was used to obtain images of the fifty largest main 
belt asteroids that have favorable apparitions during cycle 9.  The images 
will be searched for companion bodies, as well as mineralogical variegation 
on the resolved main bodies.  There were no reported problems.

    1.19 Completed WF/PC-2 8177 (Investigating Type Ia Supernovae and an 
Accelerating Universe)

        The WF/PC-2 was used to obtain rest frame U and B photometry for 
four z~ 0.85 Supernova (SN) Ia.  These observations will be coupled to 
ground-based rest frame V photometry and spectra.  These data, combined 
with previous samples, will extend the D_L vs. z diagram for SN Ia to 
z~0.85, and allow us to discriminate the redshift dependence of supernova 
magnitudes in an accelerating Universe from that expected to result from 
systematic effects such as age of the stellar population, chemical 
evolution, a drift in the properties of dust, and weak gravitational 
lensing.  The proposal completed with no reported problems.

    1.20 Completed WF/PC-2 8829 (Observatory Focus Monitor)

        The WF/PC-2 was used to analyze the HST focus which drifts slowly 
and shows evidence of undergoing slips of a few microns at random 
times.  The rate of the WFPC2 monitoring program is insufficient to track 
and/or understand OTA behavior in order to request timely and appropriate 
secondary mirror corrections.  This 14-orbit program obtains a large amount 
of high signal to noise focus data and will be sufficient to more 
accurately define the HST focus.  There were no reported problems.

2.0 FLIGHT OPERATIONS SUMMARY:

    2.1 Guide Star Acquisitions:
       Scheduled Acquisitions: 32
Successful: 32

        There was a loss-of-lock at 180/202046Z during the proposal 
detailed in 1.13.  Lock was recovered via new #44 commanding.  HSTAR 8253 
was written.

        Per HSTAR 8255, another loss-of-lock occurred at 
183/040652Z.  There were no executing proposals at that time.
  Scheduled Re-acquisitions: 16
Successful: 16

    2.2 FHST Updates:
Scheduled: 69
Successful: 68

        Per HSTAR 8254, the full maneuver update scheduled for 180/230100Z 
failed due to FGS-2.  The subsequent acquisition was successful.

    2.3 Operations Notes:

        The STIS instrument remains in safe mode.

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

        The engineering status buffer limits were adjusted at 180/2302Z per 
ROP DF-18A.

        An SSR-1 record session was commanded at 182/2124Z as directed by 
ROP SR-4A.

3.0 SIGNIFICANT FORTHCOMING EVENTS:

        Continuation of normal science observations and calibrations.

/CAW