This Echo is READ ONLY !   NO Un-Authorized Messages Please!
 ~~~~~~~~~~~~~~~~~~~~~~~~   ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3\07-09 HST Daily Rpt No 3315
Part 4 of 5

STIS/ACS 9384

Ozone, Condensates, and Dust in the Martian Atmosphere

We propose to utilize the unique UV capabilities of STIS and ACS/HRC 
in order to study the spatial and seasonal variations in ozone, 
condensates, and dust in the Martian atmosphere. The data obtained 
will be critical in addressing recent breakthroughs in understanding 
the basic radiative, transport, and microphysical processes that 
provide for both long-term and short-term balance within the global 
Mars climate system. The proposal includes both Cycle 11 & 12 
observations in order to span the classic dust storm season on Mars 
and provide the first good opportunity for HST to synoptically observe 
a dusty atmosphere on the planet. The UV observations will complement 
broad-band visible and IR observations that will be made during the 
Mars Global Surveyor Extended Mission and will provide support for the 
future UV observations of MARCI on the 2005 Mars Reconnaissance 
Orbiter.

STIS/CCD 9239

Absolute Proper Motions of Nearby Dwarf Spheroidal Galaxies-Cycle 10.

The Space Telescope Imaging Spectrograph (CCD) was used to measure 
precise absolute proper motions for four dwarf spheroidal satellites 
of the Milky Way using spectroscopically-confirmed background QSOs to 
define a zero- velocity reference frame.

STIS/CCD 9068

Accurate Determination of the BH Mass in Early-Type Disk Galaxies.

The Space Telescope Imaging Spectrograph (CCD) was used to map the 
ionized gas velocity field of three early-type disk galaxies, for 
which we will be able to derive high precision BH mass measurements. 
The sample galaxies have been selected by means of ground-based high 
resolution spectroscopy among 37 observed objects, since it is 
recognized in their central regions the clear presence of a
circumnuclear Keplerian disk of ionized disk suitable for dynamical 
modeling.

STIS/CCD/MA1 9357

Towards a global understanding of accretion physics --, Clues from an 
UV spectroscopic survey of cataclysmic variables

Accretion inflows and outflows are fundamental phenomena in a wide 
variety of astrophysical environments, such as Young Stellar Objects, 
galactic binaries, and AGN. Observationally, cataclysmic variables 
{CVs} are particularly well suited for the study of accretion 
processes. We propose to carry out a STIS UV spectroscopic snapshot 
survey of CVs that fully exploits the diagnostic potential of these 
objects for our understanding of accretion physics. This survey will 
provide an homogenous database of accretion disc and wind outflow 
spectra covering a wide range of mass transfer rates and binary 
inclinations. We will analyse these spectra with state-of-the-art 
accretion disc model spectra {SYNDISK}, testing our current knowledge 
of the accretion disc structure, and, thereby, providing new insight 
into the so far not well understood process of viscous dissipation. We 
will use our parameterised wind model PYTHON for the analysis of the 
radiation driven accretion disc wind spectra, assessing the 
fundamental question whether the mass loss rate correlates with the 
disc luminosity. In addition, our survey data will identify a number 
of systems in which the white dwarf significantly contributes to the 
UV flux, permitting an analysis of the impact of mass accretion on the 
evolution of these compact stars. This survey will at least double, if 
not triple, the number of high-quality accretion disc / wind outflow / 
accreting white dwarf spectra, and we waive our proprietary rights to 
permit a timely use of this database.

STIS/CCD/MA1/MA2 9036

An Ultraviolet Spectroscopic Survey of Star-Forming Galaxies in the 
Local Universe.

The Space Telescope Imaging Spectrograph (CCD, MA1 and MA2) was used 
to perform a comprehensive STIS ultraviolet spectroscopic survey of 
star-forming galaxies in the local universe. The sample covers a broad 
range of morphologies, chemical composition, and luminosity. The 
observations will provide spectral coverage between 1200 and 3100 
Angstrom, at a resolution of 100 to 200 kms and S/N of about 30. The 
data set will allow the proposers to document and quantify the effects 
of massive stars on the interstellar medium and to infer implications
for the evolution of the host galaxies.

WFPC2 9676

POMS Test Proposal: WFII parallel archive proposal

This is the generic target version of the WFPC2 Archival Pure Parallel 
program.  The program will be used to take parallel images of random 
areas of the sky, following the recommendations of the 2002 Parallels 
Working Group.

WFPC2 9634

POMS Test Proposal: WFII targeted parallel archive proposal

The parallel opportunities available with WFPC2 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. Narrow-band images in 
F656N can be used both to identify young stars via their emission 
lines, and to map the gas distribution in star-forming regions. Thus, 
the filter F656N is added to the four standard filters. Near more
distant galaxies, up to about 10 Mpc, we can map the population of 
globular clusters; for this purpose, F300W is less useful, and only 
F450W, F606W, and F814W will be used.

WFPC2 9594

WFPC2 CYCLE 11 SUPPLEMENTAL DARKS pt2/3

This dark calibration program obtains 3 dark frames every day to 
provide data for monitoring and characterizing the evolution of hot 
pixels

WFPC2/NICMOS/ACS/HRC 9354

Saturn's Atmospheric Structure at Solstice

We propose to image Saturn near its solstice with the same 22 
WFPC2/NICMOS filters which we imaged Saturn near its equinox about six 
years ago.  Additionally, we propose to use the ACS/HRC with its high 
ultraviolet throughput and its superior spatial resolution. All 
filters span a wavelength range of a factor of 10, they cover methane 
band strengths over several orders of magnitude, and they include the 
center and wings of the hydrogen dipole absorption near 2000 nm. Thus, 
they probe many atmospheric levels over five scale heights. The 22 
WFPC2/NICMOS filters have proven to provide an excellent probe of 
Saturn's vertical aerosol structure. The spatial resolution yields
several hundred resolution elements in latitude which can be grouped 
into 10-15 distinct zones. The best viewing of Saturn high southern 
latitudes occurs at its winter solstice which happens during Cycle 11. 
The three spacecraft which have visited Saturn flew by near Saturn's 
equinox, and Cassini will miss the solstice too. HST acquired 
comprehensive data of Saturn near its last equinox in 1995.  The 
proposed observations will expand this data set to Saturn's solstice 
and thus provide a unique record of its seasonal variation.


(continued)

---