UVCS Data Analysis
UVCS Activities at Medoc/1997
(by Renato Martin)
The UVCS (UltraViolet Coronagraph Spectrometer) experiment is present at
MEDOC with a Team member,Renato Martin , from the University of Torino,
Italy, who is visiting IAS with a PostDoctoral ESA Fellowship.
A Sun Sparc 5 work station dedicated to the scientific analysis of UVCS
data is now operational at MEDOC. On this WS the UVCS Data and Analysis
Software (DAS), allowing for the display, the visualization as well as
some preliminary analysis tasks, has been installed.
The UVCS scientific activities at MEDOC are currently mainly addressed
to the investigation of the UV emission from coronal structures (in particular,
streamers and coronal transients) in the most important spectral lines
observable with the spectrometer. The set of spectral lines includes the
HI 1216 A Lyman alpha, the OVI 1032-1037 A doublet as well as other lines
emitted from heavy ions, which are all best suited for the diagnostics
of the plasma in the extended solar corona at heliocentric distances in
the range from 1.5 to 10. R_0 covered by UVCS. In parallel with the analysis
of the observations, a work is done on the evaluation of the expected line
emission, based on a semiempirical modelling of the coronal structures.
The UVCS representative in MEDOC also participates to the development of
joint activities with the other coronal instruments onboard SOHO (coordinated
observations and JOPs involving an UVCS contribution).
In particular, a study on the physical properties of coronal streamers,
based on the analysis of joint observations of UVCS, CDS and SUMER, is
currently in progress .
R. Martin/ latest update : April 22, 1997