Abstract:
The Chromospheric Lyman-Alpha Spectro-Polarimeter (CLASP) is the
international sounding-rocket experiment led by Japan and United States
under the collaborations with France, Spain and Norway, for aiming the
first measurement of the linear polarization in the hydrogen Lyman alpha
line (121.567nm) with the high polarimetric sensitivity (0.1%), and
inferring the magnetic field information in the chromosphere and
transition region, where the gas-pressure-dominated photosphere changes
to the magnetic-pressure-dominated corona.
  The CLASP instrument, consisting of a Cassegrain telescope, a
spectropolarimeter and a slit-jaw imaging system, was developed by Japan
with the additional efforts of United States and France. It was launched
at White Sands in United States on September 3, 2015, by using NASA's
sounding rocket, and successfully performed the polarization observation
in Lyman-alpha. Coordinated observations with Hinode, IRIS and
ground-based observatories (e.g. DST in Sac Peak) were also carried out.
  The scientific data taken in this flight look so perfect that they
must include many topics for the investigations, and their analyses just
started recently. In this talk, we will show some preliminary results.