Study 000296:

ACRONYM:  cavity_dem

The study is designed to be used in examining
the density and temperature characteristics of prominence
and prominence cavities through the fitting of DEM curves
at every pixel in a set of spectroscopic images.
Previous observing runs have been done on cavities using
dhb_polar_scan, pry_ch_density, and gad_raster_2. 
Analysis on these data sets have provided quality data for
preliminary analysis and have been helpful in realizing the
design of a cavity specific study.  This study makes
use of 10 Fe lines (in 9 windows).  By focusing solely on iron lines,
it is possible to neglect relative elemental abundance errors in the
DEM analysis.  Two  sets of density sensitive lines are chosen,
for Fe VIII and Fe XII, with complimentary ranges spanning densities
from 10^7-10^10 cm^-3. By using the 2” slit and long exposures,
a signal can be obtained well into the corona.
A wide FOV is necessary to capture the contrast between the cavity
and the surrounding coronal plasma.  These features of the study
will allow us to better probe the temperature structure of
prominence cavities with regard to radial height and in relation to
the prominence.

TARGET: Prominence and surrounding corona (off limb)

EXPOSURE TIME: 100s
RASTER: Scanning
SLIT: 2"
STEP SIZE: 2"
FOV: 302"x352"
RASTER DURATION: 4h30m
TOTAL VOLUME: 105 Mbits

WARNING:

None