Dr.
Dennis has been interested in high-energy phenomena in the universe,
starting with cosmic ray observations, then X-ray observations, and since
1980, with X-ray observations of solar flares. He is particularly interested
in the development of advanced instrumentation for X-ray imaging
spectroscopy of solar flares with both high energy resolution and high
angular resolution.
Solar Storms of April 14 - 24, 2002
Flare Catalog - GOES and
RHESSI Events
List of all GOES
events (≥C1) during the storm period with
corresponding RHESSI events.
GOES start/peak/end times, class, and location and active region if known.
RHESSI count rates in the 3-6-12-25-50 keV bands, the shutter state, and the
orbit status at the time of the flare (daytime or nighttime).
Clicking on Day/Night indicator brings up RHESSI light curves of the event
period.
April 21, 2002, X1.5 Flare
Spectral analysis results from SPEX using a broken power law plus
Gaussians to fit the spectra from 00:40 to 00:48 UT in one minute intervals.
Spectral
analysis results from SPEX using a broken power law plus Gaussians to
fit the spectra on the second orbit from 02:10 to 03:10 UT in one minute
intervals.