Occulted Hard X-ray Flare Observations with Sentinels

Details Occulted Hard X-ray Flare Observations with Sentinels Occulted Hard X-ray Flare Observations with Sentinels

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsh53c..07k&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SH53C-07

Mathematics

Probability

7509 Corona, 7519 Flares, 7554 X-Rays, Gamma Rays, And Neutrinos, 7594 Instruments And Techniques

Scientific paper

Multi-spacecraft hard X-ray observations provided by the Sentinel mission will give different view angles of solar flares, including the possibility of partially occulted observations. Occultation of the main flare emission by the solar limb allows us to study fainter coronal emission that otherwise would be hidden by the limited dynamic range of the observations. Furthermore, it will allow to measure directivity and reconstruct the 3 dimensional geometry of X-ray sources. We use statistical results from RHESSI observations to derive the probability of occulted flare observations with Sentinels. A statistical study of 19 giant flares with fast CMES (v>1500 km/s) occurring behind the solar limb is presented. We find that all events occurring 45 degrees or less behing the limb (corresponding to an occultation height h < 0.4~Rsun) show X-ray enhancements, while the three events occurring more than 50 degrees (h>1~Rsun) behind the limb do not. This result indicates that on the average, two Sentinels will see the total flare, while one spacecraft will see the flare partially occulted. The most prominent event in our RHESSI survey will be discussed in detail. It has an occultation high of 0.3 solar radius, but still shows emission up to 80 keV. The observed hard X-ray source is extended, with a size of about 200", and moves upwards with a velocity of ~1000 km/s.

Affiliated with

Also associated with

No associations

Rating

Occulted Hard X-ray Flare Observations with Sentinels does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Occulted Hard X-ray Flare Observations with Sentinels, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Occulted Hard X-ray Flare Observations with Sentinels will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-969372