Astronomy and Astrophysics – Astronomy
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....40.1215m&link_type=abstract
American Astronomical Society, SPD meeting #40, #12.15; Bulletin of the American Astronomical Society, Vol. 41, p.830
Astronomy and Astrophysics
Astronomy
Scientific paper
In this work the temperature and emission measure for solar X-ray emission are calculated at times for which there are no solar flares. Approximately 8700 time intervals during the RHESSI mission, from launch in Feb 2002 until August 2006, have been analyzed, using RHESSI and GOES data. High temperature emission, in the temperature range of 5 to 10 MK, is typically present during active times and is attributed to solar active regions. From comparisons of the RHESSI and GOES temperature measurements, it is seen that RHESSI temperatures are typically higher than GOES, with smaller emission measure for RHESSI, but with values for the two instruments that are not necessarily well correlated. In particular, for many time intervals from 2003 to 2006, the GOES temperature is unexpectedly higher than the RHESSI temperature. This is probably due to the effect of background particles. This work was supported by NASA contract NAS5-98033 and NASA grant NNX08AJ18G.
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