A Method to Calculate Background-Subtracted Flare Plasma Parameters Using GOES Over Three Solar Cycles

Details A Method to Calculate Background-Subtracted Flare Plasma Parameters Using GOES Over Three Solar Cycles A Method to Calculate Background-Subtracted Flare Plasma Parameters Using GOES Over Three Solar Cycles

May 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21640436r&link_type=abstract

American Astronomical Society, AAS Meeting #216, #404.36

Astronomy and Astrophysics

Astronomy

Scientific paper

The GOES solar flare catalogue is the largest, self-consistent listing currently available covering three solar cycles - #21, 22, and 23 - from 1974 to the present. Solar X-ray flux integrated over the full solar disk is recorded every 3s in each of the two GOES channels (long; 1-8Å and short; 0.5-4Å). By taking the ratio of the flux in the two passbands, parameters of the SXR-emitting plasma (e.g. temperature, emission measure, radiative loss rate etc.) can be derived, as well as the timescales over which they change. In doing so, it is vital to perform a suitable background subtraction to remove the influence of flux not associated with the flaring plasma. Using the method outlined in Bornmann 1990, we have developed a technique to systematically derive the flare parameters for all GOES flares from 1980 to present after accounting for background emission. This then allows us to make statistically meaningful comparisons between events observed over the course of the past three solar cycles.
This research is generously funded by the Irish Research Council for Science, Engineering and Technology (IRCSET).

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