The Signature of Flares in VIRGO Total Solar Irradiance Measurements

Details The Signature of Flares in VIRGO Total Solar Irradiance Measurements The Signature of Flares in VIRGO Total Solar Irradiance Measurements

2010-03-22

arxiv.org/abs/1003.4194v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

SOHO23 Conference Proceedings (Astronomical Society of the Pacific) Eds. S. Cranmer, T. Hoeksema, and J. Kohl

Scientific paper

We use Total Solar Irradiance (TSI) measurements from the VIRGO (Variability of solar IRradiance and Gravity Oscillations) instrument on board SOHO to obtain preliminary estimates of the mean total radiative energy emitted by X-class solar flares. The basic tool is that of summed-epoch analysis, which has also enabled us to detect and partially characterize systematic errors present in the basic data. We describe these errors, which significantly degrade the photometry at high frequencies. We find the ratio of GOES 1-8\{AA} luminosity to total bolometric luminosity to be of order 0.01.

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