S320p.05 — Thermal characteristics of multi-wavelength emission during a B8.3 flare occurred on July 04, 2009

Date & Time

Aug 10th at 6:00 PM until 7:30 PM




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Author(s): Arun Kumar Awasthi3, Barbara Sylwester2, Janusz Sylwester2, Rajmal Jain1

Institution(s): 1. Kadi Sarva Vishwavidyalaya, 2. Solar Physics Division, Space Research Centre, Polish Academy of Sciences, 3. University of Wroclaw

We explore the temporal evolution of flare plasma parameters including temperature (T) – differential emission measure (DEM) relationship by analyzing high spectral and temporal cadence X-ray emission in 1.2-20 keV energy band, recorded by SphinX (Polish) and Solar X-ray Spectrometer (SOXS; Indian) instruments, during a B8.3 flare which occurred on July 04, 2009. SphinX records X-ray emission in 1.2-15 keV energy band with the temporal and spectral cadence as good as 6µs and 0.4 keV, respectively. On the other hand, SOXS provides X-ray observations in 4-25 keV energy band with the temporal and spectral resolution of 3s and 0.7 keV, respectively. In addition, we integrate co-temporal EUV line emission in 171, 194 and 284 angstrom obtained from STEREO mission in order to explore low-temperature response to the flare emission. In order to fit observed evolution of multi-wavelength emission during the flare, we incorporate multi-Gaussian and well-established Withbroe - Sylwester maximum likelihood DEM inversion algorithms. Thermal energetics are also estimated using geometrically corrected flaring loop structure obtained through EUV images of the active region from STEREO twin satellites. In addition, we also study the trigger and energy release scenario of this low-intensity class flare in terms of magnetic field as well as multi-wavelength emission.