30 citations · 106 across the 11 of their papers we have counts for
11 papers
Analysis of Solar-like X-Class Flare on Wolf 359 Observed Simultaneously with TESS and XMM-Newton
Małgorzata Pietras, Robert Falewicz, Marek Siarkowski +3
We present an analysis of a flare on the Wolf 359 star based on simultaneous observations of TESS and XMM-Newton. A stellar flare with energy comparable to an X-class solar flare i…
Varying Calcium Abundances in Solar Flares seen by Solar Maximum Mission
Barbara Sylwester, Janusz Sylwester, Kenneth J. H. Phillips +1
We report on calcium abundance estimates during the decay phases of 194 solar X-ray flares using archived data from the Bent Crystal Spectrometer (BCS) on Solar Maxim…
New Solar Flare Calcium Abundances with no Surprises: Results from the SMM Bent Crystal Spectrometer
J. Sylwester, B. Sylwester, K. J. H. Phillips +1
The calcium abundance in flare plasmas is estimated using X-ray spectra from the Solar Maximum Mission Bent Crystal Spectrometer (BCS) during the decays of 194 flares (GOES classif…
On the Application of Differential Evolution to the Analysis of X-Ray Spectra
Anna Kepa, Barbara Sylwester, Marek Siarkowski +1
Using methods of differential evolution (DE,) we determined the coronal elemental abundances and the differential emission measure (DEM) distributions for the plasma flaring on 200…
RESIK and RHESSI observations of the 20 September 2002 flare
A. Kepa, R. Falewicz, M. Siarkowski +1
Soft X-ray spectra 3.33 A - 6.15 A from the RESIK instrument on CORONAS-F constitute a unique database for the study of the physical conditions of solar flare plasmas, enabling the…
A Unique Resource for Solar Flare Diagnostic Studies: the SMM Bent Crystal Spectrometer
J. Sylwester, B. Sylwester, K. J. H. Phillips +2
The Bent Crystal Spectrometer (BCS) on the NASA Solar Maximum Mission spacecraft observed the X-ray spectra of numerous solar flares during the periods 1980 February to November an…
A Multiwavelength Analysis of the Long-duration Flare Observed on 15 April 2002
A. Kepa, B. Sylwester, J. Sylwester +2
We present a multiwavelength analysis of the long duration flare observed on 15 April 2002 (soft X-ray peak time at 03:55 UT, SOL2002-04-15T03:55). This flare occurred on the disk…
RESIK Solar X-ray flare element abundances on a non-isothermal assumption
B. Sylwester, K. J. H. Phillips, J. Sylwester +1
Solar X-ray spectra from the RESIK crystal spectrometer on the {\em CORONAS-F} spacecraft (spectral range ~Å) are analyzed for thirty-three flares using a method to derive…
Solar Flare Composition and Thermodynamics from RESIK X-ray Spectra
B. Sylwester, J. Sylwester, K. J. H. Phillips +2
Previous estimates of the solar flare abundances of Si, S, Cl, Ar, and K from the RESIK X-ray crystal spectrometer on board the CORONAS-F spacecraft were made on the assumption of…
Silicon abundance from RESIK solar flare observations
B. Sylwester, K. J. H. Phillips, J. Sylwester +1
The RESIK instrument on the CORONAS-F spacecraft obtained solar flare and active region X-ray spectra in four channels covering the wavelength range 3.8 -- 6.1 Åin its operational…
Diagnostic of the temperature and differential emission measure (DEM) based on Hinode/XRT data
M. Siarkowski, R. Falewicz, A. Kepa +1
We discuss here various methodologies and an optimal strategy of the temperature and emission measure diagnostics based on Hinode X-Ray Telescope data. As an example of our results…