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Joint X-ray, EUV and UV Observations of a Small Microflare
Iain G. Hannah, Lucia Kleint, Säm Krucker +5
We present the first joint observation of a small microflare in X-rays with the Nuclear Spectroscopic Telescope ARray (NuSTAR), UV with the Interface Region Imaging Spectrograph (I…
Heating of the solar photosphere during a white-light flare
Jan Jurcak, Jana Kasparova, Michal Svanda +1
The \ion{Fe}{i} lines observed by the Hinode/SOT spectropolarimeter were always seen in absorption, apart from the extreme solar limb. Here we analyse a unique dataset capturing th…
High-Density Off-Limb Flare Loops Observed by SDO
S. Jejčič, L. Kleint, P. Heinzel
The density distribution of flare loops and the mechanisms of their emission in the continuum are still open questions. On September 10, 2017 a prominent loop system appeared durin…
Nonlinear force-free modeling of flare-related magnetic field changes at the photosphere and chromosphere
Lucia Kleint, Michael S. Wheatland, Alpha Mastrano +1
Rapid and stepwise changes of the magnetic field are often observed during flares but cannot be explained by models yet. Using a 45 min sequence of SDO/HMI 135 s fast-cadence vecto…
Identifying typical Mg II flare spectra using machine learning
B. Panos, L. Kleint, C. Huwyler +4
IRIS performs solar observations over a large range of atmospheric heights, including the chromosphere where the majority of flare energy is dissipated. The strong Mg II h&k spectr…
Understanding the HMI pseudocontinuum in white-light solar flares
M. Svanda, Jan Jurcak, Jana Kasparova +1
We analyse observations of the X9.3 solar flare (SOL2017-09-06T11:53) observed by SDO/HMI and Hinode/SOT. Our aim is to learn about the nature of the HMI pseudocontinuum Ic used as…