Context. Magnetic reconnection in the solar atmosphere drives energetic phenomena, such as Ellerman bombs, UV bursts, and surges. Aims. Our aim is to employ high-resolution observations to advance the general understanding of such phenomena and their mutual connections. Methods. We used coordinated observations from Swedish 1-m Solar Telescope (SST

We study the properties of galaxy cluster two-point correlation function covariance matrices estimated using the linear-construction (LC) method, which is computationally up to 20 times faster than the standard sample-covariance method. Our goal is to assess how well the LC method performs in cosmological parameter estimation compared to the sample

The hotspots of powerful radio galaxies are the sites of high-energy particle acceleration, but radio observations give us limited information on the electron energy distributions that they generate, which affects our overall understanding of their physics and energetics. Optical synchrotron counterparts to radio galaxy hotspots, which probe high

We investigated the pixel-to-pixel noise correlations of HAWAII-2RG (H2RG) detectors using data from preflight testing performed for Euclid. We find that the detectors -- in the absence of input signal, with and without the focal plane electronics that will be used on board Euclid -- carry pixel-to-pixel noise correlations with varying amplitude

We present the discovery of two disky titans in the first data release of the Euclid satellite. These sources are massive (M * > 10 11 M ⊙) star-forming (SFR ~ 20 M ⊙ yr -1) disks located in strong over-dense environments at intermediate redshifts (z ~ 0.75). They represent a small fraction of the massive galaxies in over-dense regions (just four