Aims. This study aims to identify very low-mass members within the Barnard 30 dark cloud, with a particular focus on detecting objects in the substellar domain, including those within the planetary-mass regime. Methods. We employed deep photometric observations using data from the Euclid mission, incorporating advanced data-processing techniques --

We present a timing analysis of the black hole transient Swift J1727.8─1613 during its intermediate state. We use coordinated broad-band X-ray observations from Insight─HXMT (2─150 keV), together with optical data from ULTRACAM ( $g_s$ and $i_s$ bands) and near-infrared data from HAWK-I ( $K_s$ band), obtained on 2023 September 9. As shown by

We use Keck/KCWI spectroscopy to study one ultra-diffuse galaxy (UDG) and five Nearly UDGs (NUDGEs) in the Perseus cluster, together with an additional UDG in the Coma cluster. As the first paper in a series, we focus on the global and radial stellar population properties of our sample. We find that these galaxies host intermediate-to-old stellar

Context. Microwave kinetic inductance detectors (MKIDs) are superconducting detectors that have the potential to contribute to the construction of over 10 000 pixel cameras required for mm and submm astronomical observations over the next decade. One of the issues related to its application is two-level-system (TLS) noise that creates a 1/f term in

We present the methodology for the weak lensing and galaxy clustering analyses of the Dark Energy Survey (DES) Year 6 dataset. In this work, we design and validate the analysis pipeline for the cosmic shear, galaxy clustering plus galaxy--galaxy lensing ( 2 × 2 pt), and the joint analysis in the 3 × 2 pt. Our framework accounts for key theoretical