Swift J1727.8-1613 (originally GRB 230824A: GCN #34536, #34537) has been recently classified as a new low-mass X-ray binary (LMXB) undergoing a bright X-ray outburst (ATel #16205, #16206, #16207,#16210, #16215).

HD 235088 (TOI-1430) is a young star known to host a sub-Neptune-sized planet candidate. We validated the planetary nature of HD 235088 b with multiband photometry, refined its planetary parameters, and obtained a new age estimate of the host star, placing it at 600-800 Myr. Previous spectroscopic observations of a single transit detected an excess

We use X-ray observations of quasar microlensing (sensitive to smaller compact objects than in the optical) to study the possible presence of a population of low mass black holes (BHs; from ~10 -3 M ⊙ to 10 -1 M ⊙) in lens galaxies. We compare these observations with microlensing magnification simulations of a mixed population of stars and BHs plus

We present 0.4 arcsec-resolution mid-IR imaging polarimetry, obtained with CanariCam at GTC, of the central 0.11 pc x 0.28 pc (4.2 arcsec x 10.8 arcsec) region of W51 IRS2. The observed mid-IR polarization across this region is typically several percent, with values as high as 12%. The polarization arises from ensembles of non-spherical silicate

Big Datasets are becoming more and more prominent in the field of astrophysics with new powerful telescopes and surveys capturing parts of our night sky in an almost continuous fashion. Consequently, unsupervised Machine Learning is key to getting first insight into this abundance of data. We present our results on the performance of unsupervised

We present the results of photometric and spectroscopic monitoring campaigns of the changing look AGN NGC 2617 carried out from 2016 until 2022 and covering the wavelength range from the X-ray to the near-IR. The facilities included the telescopes of the SAI MSU, MASTER Global Robotic Net, the 2.3-m WIRO telescope, Swift, and others. We found