The TESS mission has reported a wealth of new planetary systems around bright and nearby stars amenable for detailed characterizations of planet properties and atmospheres. However, not all interesting TESS planets orbit around bright host stars. TOI-263 b is a validated ultra-short-period substellar object in a 0.56-day orbit around a faint (V =

El pasado 24 de enero tuvo lugar la puesta en órbita de DRAGO ( Demonstrator for Remote Analysis of Ground Observations), el primer instrumento desarrollado por IACTEC-Espacio. Semanas después llegaban sus primeras imágenes infrarrojas de la Tierra, con una calidad a la altura de las expectativas más optimistas. DRAGO es el resultado de cuatro años

Nuclear star clusters (NSCs) are the densest stellar systems in the Universe and are found in the centres of all types of galaxies. They are thought to form via mergers of star clusters such as ancient globular clusters (GCs) that spiral to the centre as a result of dynamical friction or through in situ star formation directly at the galaxy centre

We present the discovery of eclipses in the X-ray light curves of the X-ray binary Swift J1858.6-0814. From these, we find an orbital period of $P=76841.3_{-1.4}^{+1.3}$ s (≍21.3 h) and an eclipse duration of $t_{\rm ec}=4098_{-18}^{+17}$ s (≍1.14 h). We also find several absorption dips during the pre-eclipse phase. From the eclipse duration to

We describe the Dark Energy Survey (DES) photometric data set assembled from the first three years of science operations to support DES Year 3 cosmologic analyses, and provide usage notes aimed at the broad astrophysics community. Y3 GOLD improves on previous releases from DES, Y1 GOLD, and Data Release 1 (DES DR1), presenting an expanded and

Bill Gray of Project Pluto brought to our attention an error of 0.03° in the listed latitude of our Kitt Peak telescope. While correcting the table where this occurred, we also take the opportunity to update the instrument properties and weather statistics of our remote telescopes.