The typical detection rate of ~1 gamma-ray burst (GRB) per day by the Fermi Gamma-ray Burst Monitor (GBM) provides a valuable opportunity to further our understanding of GRB physics. However, the large uncertainty of the Fermi localization typically prevents rapid identification of multiwavelength counterparts. We report the follow-up of 93 Fermi

We analyse a sample of 12 galaxy clusters, from the Kapteyn IAC WEAVE INT Cluster Survey (KIWICS) looking for dwarf galaxy candidates. By using photometric data in the r and g bands from the Wide Field Camera (WFC) at the 2.5-m Isaac Newton Telescope (INT), we select a sample of bright dwarf galaxies (M$_r\, \le$ -15.5 mag) in each cluster and

We present a dynamical study of the intermediate polar and dwarf nova cataclysmic variable GK Persei (Nova Persei 1901) based on a multisite optical spectroscopy and R-band photometry campaign. The radial velocity curve of the evolved donor star has a semi-amplitude $K_2=126.4 \pm 0.9 \, \mathrm{km}\, \mathrm{s}^{-1}$ and an orbital period $P=1

We present measurements of the radial profiles of the mass and galaxy number density around Sunyaev-Zel'dovich (SZ)-selected clusters using both weak lensing and galaxy counts. The clusters are selected from the Atacama Cosmology Telescope Data Release 5 and the galaxies from the Dark Energy Survey Year 3 data set. With signal-to-noise ratio of 62

En 2018, el ciclo solar 24 entró en una fase de mínimo solar. Durante este periodo, se recogieron 11 millones de datos de brillo cenital del cielo nocturno (NSB, por sus siglas en inglés) en diferentes lugares oscuros del planeta, incluyendo observatorios astronómicos y áreas naturales protegidas, con fotómetros idénticos de banda ancha tipo TESS

Se presentan las principales características del SG-WAS (Sensor Autónomo Inalámbrico SkyGlow), un dispositivo low-cost para medir el brillo del cielo nocturno (NSB). El SG-WAS está basado en el sensor TSL237 -como el Unihedron Sky Quality Meter (SQM) o el STARS4ALL Telescope Encoder and Sky Sensor (TESS)-, con comunicación inalámbrica (LoRa, WiFi o