We present BVR photometric observations of the blazar PKS 0736+017. These observations were carried out with three telescopes in Mexico and two in Spain between...
Optical variability of the blazar 3C 371: From minute to year timescales
Context. The BL Lac object 3C 371 was observed by the Transiting Exoplanet Survey Satellite (TESS) for approximately a year, between July 2019 and July 2020...
Optical variability of the ultracool dwarf TVLM 513-46546: evidence for inhomogeneous dust clouds
We present multicolour photometry of the M8.5V ultracool dwarf `pulsar' TVLM 513-46546 (hereafter TVLM 513) obtained with the triple-beam photometer ULTRACAM...
Optical, X-ray, and γ-ray observations of the candidate transitional millisecond pulsar 4FGL J0427.8-6704
We present an optical, X-ray, and γ-ray study of 1SXPS J042749.2-670434, an eclipsing X-ray binary that has an associated γ-ray counterpart, 4FGL J0427.8-6704...
Optical/infrared observations of the X-ray burster KS1731-260 in quiescence
Aims: We performed an optical/infrared study of the counterpart of the low-mass X-ray binary KS 1731-260 to test its identification and obtain information about...
Optical/NIR stellar absorption and emission-line indices from luminous infrared galaxies
We analyse a set of optical-to-near-infrared long-slit nuclear spectra of 16 infrared-luminous spiral galaxies. All of the studied sources present H2 emission...
Optical/X-ray/radio view of Abell 1213: A galaxy cluster with anomalous diffuse radio emission
Context. Abell 1213, a low-richness galaxy system, is known to host an anomalous radio halo detected in data of the Very Large Array (VLA). It is an outlier...
Optically Faint Massive Balmer Break Galaxies at z > 3 in the CANDELS/GOODS Fields
We present a sample of 33 Balmer break galaxies (BBGs) selected as Hubble Space Telescope/F160W dropouts in the deepest CANDELS/GOODS fields (H ≳ 27.3 mag) but...