We present the results of the study of visible (UBVRIZ) intra-night microvariability in the blazar OJ 287. Useful observations (at least four integrations in a...
The miniJPAS survey quasar selection - I. Mock catalogues for classification
In this series of papers, we employ several machine learning (ML) methods to classify the point-like sources from the miniJPAS catalogue, and identify quasar...
The miniJPAS survey: AGN and host galaxy coevolution of X-ray-selected sources
Studies indicate strong evidence of a scaling relation in the local Universe between the supermassive black hole mass (M BH) and the stellar mass of their host...
The multiple routes of galaxy transformation across the cosmic epochs
In the local universe most of the stellar mass is in passive galaxies, where star formation isabsent or at very low levels. Understanding what are the...
The Nature and Evolution of Classical Double Radio Sources from Complete Samples
We present a study of the trends in luminosity, linear size, spectral index, and redshift of classical double radio sources, from three complete samples...
The Nature and Size of the Optical Continuum Source in QSO 2237+0305
From the peak of a gravitational microlensing high-magnification event in the A component of QSO 2237+0305, which was accurately monitored by the Gravitational...
We present spectroscopic observations of six optical counterparts of ultraluminous X-ray sources (ULXs) around nearby galaxies. The spectra of the six objects...
The near-IR properties and continuum shapes of high redshift quasars from the Sloan Digital Sky Survey
We present J-H-K' photometry for a sample of 45 high redshift quasars found by the Sloan Digital Sky Survey. The sample was originally selected on the basis of...
The optical and UV spectrum of the Seyfert type 2 galaxy NGC 3393
The combined UV and optical spectrum of the Seyfert type 2 galaxy NGC 3393 is presented and analyzed together with published IR and IRAS data. The conditions in...