Optical and radio observations of the BL Lacertae object OJ 287 made early in 1989 show a sudden fade in both wavelength ranges. From January to early April the...
Baryon acoustic oscillations from Integrated Neutral Gas Observations: Broadband corrugated horn construction and testing
The Baryon acoustic oscillations from Integrated Neutral Gas Observations (BINGO) telescope is a 40-m class radio telescope under construction that has been...
Dual-frequency mapping with the Tenerife cosmic microwave background experiments
We present maps of the sky at intermediate angular resolution (5 deg) of the declination range 35.0-45.0 deg obtained with the Tenerife cosmic microwave...
Extragalactic Magnetism with SOFIA (Legacy Program). I. The Magnetic Field in the Multiphase Interstellar Medium of M51
The recent availability of high-resolution far-infrared (FIR) polarization observations of galaxies using HAWC+/SOFIA has facilitated studies of extragalactic...
First simultaneous UBVRI photopolarimetric observations of a sample of normal quasars
We present what we believe to be the first truly simultaneous UBVRI photopolarimetric results for a sample of eight 'normal' quasars. In five of these quasars...
First Working Group Meeting on Radioastronomical Databases
The aims, achievements and plans of the Working Group on `Radioastronomical Databases' of IAU Commission 40 are outlined. Special recommendations emerged from...
Interstellar and intergalactic gas in the direction of SN 1993J in M81
During the first few nights following its discovery, we observed the interstellar Ca II and Na I lines towards supernova 1993J at high spectral resolution (full...
MIGHTEE-HI: Evolution of HI Scaling Relations of Star-forming Galaxies at z < 0.5
We present the first measurements of H I galaxy scaling relations from a blind survey at z > 0.15. We perform spectral stacking of 9023 spectra of star-forming...
A grid of evolutionary synthesis models for different scenarios (initial mass function slope, metallicity, age, etc.) and computing a set of observables in a...