FAUST

Evidence of a diffuse, extended continuum source in quasars from the relative sizes of the broad line region and the UV-optical continuum source measured with microlensing

TDCOSMO XVII. New time delays in 22 lensed quasars from optical monitoring with the ESO-VST 2.6m and MPG 2.2m telescopes

We present new time delays, the main ingredient of time delay cosmography,for 22 lensed quasars resulting from high-cadence r-band monitoring on the 2.6m ESO VLT Survey Telescope and Max-Planck-Gesellschaft 2.2 m telescope. Eachlensed quasar was typically monitored for one to four seasons, often sharedbetween the two telescopes to mitigate the interruptions forced by the COVID-19pandemic. The sample of targets consists of 19 quadruply and 3 doubly imagedquasars, which received a total of 1 918 hours of on-sky time split into 21 581wide-field frames, each 320 seconds long. In a given field, the 5-{\sigma}depth of the combined exposures typically reaches the 27th magnitude, whilethat of single visits is 24.5 mag - similar to the expected depth of theupcoming Vera-Rubin LSST. The fluxes of the different lensed images of thetargets were reliably de-blended, providing not only light curves withphotometric precision down to the photon noise limit, but also high-resolutionmodels of the targets whose features and astrometry were systematicallyconfirmed in Hubble Space Telescope imaging. This was made possible thanks to anew photometric pipeline, lightcurver, and the forward modelling methodSTARRED. Finally, the time delays between pairs of curves and theiruncertainties were estimated, taking into account the degeneracy due tomicrolensing, and for the first time the full covariance matrices of the delaypairs are provided. Of note, this survey, with 13 square degrees, hasapplications beyond that of time delays, such as the study of the structurefunction of the multiple high-redshift quasars present in the footprint at anew high in terms of both depth and frequency. The reduced images will beavailable through the European Southern Observatory Science Portal.

Revisiting reverberation

A note on some Eocene benthic foraminifers of west and central Iran, with remarks on paleontology and biostratigraphy: reply to Hadi and Schlagintweit comment (2024)

The population of Galactic supernova remnants in the TeV range

Efficiency of a macroroughness block ramp in reducing the impact of low-head dams on riverine fish dispersion

A reflexive collaborative workshop on agroecology narratives and researchers’ postures

Zukunftsfragen der Perinatalmedizin

Psychometric Validation of the Hemophilia Functional Ability Scoring Tool (Hemo-FAST)