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Boost recall in QSO selection from highly imbalanced photometric datasets
Giorgio Calderone, Francesco Guarneri, Matteo Porru +9
Context. The identification of bright QSOs is of great importance to probe the intergalactic medium and address open questions in cosmology. Several approaches have been adopted to…
Crossing the Rubicon of Reionization with z~5 QSOs
A. Grazian, K. Boutsia, E. Giallongo +12
One of the key open questions in Cosmology is the nature of the sources that completed the cosmological hydrogen Reionization at z~5.2. High-z primeval galaxies have been long cons…
Swift/UVOT discovery of Swift J221951-484240: a UV luminous ambiguous nuclear transient
S. R. Oates, N. P. M. Kuin, M. Nicholl +57
We report the discovery of Swift J221951-484240 (hereafter: J221951), a luminous slow-evolving blue transient that was detected by the Neil Gehrels Swift Observatory Ultra-violet/O…
Searching for Intragroup Light in Deep U-band Imaging of the COSMOS Field
Tyler McCabe, Caleb Redshaw, Lillian Otteson +24
We present the results of deep, ground based U-band imaging with the Large Binocular Telescope of the Cosmic Evolution Survey (COSMOS) field as part of the near-UV imaging program,…
Spectroscopy of QUBRICS quasar candidates: 1672 new redshifts and a Golden Sample for the Sandage Test of the Redshift Drift
Stefano Cristiani, Matteo Porru, Francesco Guarneri +10
The QUBRICS (QUasars as BRIght beacons for Cosmology in the Southern hemisphere) survey aims at constructing a sample of the brightest quasars with z>~2.5, observable with faciliti…
Ionized gas kinematics and chemical abundances of low-mass star-forming galaxies at
M. Llerena, R. Amorín, L. Pentericci +6
We selected 35 low-mass SFGs (7.9<log(M/M)<10.3) from deep spectroscopic surveys based on their CIII]1908 emission. We used follow-up NIR observations to examine thei…