46 citations · 272 across the 19 of their papers we have counts for
12 papers · 1 filter
Scavenger hunt: Selection of obscured active galactic nuclei combining multiband optical variability and colors
Demetra De Cicco, Stefano Cavuoti, Maurizio Paolillo +3
As wide-field optical surveys such as Vera Rubin Observatory's Legacy Survey of Space and Time (LSST) begin operations, time-domain astronomy is facing a data revolution, paving th…
The ensemble broad-frequency power spectrum of Stripe-82 quasars from multiple surveys
Vincenzo Petrecca, Iossif E. Papadakis, Maurizio Paolillo +5
Variability is a striking features of quasars, observed at all timescales wavelengths. Studying its properties and the correlations with the physical parameters (e.g. black hole ma…
Selection of optically variable active galactic nuclei via a random forest algorithm
Demetra De Cicco, Gaetano Zazzaro, Stefano Cavuoti +5
Context. A defining characteristic of active galactic nuclei (AGN) that distinguishes them from other astronomical sources is their stochastic variability, which is observable acro…
A structure function analysis of VST-COSMOS AGN
D. De Cicco, F. E. Bauer, M. Paolillo +6
We present our sixth work in a series dedicated to variability studies of active galactic nuclei (AGN) based on the survey of the COSMOS field by the VLT Survey Telescope (VST). It…
The VST Early-type GAlaxy Survey: Exploring the Outskirts and Intra-cluster Regions of Galaxies in the Low-surface-brightness Regime
Enrichetta Iodice, Marilena Spavone, Massimo Capaccioli +15
The VST Early-type GAlaxy Survey (VEGAS) is a deep, multi-band (u, g, r, i) imaging survey, carried out with the 2.6-metre VLT Survey Telescope (VST) at ESO's Paranal Observatory i…
Extending the variability selection of active galactic nuclei in the W-CDF-S and SERVS/SWIRE region
M. Poulain, M. Paolillo, D. De Cicco +14
Variability has proven to be a powerful tool to detect active galactic nuclei (AGN) in multi-epoch surveys. The new-generation facilities expected to become operational in the next…
Optically variable active galactic nuclei in the 3 yr VST survey of the COSMOS field
D. De Cicco, M. Paolillo, S. Falocco +16
The analysis of the variability of active galactic nuclei (AGNs) at different wavelengths and the study of possible correlations among different spectral windows are nowadays a maj…
C IV BAL disappearance in a large SDSS QSO sample
D. De Cicco, W. N. Brandt, C. J. Grier +4
Broad absorption lines (BALs) in the spectra of quasi-stellar objects (QSOs) originate from outflowing winds along our line of sight; winds are thought to originate from the inner…
The VOICE Survey : VST Optical Imaging of the CDFS and ES1 Fields
M. Vaccari, G. Covone, M. Radovich +15
We present the VST Optical Imaging of the CDFS and ES1 Fields (VOICE) Survey, a VST INAF Guaranteed Time program designed to provide optical coverage of two 4 deg cosmic window…
A new search for variability-selected active galaxies within the VST SUDARE-VOICE survey: the Chandra Deep Field South and the SERVS-SWIRE area
S. Falocco, D. De Cicco, M. Paolillo +19
This work makes use of the VST observations to select variable sources. We use also the IR photometry, SED fitting and X-ray information where available to confirm the nature of th…
SUDARE-VOICE variability-selection of Active Galaxies in the Chandra Deep Field South and the SERVS/SWIRE region
S. Falocco, M. Paolillo, G. Covone +18
One of the most peculiar characteristics of Active Galactic Nuclei (AGN) is their variability over all wavelengths. This property has been used in the past to select AGN samples an…
Variability-selected Active Galactic Nuclei in the VST-SUDARE/VOICE Survey of the COSMOS Field
D. De Cicco, M. Paolillo, G. Covone +16
Optical variability has proven to be an effective way of detecting AGNs in imaging surveys, lasting from weeks to years. In the present work we test its use as a tool to identify A…