Dragana Ilić

Size, Shape, Density, and Atmospheric Limit of (50000) Quaoar Revealed from 14 years of Stellar Occultation

G. Margoti, F. Braga-Ribas, José Luis Ortiz, B. Sicardy et autres

Abstract We present results from 28 stellar occultations by the large trans-Neptunian object (50000) Quaoar registered between 2018 and 2025. By performing a joint analysis of this occultation dataset, along with nine other published events, we were able to fit an oblate …

br, fr, be, us, de, ru, es, tr, gb, it, cn, Namibie, in, ch, ae, ca, Égypte, gr, nz, cz, rs, cl, pl, il (code pays fourni par la source)

QhX Catalog of Coherent and Quasi-coherent Active Galactic Nucleus Variability from Vera C. Rubin LSST DP1

Andjelka B. Kovačević, Dragana Ilić, U. Meštrić, Milena Stanković Cerović et autres

Abstract Coherent and quasi-coherent variability in active galactic nuclei (AGN) can serve as a useful diagnostic of dynamical processes operating in the immediate environments of supermassive black holes. The time-domain capabilities of the Vera C. Rubin Observatory Legacy Survey of Space and …

rs, de, au, si, it, hr, cl, us, pt, ch, cn, gb, ca, be (code pays fourni par la source)

Size, shape, density, and atmospheric limit of (50000) Quaoar revealed from 14 years of stellar occultation

G. Margoti, F. Braga-Ribas, J Ortiz, Bruno Sicardy et autres

We present results from 28 stellar occultations by the large Trans-Neptunian Object (50000) Quaoar registered between 2018 and 2025. By performing a joint analysis of this occultation data-set, along with other 9 published events, we were able to fit an oblate ellipsoid …

AGN STORM 2. IV. Swift XRT and UVOT monitoring

Edward M. Cackett, J. M. Gelbord, Aaron J. Barth, Gisella De Rosa et autres

us, fr, gb, it, cn, il, mx, ca, de, rs, nl, cz, cl, br, dk (code pays fourni par la source)

Feature-driven anomaly flagging in obscured active galactic nucleus light curves with autoencoders

Natale De Bonis, D. De Cicco, S. Cavuoti, Y. Maruccia et autres

Aims . Active galactic nuclei (AGN) are among the most complex classes of astrophysical objects, displaying a wide range of variability and observational properties. Identifying unusual AGN is crucial for understanding the physical mechanisms behind their emission better and for discovering potentially …

it, rs, cl, us, de (code pays fourni par la source)

AGN STORM 2. III. A NICER view of Mrk 817

Ethan R. Partington, Edward M. Cackett, Erin Kara, Gerard A. Kriss et autres

us, fr, gb, it, cn, il, mx, ca, de, rs, cz, br, cl, dk (code pays fourni par la source)

A meta-learning framework for multitask reverberation mapping in active galactic nuclei

Aman N. Raju, Andjelka B. Kovačević, Dragana Ilić, Francesco Tombesi et autres

Context. The Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST) will observe active galactic nucleus (AGN) sky densities of ∼1000 − 4000 deg −2 , enabling massive photometric reverberation mapping from the continuum light curves. Aims. We develop a …

dk, rs, de, it, fr, cl (code pays fourni par la source)

Tidal disruption of a low-mass star in an active galactic nucleus as the origin of the PS16dtm outburst

Marzena Śniegowska, Bożena Czerny, Michal Zajaček, Valentina Rosa et autres

Context. The event PS16dtm, which occurred in the centre of the narrow-line Seyfert 1 (NLS1) galaxy SDSS J015804.75−005221.8 ( z = 0.080440), is one of the few candidates for a tidal disruption event in an already-accreting active galactic nucleus. Aims. We wish …

il, cz, pl, uz, si, de, rs (code pays fourni par la source)

An X-ray and optical spectral study of the changing-look narrow-line Seyfert 1 2MASX J0413-0050

A. Vietri, A. Tortosa, Dragana Ilić, S. Ciroi et autres

Active galactic nuclei (AGN) showing dramatic spectral and flux variations, either due to changes in the accretion rate (‘changing-state’ CS-AGN) of the supermassive black hole or in the line-of-sight column density (‘changing-obscuration’ CO-AGN), have been classified as changing-look AGN (CL-AGN). Here we …

it, de, rs, us, au, ch, cl, gb, fi (code pays fourni par la source)

VAR-PZ: Constraining the photometric redshifts of quasars using variability

S. Satheesh-Sheeba, R. J. Assef, T. Anguita, P. Sánchez-Sáez et autres

The Vera C. Rubin Observatory’s Legacy Survey of Space and Time (LSST) is expected to obtain observations of over ten million quasars. The survey’s exceptional cadence and sensitivity will enable a significant fraction of these objects to be monitored in the ugrizy …

us, cl, de, au, ar, es, ru, nl, it, pl, hr, jp, rs, br, ch, gb, ca (code pays fourni par la source)

Scalable and Robust Multiband Modeling of AGN Light Curves in Rubin-LSST

Weixiang Yu, John J. Ruan, Colin J. Burke, Roberto J. Assef et autres

Abstract The Vera C. Rubin Observatory’s Legacy Survey of Space and Time (LSST) will monitor tens of millions of active galactic nuclei (AGNs) for a period of 10 yr with an average cadence of 3 days in six broad photometric bands. This …

AGN STORM 2. XI. Spectroscopic Reverberation Mapping of the Hot Dust in Mrk 817

Hermine Landt, Benjamin D. Boizelle, M. S. Brotherton, Laura Ferrarese et autres

Abstract The AGN Space Telescope and Optical Reverberation Mapping (STORM) 2 campaign targeted Mrk 817 with intensive multiwavelength monitoring and found its soft X-ray emission to be strongly absorbed. We present results from 157 near-IR spectra with an average cadence of a …