371 citations · 1.3k across the 28 of their papers we have counts for
28 papers
Large-amplitude modulations and hours-timescale variability in the early X-ray light curve of a tidal disruption flare
A. Malyali, A. Rau, P. Baldini +11
We present new X-ray, optical, and UV observations of the tidal disruption event candidate eRASSt J234402.9-352640, (hereafter J2344). Between 50 and 60 days after peak optical bri…
A systematic analysis of the radio properties of 22 X-ray selected tidal disruption event candidates with the Australia Telescope Compact Array
A. J. Goodwin, M. Burn, G. E. Anderson +7
We present a systematic analysis of the radio properties of an X-ray selected sample of tidal disruption event (TDE) candidates discovered by the eROSITA telescope. We find radio s…
The population of tidal disruption events discovered with eROSITA
Iuliia Grotova, Arne Rau, Pietro Baldini +13
This paper presents a systematic study of X-ray-selected canonical tidal disruption events (TDEs) discovered in the western Galactic hemisphere of the first two eROSITA all-sky sur…
CircleZ: Reliable Photometric redshifts for AGN computed using only photometry from Legacy Survey Imaging for DESI
A. Saxena, M. Salvato, W. Roster +25
(abridged)Photometric redshifts for AGN (galaxies hosting an accreting supermassive black hole in their center) are notoriously challenging and currently better computed via SED fi…
SDSS1335+0728: The awakening of a black hole
P. Sánchez-Sáez, L. Hernández-García, S. Bernal +22
The galaxy SDSS1335+0728, which had exhibited no prior optical variations during the preceding two decades, began showing significant nuclear variability in the Zwicky Transient Fa…
A Case for a Binary Black Hole System Revealed via Quasi-Periodic Outflows
Dheeraj R. Pasham, Francesco Tombesi, Petra Sukova +33
Binaries containing a compact object orbiting a supermassive black hole are thought to be precursors of gravitational wave events, but their identification has been extremely chall…
A radio flare associated with the nuclear transient eRASSt J234403-352640: an outflow launched by a potential tidal disruption event
A. J. Goodwin, G. E. Anderson, J. C. A. Miller-Jones +7
We present an extensive radio monitoring campaign of the nuclear transient eRASSt J234403-352640 with the Australia Telescope Compact Array, one of the most X-ray luminous TDE cand…
The more the merrier: SRG/eROSITA discovers two further galaxies showing X-ray quasi-periodic eruptions
R. Arcodia, Z. Liu, A. Merloni +20
X-ray quasi-periodic eruptions (QPEs) are a novel addition to the group of extragalactic transients. In this work, we report the discovery of two further galaxies showing QPEs, eRO…
The SRG/eROSITA all-sky survey: First X-ray catalogues and data release of the western Galactic hemisphere
A. Merloni, G. Lamer, T. Liu +142
The eROSITA telescope array aboard the Spektrum Roentgen Gamma (SRG) satellite began surveying the sky in December 2019, with the aim of producing all-sky X-ray source lists and sk…
A New Population of Mid-Infrared-Selected Tidal Disruption Events: Implications for Tidal Disruption Event Rates and Host Galaxy Properties
Megan Masterson, Kishalay De, Christos Panagiotou +14
Most tidal disruption events (TDEs) are currently found in time-domain optical and soft X-ray surveys, both of which are prone to significant obscuration. The infrared (IR), howeve…
Rapid evolution of the recurrence time in the repeating partial tidal disruption event eRASSt J045650.3-203750
Zhu Liu, Taeho Ryu, A. J. Goodwin +8
In this letter, we present the results from further X-ray and UV observations of the nuclear transient eRASSt J045650.3-203750 (hereafter J0456-20). We detected five repeating X-ra…
Transient fading X-ray emission detected during the optical rise of a tidal disruption event
A. Malyali, A. Rau, C. Bonnerot +9
We report on the SRG/eROSITA detection of ultra-soft ( eV) X-ray emission ( erg s) from the tidal disruptio…
Discovery of the luminous X-ray ignition eRASSt J234402.9352640; I. Tidal disruption event or a rapid increase in accretion in an active galactic nucleus?
D. Homan, M. Krumpe, A. Markowitz +17
In November 2020, a new, bright object, eRASSt J234402.9352640, was discovered in the second all-sky survey of SRG/eROSITA. The object brightened by a factor of at least 150 in…
The rebrightening of a ROSAT-selected tidal disruption event: repeated weak partial disruption flares from a quiescent galaxy?
A. Malyali, Z. Liu, A. Rau +11
The ROSAT-selected tidal disruption event (TDE) candidate RX J133157.6-324319.7 (J1331), was detected in 1993 as a bright (0.2-2 keV flux of erg s$^…
eRASSt J074426.3+291606: prompt accretion disc formation in a 'faint and slow' tidal disruption event
A. Malyali, Z. Liu, A. Merloni +10
We report on multi-wavelength observations of the tidal disruption event (TDE) candidate eRASSt J074426.3+291606 (J0744), located in the nucleus of a previously quiescent galaxy at…
X-ray detection of a nova in the fireball phase
Ole König, Jörn Wilms, Riccardo Arcodia +17
Novae are caused by runaway thermonuclear burning in the hydrogen-rich envelopes of accreting white dwarfs, which results in the envelope to expand rapidly and to eject most of its…
Live to die another day: the rebrightening of AT2018fyk as a repeating partial tidal disruption event
T. Wevers, E. R. Coughlin, D. R. Pasham +13
Stars that interact with supermassive black holes (SMBHs) can either be completely or partially destroyed by tides. In a partial tidal disruption event (TDE) the high-density core…
Deciphering the extreme X-ray variability of the nuclear transient eRASSt J045650.3-203750: A likely repeating partial tidal disruption event
Zhu Liu, A. Malyali, M. Krumpe +17
(Abridged) In this paper, we present the results of an exceptional repeating X-ray nuclear transient, eRASSt J045650.3-203750 (hereafter J0456-20), uncovered by SRG/eROSITA in a qu…
The eROSITA extragalactic CalPV serendipitous catalog
Teng Liu, Andrea Merloni, Julien Wolf +21
The eROSITA X-ray telescope on board the Spectrum-Roentgen-Gamma (SRG) observatory performed calibration and performance verification (CalPV) observations between September 2019 an…
Discovery of eRASSt J192932.9-560346: a bright, two-pole accreting, eclipsing polar
Axel Schwope, David A. H. Buckley, Adam Malyali +5
We report the discovery of a bright (V ~ 15), eclipsing, two-pole accreting magnetic cataclysmic variable (CV), a polar, as counterpart of the eROSITA and Gaia transients eRASSt 19…
The eROSITA Final Equatorial-Depth Survey (eFEDS): The variability catalogue and multi-epoch comparison
Th. Boller, J. H. M. M. Schmitt, J. Buchner +10
The 140 square degree Final Equatorial-Depth Survey (eFEDS) field, observed with the extended ROentgen Survey with an Imaging Telescope Array (eROSITA) aboard the Spectrum-Roentgen…
Systematic evaluation of variability detection methods for eROSITA
Johannes Buchner, Thomas Boller, David Bogensberger +5
The reliability of detecting source variability in sparsely and irregularly sampled X-ray light curves is investigated. This is motivated by the unprecedented survey capabilities o…
Establishing the X-ray Source Detection Strategy for eROSITA with Simulations
Teng Liu, Andrea Merloni, Johan Comparat +25
The eROSITA X-ray telescope on board the Spectrum-Roentgen-Gamma (SRG) satellite has started to detect new X-ray sources over the full sky at an unprecedented rate. Understanding t…
The eROSITA Final Equatorial-Depth Survey (eFEDS): Identification and characterization of the counterparts to the point-like sources
M. Salvato, J. Wolf, T. Dwelly +41
In November 2019, eROSITA on board of SRG observatory started to map the entire sky in X-rays. After the 4-year survey program, it will reach flux limits about 25 times deeper than…