activity
20102026
most citedFalse periodicities in quasar time-domain surveys

298 citations · 2k across the 42 of their papers we have counts for

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Showing 2024Show all

7 papers · 1 filter

astro-ph.HE2024★ 5 cited

Simultaneous Optical and X-ray Detection of a Thermonuclear Burst in the 2024 Outburst of EXO 0748-676

Amy H. Knight, Lauren Rhodes, Douglas J. K. Buisson +5

The neutron star low-mass X-ray binary, EXO 0748--676, recently returned to outburst after a 16 year-long quiescence. Since its return, there has been a global effort to cap…

astro-ph.HE2024

A New Broadband Spectral State in the Ultraluminous X-ray Source Holmberg IX X-1

D. J. Walton, M. Bachetti, P. Kosec +12

We present a series of five new broadband X-ray observations of the ultraluminous X-ray source Holmberg IX X-1, performed by - and in coordination. The first…

astro-ph.HE2024

Exploring the case for hard-X-ray beaming in NGC 6946 X-1

Tobias Beuchert, Matthew J. Middleton, Roberto Soria +5

In order to understand the nature of super-Eddington accretion we must explore both the emission emerging directly from the inflow and its impact on the surroundings. In this paper…

astro-ph.HE2024★ 1 cited

Skipping a beat: discovery of persistent quasi-periodic oscillations associated with pulsed fraction drop of the spin signal in M51 ULX-7

Matteo Imbrogno, Sara Elisa Motta, Roberta Amato +24

The discovery of pulsations in (at least) six ultraluminous X-ray sources (ULXs) has shown that neutron stars can accrete at (highly) super-Eddington rates, challenging the standar…

astro-ph.HE2024

Detection of a Highly Ionized Outflow in the Quasi-periodically Erupting Source GSN 069

P. Kosec, E. Kara, L. Brenneman +8

Quasi-periodic eruptions (QPEs) are high-amplitude, soft X-ray bursts recurring every few hours, associated with supermassive black holes. Many interpretations for QPEs were propos…

astro-ph.HE2024

Absence of nebular He{\sc ii} 4686 constrains the UV emission from the Ultraluminous X-ray pulsar NGC~1313~X--2

Andrés Gúrpide, Noel Castro Segura, Roberto Soria +1

While much has been learned in recent decades about the X-ray emission of the extragalactic Ultraluminous X-ray sources (ULXs), their radiative output in the UV band remains poorly…