activity
20092026
most citedThe evolution of the high-energy cut-off in the X-Ray spectrum of the GX 339-4 across a hard-to-soft transition

152 citations · 268 across the 10 of their papers we have counts for

collaborators

10 papers

astro-ph.HE2026

The strength of Type-C quasi-periodic oscillations in black hole X-ray binaries correlates with the jet inclination

F. M. Vincentelli, N. Bollemeijer, A. Veledina +10

X-ray quasi-periodic oscillations (QPOs) are a characteristic feature of low-mass X-ray binaries (LMXBs). These oscillations have been studied for decades and revealed a rich and c…

astro-ph.HE2025

Probing the Strong Gravity Region of Black Holes with eXTP

Qingcui Bu, Cosimo Bambi, Lijun Gou +42

We present the novel capabilities of the enhanced X-ray Timing and Polarimetry (eXTP) mission to study the strong gravity region around stellar-mass black holes in X-ray binary sys…

astro-ph.HE2025

Type I X-ray Burst Emission Reflected into the Eclipses of EXO 0748-676

Amy H. Knight, Jakob van den Eijnden, Adam Ingram +8

The neutron star X-ray binary, EXO 0748--676, was observed regularly by the Rossi X-ray Timing Explorer (RXTE) and XMM-Newton during its first detected outburst (1985 - 2008). Thes…

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.HE2023

A systematic study of the high-frequency bump in the black-hole low-mass X-ray binary GX 339-4

Yuexin Zhang, Mariano Méndez, Sara E. Motta +8

The high-frequency bump, characterized by a frequency exceeding ~30 Hz, represents a seldom-explored time-variability feature in the power density spectrum (PDS) of black-hole X-ra…

astro-ph.HE2023★ 39 cited

Highly Significant Detection of X-Ray Polarization from the Brightest Accreting Neutron Star Sco X-1

Fabio La Monaca, Alessandro Di Marco, Juri Poutanen +116

The Imaging X-ray Polarimetry Explorer (IXPE) measured with high significance the X-ray polarization of the brightest Z-source Scorpius X-1, resulting in the nominal 2-8 keV energy…

astro-ph.HE2015★ 19 cited

Spectral variability in Swift and Chandra observations of the Ultraluminous source NGC 55 ULX1

F. Pintore, P. Esposito, L. Zampieri +2

NGC 55 ULX1 is a bright Ultraluminous X-ray source located 1.78 Mpc away. We analysed a sample of 20 Swift observations, taken between 2013 April and August, and two Chandra observ…

astro-ph.HE2012

The aperiodic variability of the Ultraluminous X-ray source in NGC 5408

M. D. Caballero-Garcia, S. E. Motta, T. M. Belloni +1

Ultra-Luminous X-ray sources are accreting black holes that might represent strong evidence of the Intermediate Mass Black Holes (IMBH), proposed to exist by theoretical studies bu…

astro-ph.HE2010★ 57 cited

The spin and orbit of the newly discovered pulsar IGR J17480-2446

A. Papitto, A. D'Ai', S. Motta +5

We present an analysis of the spin and orbital properties of the newly discovered accreting pulsar IGR J17480-2446, located in the globular cluster Terzan 5. Considering the pulses…

astro-ph.HE2009★ 152 cited

The evolution of the high-energy cut-off in the X-Ray spectrum of the GX 339-4 across a hard-to-soft transition

S. Motta, T. Belloni, J. Homan

We report on X-ray observations of the black-hole candidate GX 339-4 during its 2006/2007 outburst. The hardness-intensity diagram of all RXTE/PCA data combined shows a q-shaped tr…