output
19972026
most citedThe Swift X-ray Telescope

2.7k citations

Showing astro-ph.HEShow all

245 papers · 1 filter

astro-ph.HE2026

Constraints on the VHE counterpart of two binary black hole mergers observed by the MAGIC and CTAO LST-1 telescopes

K. Abe, S. Abe, J. Abhir +358

We present very-high-energy gamma-ray observations of two binary black hole merger candidates, GW240615_113620 and GW241125_010116, performed with the Major Atmospheric Gamma Imagi…

astro-ph.HE2026★ 1 cited

Source identification for the Swift-BAT 150-month hard X-ray catalog using soft X-ray observations

K. Imam, N. Torres-Alba, S. Marchesi +10

We present a comprehensive catalog of 251 potential counterparts for 250 unassociated hard X-ray sources detected in the Swift Burst Alert Telescope (BAT) 150-month hard X-ray surv…

astro-ph.HE2025★ 3 cited

Prospects for dark matter observations in dwarf spheroidal galaxies with the Cherenkov Telescope Array Observatory

K. Abe, S. Abe, J. Abhir +491

The dwarf spheroidal galaxies (dSphs) orbiting the Milky Way are widely regarded as systems supported by velocity dispersion against self-gravity, and as prime targets for the sear…

astro-ph.HE2025

Low-frequency spectra of neutron star + OB supergiant binaries: Does wind density drive persistent and flaring modes of accretion?

J. van den Eijnden, L. Sidoli, M. Díaz Trigo +10

Neutron star high-mass X-ray binaries are well-studied in wavebands between the infrared and hard X-rays. Their low-frequency millimeter and radio properties, on the other hand, re…

astro-ph.HE2025

The Scintillator Surface Detector of the Pierre Auger Observatory

The Pierre Auger Collaboration

Data collected so far by the Pierre Auger Observatory have enabled major advances in ultra-high energy cosmic ray physics and demonstrated that improved determination of masses of…

astro-ph.HE2025

Measuring the muon content of inclined air showers using AERA and the water-Cherenkov detectors of the Pierre Auger Observatory

The Pierre Auger Collaboration, A. Abdul Halim, P. Abreu +360

We present a novel approach for assessing the muon content of air showers with large zenith angles on a combined analysis of their radio emission and particle footprint. We use the…

astro-ph.HE2025★ 1 cited

Probing multi-band variability and mode switching in the candidate transitional millisecond pulsar 3FGL J1544.6-1125

Giulia Illiano, Francesco Coti Zelati, Arianna Miraval Zanon +20

We present the most extensive high-time resolution multi-band campaign to date on the candidate transitional millisecond pulsar (tMSP) 3FGL J1544.6-1125 in the sub-luminous disk st…

astro-ph.HE2025★ 1 cited

A Radio-quiet AGN as a candidate counterpart to neutrino event IceCube-200615A

F. McBride, N. Schettino, J. D. O'Brien +13

Follow-up observations of neutrino events have been a promising method for identifying sources of very-high-energy cosmic rays. Neutrinos are unambiguous tracers of hadronic intera…

astro-ph.HE2025★ 3 cited

A Multi-wavelength Characterization of the 2023 Outburst of MAXI J1807+132: Manifestations of Disk Instability and Jet Emission

Sandeep K. Rout, M. Cristina Baglio, Andrew Hughes +19

Several phenomenological aspects of low-luminosity neutron star transients, such as atolls, remain poorly understood. One such source, MAXI J1807+132, entered its latest outburst i…

astro-ph.HE2025★ 2 cited

Scaler rates from the Pierre Auger Observatory: a new proxy of solar activity

The Pierre Auger Collaboration, I. Bizzarri, C. Dionese +1

The modulation of low-energy galactic cosmic rays reflects interplanetary magnetic field variations and can provide useful information on solar activity. An array of ground-surface…

astro-ph.HE2025★ 1 cited

High energy time lags of Gamma Ray Bursts

C. Maraventano, G. Ghirlanda, L. Nava +5

Positive lags between the arrival time of different photon energies are commonly observed in Gamma-Ray Bursts (GRBs), where soft photons lag behind harder ones. However, some GRBs…

astro-ph.HE2025★ 7 cited

Joint Radiative and Kinematic Modelling of X-ray Binary Ejecta: Energy Estimate and Reverse Shock Detection

A. J. Cooper, J. H. Matthews, F. Carotenuto +6

Black hole X-ray binaries in outburst launch discrete, large-scale jet ejections which can propagate to parsec scales. The kinematics of these ejecta appear to be well described by…

astro-ph.HE2025★ 2 cited

Identification and characterisation of the gamma-ray counterpart of the transitional pulsar candidate CXOU J110926.4-650224

A. Manca, F. Coti Zelati, J. Li +9

Transitional millisecond pulsars (tMSPs) represent a crucial link between the rotation-powered and accretion-powered states of binary pulsars. During their active X-ray state, tMSP…

astro-ph.HE2025★ 5 cited

A search for the anomalous events detected by ANITA using the Pierre Auger Observatory

The Pierre Auger Collaboration, A. Abdul Halim, P. Abreu +374

A dedicated search for upward-going air showers at zenith angles exceeding and energies EeV has been performed using the Fluorescence Detector of the Pierre Aug…

astro-ph.HE2025★ 4 cited

Unveiling the origin of XMM-Newton soft proton flares II. Systematics in the proton spectral analysis

T. Mineo, V. Fioretti, S. Lotti +7

Low-energy protons entering the field of view of the XMM-Newton telescope scatter with the X-ray mirror surface and might reach the X-ray detectors on the focal plane. They manifes…

astro-ph.HE2025★ 6 cited

Energy-resolved pulse profile changes in V 0332+53: Indications of wings in the cyclotron absorption line profile

Antonino D'Aì, Dimitrios K. Maniadakis, Carlo Ferrigno +15

We aim to investigate the energy-resolved pulse profile changes of the accreting X-ray pulsar V 0332+53, focusing in the cyclotron line energy range, using the full set of availabl…

astro-ph.HE2025

Line detections in photospheric radius expansion bursts from 4U 1820-303

F. Barra, D. Barret, C. Pinto +3

Context: NICER (Neutron star Interior Composition ExploreR) is the instrument of choice for the spectral analysis of type I X-ray bursts, as it provides high throughput at X-ray CC…

astro-ph.HE2024★ 3 cited

Search for the multiwavelength counterparts to extragalactic unassociated Fermi γ-ray sources

Alberto Ulgiati, Simona Paiano, Fabio Pintore +7

Aims. In this paper, we searched for multi-wavelength (X-ray, optical and radio) counterparts to the unassociated gamma-ray sources (UGS) of the Fermi 4FGL-DR4 catalog. The main go…

astro-ph.HE2024★ 2 cited

Pulsating ultraluminous X-ray sources: modeling the thermal emission and polarization properties

S. Conforti, L. Zampieri, R. Taverna +4

Ultraluminous X-ray sources (ULXs) are enigmatic sources first discovered in the 1980s in external galaxies. They are characterized by their extraordinarily high X-ray luminosity,…

astro-ph.HE2024★ 4 cited

Effects of ultra-fast outflows on X-ray time lags in AGN

Yerong Xu, Ciro Pinto, Erin Kara +3

The time lag between soft and hard X-ray photons has been observed in many active galactic nuclei (AGN) and can reveal the accretion process and geometry around supermassive black…

astro-ph.HE2024

X-ray and Radio Campaign of the Z-source GX 340+0 II: the X-ray polarization in the normal branch

Yash Bhargava, Thomas D. Russell, Mason Ng +11

We present the first X-ray polarization measurement of the neutron star low-mass X-ray binary and Z-source, GX 3400, in the normal branch (NB) using a 200 ks observation with th…

astro-ph.HE2024★ 5 cited

Measuring the ICM velocity structure within the A3266 galaxy cluster

E. Gatuzz, J. Sanders, A. Liu +7

We present a detailed analysis of the velocity structure of the hot intracluster medium (ICM) within the A3266 galaxy cluster, including new observations taken between June and Nov…

astro-ph.HE2024★ 4 cited

Fast X-ray/IR observations of the black hole transient Swift~J1753.5--0127: from an IR lead to a very long jet lag

Alberto Ulgiati, Federico Maria Vincentelli, Piergiorgio Casella +16

We report on two epochs of simultaneous near-infrared (IR) and X-ray observations with a sub-second time resolution of the low mass X-ray binary black hole candidate Swift J1753.5-…

astro-ph.HE2024★ 3 cited

The restless population of bright X-ray sources of NCG 3621

A. Sacchi, M. Imbrogno, S. E. Motta +9

We report on the multi-year evolution of the population of X-ray sources in the nuclear region of NGC 3621 based on Chandra, XMM-Newton and Swift observations. Among these, two sou…