241 citations · 1.1k across the 63 of their papers we have counts for
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Chasing Gravitational Waves with the Cherenkov Telescope Array
Jarred Gershon Green, Alessandro Carosi, Lara Nava +563
The detection of gravitational waves from a binary neutron star merger by Advanced LIGO and Advanced Virgo (GW170817), along with the discovery of the electromagnetic counterparts…
Joint searches by FACT, H.E.S.S., MAGIC and VERITAS for VHE gamma-ray emission associated with neutrinos detected by IceCube
Fabian Schüssler, Halim Ashkar, Elisa Bernardini +11
The sources of the astrophysical flux of high-energy neutrinos detected by IceCube are still largely unknown, but searches for temporal and spatial correlation between neutrinos an…
Variability studies of active galactic nuclei from the long-term monitoring program with the Cherenkov Telescope Array
Guillaume Grolleron, Josefa Becerra González, Jonathan Biteau +13
Blazars are active galactic nuclei (AGN) with a relativistic jet oriented toward the observer. This jet is composed of accelerated particles which can display emission over the ent…
Dark matter searches in dwarf spheroidal galaxies with the Cherenkov Telescope Array
Francesco Gabriele Saturni, Michele Doro, Aldo Morselli +1
Dark matter (DM) is one of the major components in the Universe. However, at present its existence is still only inferred through indirect astronomical observations. DM particles c…
Modelling of highly extended Gamma-ray emission around the Geminga Pulsar as detected with H.E.S.S
A. M. W. Mitchell, S. Caroff
Geminga is an enigmatic radio-quiet gamma-ray pulsar located at a mere 250 pc distance from Earth. Extended very-high-energy gamma-ray emission around the pulsar has been detected…
Sensitivity of the Cherenkov Telescope Array to emission from the gamma-ray counterparts of neutrino events
O. Sergijenko, A. Brown, D. Fiorillo +6
We investigate the possibility of detection of the VHE gamma-ray counterparts to the neutrino astrophysical sources within the Neutrino Target of Opportunity (NToO) program of CTA…
Photohadronic Modelling of the 2010 Gamma-ray Flare from Mrk 421
A. Rosales de León, A. M. Brown, P. M. Chadwick
Blazars are a subclass of active galactic nuclei (AGN) that have a relativistic jet with a small viewing angle towards the observer. Recent results based on hadronic scenarios have…
Locating the gamma-ray emission region in the brightest Fermi-LAT Flat Spectrum Radio Quasars
Atreya Acharyya, Paula M. Chadwick, Anthony M. Brown
We present a temporal and spectral analysis of the gamma-ray flux from nine of the brightest flat spectrum radio quasars (FSRQs) detected with the Fermi Large Area Telescope (LAT)…
A search for Centaurus A-like features in the spectra of Fermi-LAT detected radio galaxies
Cameron B. Rulten, Anthony M. Brown, Paula M. Chadwick
Motivated by the detection of a hardening in the gamma-ray spectrum of the radio galaxy Centaurus A, we have analysed ~10 years of Fermi-LAT observations of 26 radio galaxies to se…
Axion Constraints from Quiescent Soft Gamma-ray Emission from Magnetars
Sheridan J. Lloyd, Paula M. Chadwick, Anthony M. Brown +2
Axion-like-particles (ALPs) emitted from the core of a magnetar can convert to photons in its magnetosphere. The resulting photon flux is sensitive to the product of the ALP-…
Reply to a comment on `Understanding the gamma-ray emission from the globular cluster 47 Tuc: evidence for dark matter?'
Anthony M. Brown, Thomas Lacroix, Sheridan Lloyd +2
Analysing 9 years of Fermi-LAT observations, we recently studied the spectral properties of the prominent globular cluster 47 Tuc (Brown et al. 2018). In particular, we investigate…
Constraining Axion Mass through Gamma-ray Observations of Pulsars
Sheridan J. Lloyd, Paula M. Chadwick, Anthony M. Brown
We analyze 9 years of PASS 8 -LAT data in the 60500 MeV range and determine flux upper limits (UL) for 17 gamma-ray dark pulsars as a probe of axions produced by…
The glow of annihilating dark matter in Omega Centauri
Anthony M. Brown, Richard Massey, Thomas Lacroix +3
Dark matter (DM) is the most abundant material in the Universe, but has so far been detected only via its gravitational effects. Several theories suggest that pairs of DM particles…
Fermi-LAT Observations of Extreme Spectral Variability in IC 310
Jamie Graham, Anthony Brown, Paula Chadwick
We investigate the physical mechanisms of high-energy gamma-ray emission from the TeV-emitting misaligned active galactic nucleus IC 310. Eight years of data from the Fermi Large A…
Gamma-rays from SS433: evidence for periodicity
Kajwan Rasul, Paula M. Chadwick, Jamie A. Graham +1
In this paper we present our study of the gamma-ray emission from the microquasar SS433. Integrating over 9 years of Fermi-LAT \textsc{pass8} data, we detect SS433 with a significa…
Gamma-ray emission from high Galactic latitude globular clusters
Sheridan J. Lloyd, Paula M. Chadwick, Anthony M. Brown
We analyse 8 years of PASS 8 Fermi-LAT data, in the 60 MeV - 300 GeV energy range, from 30 high Galactic latitude globular clusters. Six of these globular clusters are detected wit…
Understanding the -ray emission from the globular cluster 47 Tuc: evidence for dark matter?
Anthony M. Brown, Thomas Lacroix, Sheridan Lloyd +2
47 Tuc was the first globular cluster observed to be -ray bright, with the -rays being attributed to a population of unresolved millisecond pulsars (MSPs). Recent kinematic d…
Fermi-LAT high AGN and the Extragalactic Background Light
Thomas Armstrong, Anthony M. Brown, Paula M. Chadwick
Observations of distant gamma-ray sources are hindered by the presence of the extragalactic background light (EBL). In order to understand the physical processes that result in the…
Gamma-ray Novae: Rare or Nearby?
Paul J. Morris, Garret Cotter, Anthony M. Brown +1
Classical Novae were revealed as a surprise source of gamma-rays in Fermi LAT observations. During the first 8 years since the LAT was launched, 6 novae in total have been detected…
Discovery of a new extragalactic source population of energetic particles
Anthony M. Brown, Celine Bœhm, Jamie Graham +3
We report the discovery of a statistically significant hardening in the Fermi-LAT -ray spectrum of Centaurus A's core, with the spectral index hardening from $Γ_{1}=2.73 \pm 0.0…
Localising the gamma-ray emission region during the June 2014 outburst of 3C 454.3
Rosemary T. Coogan, Anthony M. Brown, Paula M. Chadwick
In May - July 2014, the flat spectrum radio quasar 3C 454.3 exhibited strong flaring behaviour. Observations with the Large Area Telescope detector on-board the Fermi Gamma-ray Spa…
Search for Dark Matter Annihilation in the Galactic Center with IceCube-79
IceCube Collaboration, M. G. Aartsen, K. Abraham +310
The Milky Way is expected to be embedded in a halo of dark matter particles, with the highest density in the central region, and decreasing density with the halo-centric radius. Da…
The Detection of Fermi AGN above 100 GeV using Clustering Analysis
Thomas Armstrong, Anthony M. Brown, Paula M. Chadwick +1
The density-based clustering algorithm DBSCAN has been applied to the Fermi Large Area Telescope (LAT) dataset of GeV events with ,…
-ray observations of extraterrestrial neutrino track event positions
Anthony M. Brown, Jenni Adams, Paula M. Chadwick
In this paper we report the results of a -ray study of IceCube's extraterrestrial neutrino candidates detected as track-like events. Using 70 months of Fermi-LAT observations, a…