O. Mcbrien
A5035276245- Particle Detector Development and Performance
- Distributed and Parallel Computing Systems
- Gamma-ray bursts and supernovae
- Scientific Computing and Data Management
- Astronomical Observations and Instrumentation
- Astrophysics and Cosmic Phenomena
- Astronomy and Astrophysical Research
- Pulsars and Gravitational Waves Research
- Astrophysical Phenomena and Observations
- Stellar, planetary, and galactic studies
- Neutrino Physics Research
- Solar and Space Plasma Dynamics
- Particle Accelerators and Free-Electron Lasers
- Particle physics theoretical and experimental studies
- Analytical Chemistry and Sensors
- Inertial Sensor and Navigation
- Mitochondrial Function and Pathology
- Nuclear Physics and Applications
- Ionosphere and magnetosphere dynamics
- Geophysics and Gravity Measurements
- Semiconductor Lasers and Optical Devices
- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Star Formation Studies
- Photonic and Optical Devices
- Advanced Research in Systems and Signal Processing
University of Warwick
2022
Queen's University Belfast
2017-2021
The Asteroid Terrestrial impact Last Alert System (ATLAS) system consists of two 0.5m Schmidt telescopes with cameras covering 29 square degrees at plate scale 1.86 arcsec per pixel. Working in tandem, the routinely survey whole sky visible from Hawaii (above $\delta > -50^{\circ}$) every nights, exposing four times night, typically reaching $o < 19$ magnitude exposure when moon is illuminated and $c 19.5$ dark skies. Construction underway further units to be sited Chile South Africa which...
The detection of the binary neutron star GW170817 together with observation electromagnetic counterparts across entire spectrum inaugurated a new era multi-messenger astronomy. In this study we incorporate wavelength-dependent opacities and emissivities calculated from atomic-structure data enabling us to model both measured lightcurves spectra transient AT2017gfo. Best-fits observational are obtained by Gaussian Process Regression, which allows present posterior samples for kilonova source...
We present the ATLAS discovery and initial analysis of first 18 days unusual transient event, ATLAS18qqn/AT2018cow. It is characterized by a high peak luminosity ($\sim$1.7 $\times$ 10$^{44}$ erg s$^{-1}$), rapidly evolving light curves ($>$5 mag rise to in $\sim$3.5 days), hot blackbody spectra, peaking at $\sim$27000 K that are relatively featureless unchanging over two weeks. The bolometric curve cannot be powered radioactive decay under realistic assumptions. detection high-energy...
Abstract We present observations of supernova (SN) 2017ens, discovered by the ATLAS survey and identified as a hot blue object through GREAT program. The redshift z = 0.1086 implies peak brightness M g −21.1 mag, placing within regime superluminous supernovae. observe dramatic spectral evolution, from initially being featureless, to later developing features similar those broadlined Type Ic SN 1998bw, finally showing ∼2000 km s −1 wide H α β emission. Relatively narrow Balmer emission...
Super-luminous supernovae (SLSNe) are rare events defined as being significantly more luminous than normal terminal stellar explosions. The source of the extra powering needed to achieve such luminosities is still unclear. Discoveries in local Universe (i.e. $z<0.1$) scarce, but afford dense multi-wavelength observations. Additional low-redshift objects therefore extremely valuable. We present early-time observations type I SLSN ASASSN-18km/SN~2018bsz. These data used characterise event and...
Context. Gravitational wave (GW) astronomy has rapidly reached maturity, becoming a fundamental observing window for modern astrophysics. The coalescences of few tens black hole (BH) binaries have been detected, while the number events possibly including neutron star (NS) is still limited to few. On 2019 August 14, LIGO and Virgo interferometers detected high-significance event labelled S190814bv. A preliminary analysis GW data suggests that was likely due merger compact binary system formed...
We present SN2018kzr, the fastest declining supernova-like transient, second only to kilonova, AT2017gfo. SN2018kzr is characterized by a peak magnitude of $M_r = -17.98$, bolometric luminosity ${\sim} 1.4 \times 10^{43}$erg s$^{\mathrm{-1}}$ and rapid decline rate $0.48 \pm 0.03$ mag day$^{\textrm{-1}}$ in $r$ band. The evolves too quickly be explained pure $^{\mathrm{56}}$Ni heating, necessitating inclusion an alternative powering source. Incorporating spin-down magnetized neutron star...
We present multi-wavelength follow-up observations of the ATLAS discovered faint Iax supernova SN 2020kyg that peaked at an absolute magnitude $M_g \approx -14.9 \pm 0.2$, making it another member population. The bolometric light curve requires only $\approx 7 \times 10^{-3}$ M$_{\odot}$ radioactive $^{56}$Ni, with ejected mass $M_{\rm ej} \sim 0.4$ and a low kinetic energy $E 0.05 0.02 10^{51}$ erg. construct homogeneous volume-limited sample 902 transients observed by within 100 Mpc during...
In order to identify the sources of observed diffuse high-energy neutrino flux, it is crucial discover their electromagnetic counterparts. To increase sensitivity detecting counterparts transient or variable by telescopes with a limited field view, IceCube began releasing alerts for single ( E ν > 60 TeV) detections sky localisation regions 1° radius in 2016. We used Pan-STARRS1 follow-up five these during 2016–2017 search any optical transients that may be related neutrinos. Typically...
Abstract We present the discovery and optical follow-up of faintest supernova-like transient known. The event (SN 2019gsc) was discovered in a star-forming host at 53 Mpc by ATLAS. A detailed multicolor light curve gathered with Pan-STARRS1 spectroscopy obtained Nordic Optical Telescope Gemini-North. spectra near maximum show narrow features low velocities 3000–4000 km s −1 , similar to extremely low-luminosity SNe 2010ae 2008ha, displays fast decline (Δ m 15 ( r ) = 0.91 ± 0.10 mag). 2008ha...
Time domain astronomy was revolutionised with the discovery of first kilonova, AT2017gfo, in August 2017 which associated gravitational wave signal GW170817. Since this event, numerous wide-field surveys have been optimising search strategies to maximise their efficiency detecting these fast and faint transients. With Panoramic Survey Telescope Rapid Response System (Pan-STARRS), we conducting a volume limited survey for intrinsically fading events distance $D\simeq200$ Mpc. Two promising...