A5076976454- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Pulsars and Gravitational Waves Research
- Astro and Planetary Science
- Particle Detector Development and Performance
- Astronomical Observations and Instrumentation
- Nuclear Physics and Applications
- Astronomy and Astrophysical Research
- Spacecraft Design and Technology
- Solar and Space Plasma Dynamics
- Stellar, planetary, and galactic studies
- Radiation Detection and Scintillator Technologies
- SAS software applications and methods
- Dark Matter and Cosmic Phenomena
- Geophysics and Gravity Measurements
- Satellite Communication Systems
- Particle Accelerators and Free-Electron Lasers
- Radio Astronomy Observations and Technology
- Galaxies: Formation, Evolution, Phenomena
- Spacecraft and Cryogenic Technologies
- Astrophysics and Star Formation Studies
- Radiation Therapy and Dosimetry
- Adaptive optics and wavefront sensing
- Medical Imaging Techniques and Applications
University College Dublin
2015-2024
Science North
2024
University of Alabama in Huntsville
2021
University of Delaware
2021
Universities Space Research Association
2021
University of Wisconsin–Madison
2021
Catholic University of America
2021
George Washington University
2021
University of Maryland, Baltimore County
2021
Clemson University
2021
Abstract We report the INTernational Gamma-ray Astrophysics Laboratory ( INTEGRAL ) detection of short gamma-ray burst GRB 170817A (discovered by Fermi -GBM) with a signal-to-noise ratio 4.6, and, for first time, its association gravitational waves (GWs) from binary neutron star (BNS) merging event GW170817 detected LIGO and Virgo observatories. The significance between observed is 3.2σ, while -GBM detections 4.2σ. was SPI-ACS instrument about 2 s after end GW event. measure fluence (1.4 ±...
We report on INTEGRAL observations of the soft $\gamma$-ray repeater SGR 1935+2154 performed between 2020 April 28 and May 3. Several short bursts with fluence $\sim10^{-7}-10^{-6}$ erg cm$^{-2}$ were detected by IBIS instrument in 20-200 keV range. The burst hardest spectrum, discovered localized real time Burst Alert System, was spatially temporally coincident a very bright radio CHIME STARE2 telescopes at 400-800 MHz 1.4 GHz, respectively. Its lightcurve shows three narrow peaks separated...
Using observations of the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL), we put upper limits on gamma-ray and hard X-ray prompt emission associated with gravitational wave event GW150914, discovered by LIGO/Virgo collaboration. The omni-directional view INTEGRAL/SPI-ACS has allowed us to constrain fraction energy emitted in electromagnetic component for full high-probability sky region LIGO trigger. Our fluence at time range from $F_{\gamma}=2 \times 10^{-8}$ erg cm$^{-2}$...
THESEUS, one of the two space mission concepts being studied by ESA as candidates for next M5 within its Comsic Vision programme, aims at fully exploiting Gamma-Ray Bursts (GRB) to solve key questions about early Universe, well becoming a cornerstone multi-messenger and time-domain astrophysics. By investigating first billion years Universe through high-redshift GRBs, THESEUS will shed light on main open issues in modern cosmology, such population primordial low mass luminosity galaxies,...
The Optical Monitoring Camera (OMC) will observe the optical emission from prime targets of gamma-ray instruments onboard ESA mission INTEGRAL, with support JEM-X monitor in X-ray domain. This capability provide invaluable diagnostic information on nature and physics sources over a broad wavelength range. Its main scientific objectives are: (1) to observed by gamma- instruments, measuring time intensity structure for comparison variability at high energies, (2) brightness position...
Context.Linear polarisation in gamma-ray burst prompt emission is an important diagnostic with the potential to significantly constrain models. The spectrometer aboard INTEGRAL, SPI, has capability detect signature of polarised from a bright γ-ray source. GRB 041219a most intense localised by INTEGRAL fluence 5.7 erg cm-2 over energy range 20 keV–8 MeV and ideal candidate for such study.
Tumor boundary delineation using positron emission tomography (PET) is a promising tool for radiation therapy applications. In this study we quantify the uncertainties in tumor as function of reconstruction method, smoothing, and lesion size head neck cancer patients FDG‐PET images evaluate dosimetric impact on radiotherapy plans. were acquired eight with GE Advance PET scanner. addition, diameter cylindrical phantom six FDG‐filled spheres volumes was imaged. scans reconstructed OSEM FBP...
Abstract The energy range between about 100 keV and 1 GeV is of interest for a vast class astrophysical topics. In particular, (1) it the missing ingredient understanding extreme processes in multi-messenger era; (2) allows localizing cosmic-ray interactions with background material radiation Universe, spotting reprocessing these particles; (3) last but not least, gamma-ray emission lines trace formation elements Galaxy beyond. addition, studying still largely unexplored MeV domain astronomy...
Context . Gamma-ray bursts (GRBs) are ideal probes of the Universe at high redshift (ɀ), pinpointing locations earliest star-forming galaxies and providing bright backlights with simple featureless power-law spectra that can be used to spectrally fingerprint intergalactic medium host galaxy during period reionization. Future missions such as Gamow Explorer (hereafter Gamow) being proposed unlock this potential by increasing rate identification high-ɀ (ɀ > 5) GRBs in order rapidly trigger...
The e-ASTROGAM is a gamma-ray space mission to be proposed as the M5 Medium-size of European Space Agency. It dedicated observation Universe with unprecedented sensitivity in energy range 0.2 - 100 MeV, extending up GeV energies, together groundbreaking polarization capability. designed substantially improve COMPTEL and Fermi sensitivities MeV-GeV open new windows opportunity for astrophysical fundamental physics research. will operate an astronomical observatory, core science focused on (1)...
The European Space Agency's INTErnational Gamma-Ray Astrophysics Laboratory (ESA/INTEGRAL) was launched aboard a Proton-DM2 rocket on 17 October 2002 at 06:41 CEST, from Baikonur in Kazakhstan. Since then, INTEGRAL has been providing long, uninterrupted observations (up to about 47 h, or 170 ksec, per satellite orbit of 2.7 days) with large field-of-view (FOV, fully coded: 100 deg2), millisecond time resolution, keV energy polarization measurements, as well additional wavelength coverage...
The spectrometer SPI, one of the two main instruments INTEGRAL spacecraft, offers significant gamma-ray burst detection capabilities. In its 35° (full width) field view SPI is able to localise bursts at a mean rate ~0.8/month. With large anticoincidence shield 512 kg BGO crystals detect quasi omni-directionally with very high sensitivity. Burst alerts are distributed by Alert System. first 8 months mission about 0.8/day candidates and 0.3/day positions were obtained interplanetary network...
A comprehensive temporal analysis has been performed on the 319 brightest GRBs with s from BATSE current catalog. The were denoised using wavelets and subjected to an automatic pulse selection algorithm as objective way of identifying pulses quantifying effects neighbouring pulses. number statistically significant selected sample was greater than 3000. rise times, fall full-widths at half-maximum (FWHM), amplitudes areas measured frequency distributions are presented here. All consistent...
A long and intense gamma-ray burst (GRB) was detected by INTEGRAL on July 11 2012 with a duration of ~115s fluence 2.8x10^-4 erg cm^-2 in the 20 keV-8 MeV energy range. GRB 120711A at z~1.405 produced soft emission (>20 keV) for least ~10 ks after trigger. The observed several ground-based telescopes that powerful optical flash peaking an R-band brightness ~11.5 mag ~126 s We present comprehensive temporal spectral analysis long-lasting 20-200 keV band INTEGRAL, Fermi/LAT post-GRB detection...
Gaia16aye was a binary microlensing event discovered in the direction towards northern Galactic disc and one of first events detected alerted to by Gaia space mission. Its light curve exhibited five distinct brightening episodes, reaching up I=12 mag, it covered great detail with almost 25,000 data points gathered network telescopes. We present photometric spectroscopic follow-up covering 500 days evolution. employed full Keplerian orbit model combined motion Earth around Sun reproduce...
Radiation damage of J-series silicon photomultipliers (SiPMs) has been studied in the context using these photodetectors future space-borne scintillation detectors. Several SiPM samples were exposed to 101.4 MeV protons, with 1 neutron equivalent fluence ranging from 1.27×108 neq/cm2 1.23×1010 neq/cm2. After irradiation, SiPMs experienced a large increase dark current and noise, which may pose problems for long-running space missions terms power consumption, thermal control detection...
We present the results from a high cadence, multi-wavelength observation campaign of AT 2016jbu (aka Gaia16cfr), an interacting transient. This dataset complements current literature by adding higher cadence as well extended coverage lightcurve evolution and late-time spectroscopic evolution. Photometric reveals that underwent significant photometric variability followed two luminous events, latter which reached absolute magnitude M$_V\sim$-18.5 mag. is similar to transient SN 2009ip whose...