Matthew G. Baring
A5088268135- Gamma-ray bursts and supernovae
- Pulsars and Gravitational Waves Research
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Solar and Space Plasma Dynamics
- High-pressure geophysics and materials
- Particle Detector Development and Performance
- Radio Astronomy Observations and Technology
- Dark Matter and Cosmic Phenomena
- Superconducting Materials and Applications
- Nuclear Physics and Applications
- Astro and Planetary Science
- Ionosphere and magnetosphere dynamics
- Particle Accelerators and Free-Electron Lasers
- Geophysics and Gravity Measurements
- Atomic and Subatomic Physics Research
- Astronomical Observations and Instrumentation
- Laser-Plasma Interactions and Diagnostics
- Neutrino Physics Research
- Stellar, planetary, and galactic studies
- Astronomy and Astrophysical Research
- Earthquake Detection and Analysis
- Cosmology and Gravitation Theories
- Advanced X-ray and CT Imaging
- Magnetic confinement fusion research
Rice University
2016-2025
Universities Space Research Association
1996-2021
SLAC National Accelerator Laboratory
2008-2021
Kavli Institute for Particle Astrophysics and Cosmology
2008-2021
Istituto Nazionale di Fisica Nucleare
2021
Polytechnic University of Bari
2021
University of Johannesburg
2021
University of Perugia
2021
Institut National de Physique Nucléaire et de Physique des Particules
2021
Université de Montpellier
2021
This catalog summarizes 117 high-confidence ⩾0.1 GeV gamma-ray pulsar detections using three years of data acquired by the Large Area Telescope (LAT) on Fermi satellite. Half are neutron stars discovered LAT through periodicity searches in and radio around unassociated source positions. The pulsars evenly divided into groups: millisecond pulsars, young radio-loud radio-quiet pulsars. We characterize pulse profiles energy spectra derive luminosities when distance information exists. Spectral...
Gamma-ray bursts (GRBs) are highly energetic explosions signaling the death of massive stars in distant galaxies. The Burst Monitor and Large Area Telescope onboard Fermi Observatory together record GRBs over a broad energy range spanning about 7 decades gammaray energy. In September 2008, observed exceptionally luminous GRB 080916C, with largest apparent release yet measured. high-energy gamma rays to start later persist longer than lower photons. A simple spectral form fits entire...
The dramatic increase in the number of known gamma-ray pulsars since launch Fermi Gamma-ray Space Telescope (formerly GLAST) offers first opportunity to study a sizable population these high-energy objects. This catalog summarizes 46 high-confidence pulsed detections using six months data taken by Large Area (LAT), Fermi's main instrument. Sixteen previously unknown were discovered searching for signals at positions bright sources seen with LAT, or objects suspected be neutron stars based on...
We report on the observation of bright, long gamma-ray burst, GRB 090902B, by Gamma-ray Burst Monitor (GBM) and Large Area Telescope (LAT) instruments on-board Fermi observatory. This was one brightest GRBs to have been observed LAT, which detected several hundred photons during prompt phase. With a redshift z = 1.822, this burst is among most luminous Fermi. Time-resolved spectral analysis reveals significant power-law component in LAT data that distinct from usual Band model emission seen...
We present detailed observations of the bright short-hard gamma-ray burst GRB 090510 made with Gamma-ray Burst Monitor (GBM) and Large Area Telescope (LAT) on board Fermi observatory. is first detected by LAT that shows strong evidence for a deviation from Band spectral fitting function during prompt emission phase. The time-integrated spectrum fit sum $\Epeak = 3.9\pm 0.3$\,MeV, which highest yet measured, hard power-law component photon index $-1.62\pm 0.03$ dominates below...
Pulsars are rapidly-rotating, highly-magnetized neutron stars emitting radiation across the electromagnetic spectrum. Although there more than 1800 known radio pulsars, until recently, only seven were observed to pulse in gamma rays and these all discovered at other wavelengths. The Fermi Large Area Telescope makes it possible pinpoint through their gamma-ray pulsations. We report detection of 16 pulsars blind frequency searches using LAT. Most coincident with previously unidentified...
The observations of the exceptionally bright gamma-ray burst (GRB) 130427A by Large Area Telescope aboard Fermi Gamma-ray Space provide constraints on nature these unique astrophysical sources. GRB had largest fluence, highest-energy photon (95 GeV), longest γ-ray duration (20 hours), and one isotropic energy releases ever observed from a GRB. Temporal spectral analyses challenge widely accepted model that nonthermal high-energy emission in afterglow phase GRBs is synchrotron radiated...
We present observations of the young supernova remnant (SNR) RX J1713.7−3946 with Fermi Large Area Telescope (LAT). clearly detect a source positionally coincident SNR. The is extended best-fit extension 055 ± 004 matching size non-thermal X-ray and TeV gamma-ray emission from remnant. positional coincidence allow us to identify LAT SNR J1713.7−3946. spectrum can be described by very hard power law photon index Γ = 1.5 0.1 that coincides in normalization steeper H.E.S.S.-detected at higher...
Abstract We report the discovery of GRB 221009A, highest flux gamma-ray burst (GRB) ever observed by Fermi Gamma-ray Burst Monitor (Fermi-GBM). This has continuous prompt emission lasting more than 600 s, which smoothly transitions to afterglow visible in Fermi-GBM energy range (8 keV–40 MeV), and total energetics higher any other sample. By using a variety new existing analysis techniques we probe spectral temporal evolution 221009A. find no prior trigger time ( t 0 ; 2022 October 9 at...
Abstract We present 294 pulsars found in GeV data from the Large Area Telescope (LAT) on Fermi Gamma-ray Space Telescope. Another 33 millisecond (MSPs) discovered deep radio searches of LAT sources will likely reveal pulsations once phase-connected rotation ephemerides are achieved. A further dozen optical and/or X-ray binary systems colocated with also harbor gamma-ray MSPs. This catalog thus reports roughly 340 and candidates, 10% all known pulsars, compared to ≤11 before Fermi. Half...
We report on gamma-ray observations of the Crab Pulsar and Nebula using 8 months survey data with Fermi Large Area Telescope (LAT). The high quality light curve obtained ephemeris provided by Nancay Jodrell Bank radio telescopes shows two main peaks stable in phase energy. first peak leads pulse (281 \pm 12 21) mus, giving new constraints production site non-thermal emission pulsar magnetospheres. improved sensitivity unprecedented statistics afforded LAT enable precise measurement spectral...
Recent observations of supernova remnants (SNRs) hint that they accelerate cosmic rays to energies close ~10(15) electron volts. However, the nature particles produce emission remains ambiguous. We report SNR W44 with Fermi Large Area Telescope at between 2 x 10(8) volts and 3 x10(11) The detection a source morphology corresponding shell implies is produced by accelerated there. gamma-ray spectrum well modeled from protons nuclei. Its steepening above approximately 10(9) provides probe which...
The discovery of bright gamma-ray emission coincident with supernova remnant (SNR) W51C is reported using the Large Area Telescope (LAT) on board Fermi Gamma-ray Space Telescope. a middle-aged (~10^4 yr) intense radio synchrotron in its shell and known to be interacting molecular cloud. spatially extended, broadly consistent X-ray extent SNR W51C. energy spectrum 0.2-50 GeV band exhibits steepening toward high energies. luminosity greater than 1x10^{36} erg/s given distance constraint D>5.5...
Gamma-Ray Pulsar Bonanza Most of the pulsars we know about were detected through their radio emission; a few are known to pulse gamma rays but first at other wavelengths (see Perspective by Halpern ). Using Fermi Space Telescope, Abdo et al. (p. 840 , published online 2 July; see cover) report detection 16 previously unknown based on gamma-ray emission alone. Thirteen these coincide with unidentified sources, solving 30-year-old mystery identities. Pulsars fast-rotating neutron stars. With...
We report on the gamma-ray activity of blazar Mrk 501 during first 480 days Fermi operation. find that average LAT spectrum can be well described by a single power-law function with photon index 1.78 +/- 0.03. While we observe relatively mild flux variations Fermi-LAT (within less than factor 2), detect remarkable spectral variability where hardest observed within energy range is 1.52 0.14, and softest one 2.51 0.20. These unexpected changes do not correlate measured above 0.3GeV. In this...
We report on the observation of bright, long gamma-ray burst, GRB 090926A, by Gamma-ray Burst Monitor (GBM) and Large Area Telescope (LAT) instruments board \Fermi\ Space Telescope. 090926A shares several features with other bright LAT bursts. In particular, it clearly shows a short spike in light curve that is present all detectors see this turn suggests there common region emission across entire energy range. addition, while separate high-energy power-law component has already been...
GRB110721A was observed by the Fermi Gamma-ray Space Telescope using its two instruments Large Area (LAT) and Burst Monitor (GBM). The burst consisted of one major emission episode which lasted for ~24.5 seconds (in GBM) had a peak flux 5.7\pm0.2 x 10^{-5} erg/s/cm^2. time-resolved spectrum is best modeled with combination Band function blackbody spectrum. energy component initially 15\pm2 MeV, highest value ever detected in GRB. This measurement made possible combining GBM/BGO data LAT Low...
The Large Area Telescope on board the Fermi satellite observed a gamma-ray flare in Crab Nebula lasting for approximately nine days April of 2011. source, which at optical wavelengths has size ≈11 lt-yr across, doubled its flux within eight hours. peak photon was (186 ± 6) × 10−7 cm−2 s−1 above 100 MeV, corresponds to 30-fold increase compared average value. During flare, new component emerged spectral energy distribution, peaked an (375 26) MeV maximum. observations imply that emission...
We report on the first detection of GeV high-energy gamma-ray emission from a young supernova remnant with Large Area Telescope aboard Fermi Gamma-ray Space Telescope. These observations reveal source no discernible spatial extension detected at significance level 12.2$\sigma$ above 500 MeV location that is consistent position explosion occurred around 1680 in Cassiopeia constellation - A. The flux and spectral shape are scenario which originates relativistic particles accelerated shell this...
We present the observations of GRB090510 performed by Fermi Gamma-Ray Space Telescope and Swift observatory. This is a bright, short burst that shows an extended emission detected in GeV range. Furthermore, its optical initially rises, feature so far observed only long bursts, while X-ray flux initial shallow decrease, followed steeper decay. exceptional behavior enables us to investigate physical properties GRB outflow, poorly known bursts. discuss internal shock external models for...
The Vela pulsar is the brightest persistent source in GeV sky and thus traditional first target for new gamma-ray observatories. We report here on initial Fermi Large Area Telescope observations during verification phase pointed exposure early survey scanning. have used signal to verify timing angular resolution. high quality pulse profile, with some 32,400 pulsed photons at E>0.03 GeV, shows features, including structure as fine 0.3ms a distinct third peak, which shifts energy. examine...
The All-sky Medium Energy Gamma-ray Observatory (AMEGO) is a probe class mission concept that will provide essential contributions to multimessenger astrophysics in the late 2020s and beyond. AMEGO combines high sensitivity 200 keV 10 GeV energy range with wide field of view, good spectral resolution, polarization sensitivity. Therefore, key study astrophysical objects have unique signatures gamma-ray regime, such as neutron star mergers, supernovae, flaring active galactic nuclei....
Time-resolved spectroscopy is performed on eight bright, long gamma-ray bursts (GRBs) dominated by single emission pulses that were observed with the {\it Fermi Gamma-ray Space Telescope}. Fitting prompt radiation of GRBs empirical spectral forms such as Band function leads to ambiguous conclusions about physical model for radiation. Moreover, often inadequate fit data. The GRB spectrum therefore modeled two components consisting optically thin nonthermal synchrotron from relativistic...
We report on NICER observations of the Magnetar SGR~1935+2154, covering its 2020 burst storm and long-term persistent emission evolution up to $\sim90$ days post outburst. During first 1120~seconds taken April 28 00:40:58 UTC we detect over 217 bursts, corresponding a rate $>0.2$ bursts s$^{-1}$. Three hours later is at 0.008 s$^{-1}$, remaining comparatively low level thereafter. The $T_{90}$ duration distribution peaks 840~ms; waiting times next fit with log-normal an average 2.1 s. 1-10...