0000000000870800

AUTHOR

Olivier Godet

showing 3 related works from this author

The Mouse That Roared: A Superflare from the dMe Flare Star EV Lac Detected by Swift and Konus-Wind

2010

We report on a large stellar flare from the nearby dMe flare star EV Lac observed by the Swift and Konus-Wind satellites and the Liverpool Telescope. It is the first large stellar flare from a dMe flare star to result in a Swift trigger based on its hard X-ray intensity. Its peak f_X from 0.3--100 keV of 5.3x10^-8 erg/cm2/s is nearly 7000 times larger than the star's quiescent coronal flux, and the change in magnitude in the white filter is >4.7. This flare also caused a transient increase in EV Lac's bolometric luminosity (L_bol) during the early stages of the flare, with a peak estimated L_X/L_bol ~3.1. We apply flare loop hydrodynamic modeling to the plasma parameter temporal changes …

Astrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesFluxAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsLuminositylaw.inventionSettore FIS/05 - Astronomia E AstrofisicalawIonizationX-raysAstrophysics::Solar and Stellar AstrophysicsSolar and Stellar Astrophysics (astro-ph.SR)Astrophysics::Galaxy AstrophysicsPhysicsFlare starAstronomy and Astrophysicsastrofisica fisica stellare stars: activity stars: coronae stars: flare stars: individual: EV Lac stars: late-type X-rays: starsAstrophysics - Solar and Stellar AstrophysicsSpace and Planetary ScienceMagnitude (astronomy)Plasma parameterStellar PhysicAstrophysics::Earth and Planetary AstrophysicsSuperflareFlare
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The Athena X-ray Integral Field Unit: a consolidated design for the system requirement review of the preliminary definition phase

2023

The Athena X-ray Integral Unit (X-IFU) is the high resolution X-ray spectrometer, studied since 2015 for flying in the mid-30s on the Athena space X-ray Observatory, a versatile observatory designed to address the Hot and Energetic Universe science theme, selected in November 2013 by the Survey Science Committee. Based on a large format array of Transition Edge Sensors (TES), it aims to provide spatially resolved X-ray spectroscopy, with a spectral resolution of 2.5 eV (up to 7 keV) over an hexagonal field of view of 5 arc minutes (equivalent diameter). The X-IFU entered its System Requirement Review (SRR) in June 2022, at about the same time when ESA called for an overall X-IFU redesign (i…

X-IFU: The X-ray Integral Field UnitCosmology and Nongalactic Astrophysics (astro-ph.CO)The X-ray Integral Field Unit [X-IFU]Solar and stellar astrophysicsFOS: Physical sciences/dk/atira/pure/sustainabledevelopmentgoals/responsible_consumption_and_production[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]Settore FIS/05 - Astronomia E AstrofisicaX-raysSDG 7 - Affordable and Clean EnergyInstrumentation and Methods for Astrophysics (astro-ph.IM)Solar and Stellar Astrophysics (astro-ph.SR)High Energy Astrophysical Phenomena (astro-ph.HE)/dk/atira/pure/sustainabledevelopmentgoals/affordable_and_clean_energyAstrophysics of GalaxiesAthena: the advanced telescope for high energy astrophysicsAstronomy and AstrophysicsAstrophysics - Astrophysics of GalaxiesAstrophysical phenomenaSpace instrumentationAstrophysics - Solar and Stellar AstrophysicsHigh energySpace and Planetary ScienceAstrophysics of Galaxies (astro-ph.GA)[PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc]the advanced telescope for high energy astrophysics [Athena]Athena: the advanced telescope for high energy astrophysics · X-IFU: The X-ray Integral Field Unit · Space instrumentation · X-rays · ObservatoryObservatoryAstrophysics - Instrumentation and Methods for AstrophysicsAstrophysics - High Energy Astrophysical PhenomenaSDG 12 - Responsible Consumption and ProductionAstrophysics - Cosmology and Nongalactic Astrophysics
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GRB 061121: Broadband Spectral Evolution through the Prompt and Afterglow Phases of a Bright Burst

2007

Swift triggered on a precursor to the main burst of GRB 061121 (z=1.314), allowing observations to be made from the optical to gamma-ray bands. Many other telescopes, including Konus-Wind, XMM-Newton, ROTSE and the Faulkes Telescope North, also observed the burst. The gamma-ray, X-ray and UV/optical emission all showed a peak ~75s after the trigger, although the optical and X-ray afterglow components also appear early on - before, or during, the main peak. Spectral evolution was seen throughout the burst, with the prompt emission showing a clear positive correlation between brightness and hardness. The Spectral Energy Distribution (SED) of the prompt emission, stretching from 1eV up to 1MeV…

PhysicsBrightnessX-rays: individual (GRB 061121)Astrophysics::High Energy Astrophysical PhenomenaMolecular cloudAstrophysics (astro-ph)FOS: Physical sciencesAstronomy and AstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsRest frameAstrophysicsSpectral lineAfterglowlaw.inventionGamma Rays: BurstsTelescopeGamma Rays: Bursts; X-rays: individual (GRB 061121)Space and Planetary SciencelawSpectral energy distributionGamma-ray burstThe Astrophysical Journal
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