0000000001001530

AUTHOR

P. Ubertini

showing 5 related works from this author

IBIS: The Imager on-board INTEGRAL

2003

The IBIS telescope is the high angular resolution gamma-ray imager on-board the INTEGRAL Observatory, successfully launched from Baikonur (Kazakhstan) the 17th of October 2002. This medium size ESA project, planned for a 2 year mission with possible extension to 5, is devoted to the observation of the gamma-ray sky in the energy range from 3 keV to 10 MeV (Winkler 2001). The IBIS imaging system is based on two independent solid state detector arrays optimised for low ( 15-1000 keV) and high ( 0.175-10.0 MeV) energies surrounded by an active VETO System. This high efficiency shield is essential to minimise the background induced by high energy particles in the highly excentric out of van All…

X-ray transientAstrophysics::High Energy Astrophysical PhenomenaINTEGRAL ; IBIS ; Gamma-ray imagingUNESCO::ASTRONOMÍA Y ASTROFÍSICAlaw.inventionTelescopesymbols.namesakeOpticslawObservatoryGamma-ray imagingAngular resolutionCoded aperturePhysicsIbisbiologyINTEGRALbusiness.industryAstrophysics::Instrumentation and Methods for AstrophysicsGamma rayAstronomy and Astrophysicsbiology.organism_classification:ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia [UNESCO]Space and Planetary ScienceVan Allen radiation beltsymbolsIBISUNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogoniabusiness:ASTRONOMÍA Y ASTROFÍSICA [UNESCO]Astronomy & Astrophysics
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A Hard X-Ray View of Scorpius X-1 with INTEGRAL : Nonthermal Emission?

2006

We present here simultaneous INTEGRAL/RXTE observations of Sco X-1, and in particular a study of the hard X-ray emission of the source and its correlation with the position in the Z-track of the X-ray color-color diagram. We find that the hard X-ray (above about 30 keV) emission of Sco X-1 is dominated by a power-law component with a photon index of ~3. The flux in the power-law component slightly decreases when the source moves in the color-color diagram in the sense of increasing inferred mass accretion rate from the horizontal branch to the normal branch/flaring branch vertex. It becomes not significantly detectable in the flaring branch, where its flux has decreased by about an order of…

AccretionPhotonAstrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesFluxAstrophysicsAstrophysics01 natural sciencesneutron starsX-ray[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO]Position (vector)Accretion DisksStars: Neutron0103 physical sciencesX-Rays: StarsAstrophysics::Solar and Stellar Astrophysics010303 astronomy & astrophysicsPhysics[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph]010308 nuclear & particles physicsAstrophysics (astro-ph)DiagramAstronomy and AstrophysicsSense (electronics)Horizontal branchX-Rays: BinariesX-Rays: GeneralSpace and Planetary ScienceVertex (curve)accreting millisecondStars: Individual: Constellation Name: Scorpius X-1Order of magnitudeThe Astrophysical Journal
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INTEGRAL monitoring of the Black Hole candidate 1E 1740.7-2942

2004

The brightest persistent Galactic black hole candidate close to the Galactic Centre, 1E 1740.7-2942, has long been observed with INTEGRAL. In this paper, we report on the long-term hard X-ray monitoring obtained during the first year of observations as part of the Galactic Centre Deep Exposure. We discuss the temporal and spectral behaviours in different energy bands up to 250 keV, as well as the hardness-flux correlations.

Astrophysics::High Energy Astrophysical PhenomenaAstrophysics (astro-ph)FOS: Physical sciencesAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsAstrophysics::Galaxy Astrophysics
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ORIGIN: metal creation and evolution from the cosmic dawn

2012

Herder, Jan-Willem den et al.

HOT INTERGALACTIC MEDIUMUNIVERSEChemical evolutionMission7. Clean energy01 natural sciencesSpectral lineSettore FIS/05 - Astronomia E Astrofisica010303 astronomy & astrophysicsmedia_commonPhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)NUCLEOSYNTHESISCOSMIC cancer databaseClusters of galaxiesSatellite MissionEpoch (reference date)Astrophysics::Instrumentation and Methods for AstrophysicsFORESTGALAXIESGamma-ray burstsAstrophysics - Instrumentation and Methods for AstrophysicsAstrophysics - High Energy Astrophysical PhenomenaX-ray Mission Gamma-ray bursts Clusters of galaxies Warm-hot intergalactic medium Chemical evolutionWarm-hot intergalactic mediumAstrophysics - Cosmology and Nongalactic AstrophysicsAstrophysics and AstronomyStructure formationCosmology and Nongalactic Astrophysics (astro-ph.CO)Clusters of galaxiemedia_common.quotation_subjectAstrophysics::High Energy Astrophysical PhenomenaREDSHIFTFOS: Physical sciencesAstrophysics::Cosmology and Extragalactic AstrophysicsX-ray Mission Gamma-ray bursts Clusters of galaxies Warm-hot intergalactic medium Chemical evolutionABSORPTION-SPECTRA010309 opticsX-rayYIELDS0103 physical sciencesGamma-ray burstInstrumentation and Methods for Astrophysics (astro-ph.IM)X-ray; Mission; Gamma-ray bursts; Clusters of galaxies; Warm-hot intergalactic medium; Chemical evolutionAstronomyAstronomy and AstrophysicsRedshiftGalaxyUniverse13. Climate actionChemical evolution; Clusters of galaxies; Gamma-ray bursts; Mission; Warm-hot intergalactic medium; X-ray; Astronomy and Astrophysics; Space and Planetary ScienceSpace and Planetary ScienceGamma-ray burstCLUSTERSExperimental Astronomy
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Recent trends in the development of CdTe and CdZnTe semiconductor detectors for astrophysical applications

2010

Cadmium telluride (CdTe) and cadmium zinc telluride (CdZnTe) offer great promise as x-ray and gamma ray detectors. Due to the high detection efficiency, the good room temperature performance and the recent improvements on crystal growth technology, CdTe and CdZnTe detectors have obtained an increasing interest in the field of hard x-ray and gamma ray astronomy. In this paper, we report on the R&D activities on CdTe and CdZnTe detectors for high energy space instrumentation. Our group has been involved in the design of new multilayer hard x and soft gamma ray Laue lens telescopes and, in particular on the development of focal plane detectors based on CdTe and CdZnTe. Here we present the acti…

Semiconductor detectorX-ray and gamma ray spectroscopySettore FIS/01 - Fisica SperimentaleCdTe and CdZnTeImaging
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