Monetary Integration in Europe: The UK and the Euro

Bird, Graham

doi:10.1007/978-0-230-20918-3_13

Cited by 43 publications

(64 citation statements)

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“…All but one are associated (within 1 ) with at least one IBIS source ( Bird et al 2007). Above 600 keV, only the Crab Nebula, Cyg X-1, GRS 1915+105, and GRS 1758À258 are detected, with the former two still emitting above 2 MeV.…”

Section: Source Catalogmentioning

confidence: 99%

INTEGRALSPI All‐Sky View in Soft Gamma Rays: A Study of Point‐Source and Galactic Diffuse Emission

Bouchet

Jourdain

Roques

et al. 2008

ApJ

126

144

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We have processed the data accumulated with the INTEGRAL SPI instrument over 4 years ($51 Ms) to study the morphology of the Galactic ''diffuse'' emission in the 20 keV to 8 MeV energy range. To achieve this, we simultaneously derived an all-sky census of emitting sources and images of the Galactic ridge (GR) emission. In the central radian, the resolved point-source emission amounts to 88%, 91%, and 68% of the total in the 25Y50, 50Y100, and 100Y300 keV domains, respectively. We compare the spatial distribution of the GR emission with the distributions obtained from CO and near-IR maps and quantify our results through latitude and longitude profiles. Below 50 keV, the SPI data are better traced by the latter, supporting a stellar origin for this emission. Furthermore, we find that the GR emission spectrum follows a power law with a photon index $1.55 above 50 keV, while an additional component is required below that energy. This component shows a cutoff around 30 keV, reinforcing a stellar origin, as proposed by Krivonos et al. The component of the diffuse emission due to e AE annihilations is extracted simultaneously, leading to the determination of the related parameters (positronium flux and fraction). Specific discussion is devoted to the annihilation-line distribution, since significant emission is detected over a region as large as $80 ; $10 , potentially associated with the disk or halo surrounding the central regions of our Galaxy.

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Section: Source Catalogmentioning

confidence: 99%

INTEGRALSPI All‐Sky View in Soft Gamma Rays: A Study of Point‐Source and Galactic Diffuse Emission

Bouchet

Jourdain

Roques

et al. 2008

ApJ

126

144

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“…J12270 is initially discovered by RXTE (Revnivtsev et al 2004), and then re-discovered by INTEGRAL as a hard X-ray emitter (Bird et al 2007;Bird et al 2010). Follow-up optical spectroscopy (Masetti et al 2006;Pretorius 2009) revealed that J12270 is a binary system with a low-mass companion star, either a cataclysmic variable (CV) or a LMXB.…”

Section: Introductionmentioning

confidence: 99%

Multi-wavelength study of the first γ-ray emitting LMXB XSS J12270-4859

Saitou¹,

Tsujimoto²,

Ebisawa³

et al. 2012

AIP Conference Proceedings

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A multiwavelength strategy for identifying celestial γ-ray sources AIP Conf.Abstract. Fermi is discovering many new γ-ray sources, and 1FGL J1227.9-4852 is one of them. Recent studies suggest that this source is associated with the X-ray source XSS J12270-4859 (hereafter J12270), of which nature is poorly understood. In this paper, we show results of our Suzaku and RXTE X-ray observations which are partly simultaneous with near-infrared (NIR) observations using InfraRed Survey Facility (IRSF). We found that J12270 shows (1) no emission lines in the X-ray spectra, (2) unique rapid temporal variations in X-rays, and (3) almost simultaneous X-ray and NIR flares. To investigate its nature, we constructed a spectral energy distribution (SED) from radio to γ-rays. Because of the similarity of its SED with those of other microquasars, we propose that J12270 is a microquasar with a synchrotron jet, and also the first γ-ray emitting low-mass X-ray binary.

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“…We populate the Luminosity Diagram (see section 5) with a selected sample of NS LMXBs analysed in detail with INTEGRAL during last years plus a sample of bursters with persistent behaviour from the IBIS survey [8] and three bursters belonging to the Z type. The sample analysed and studied in detail individually is composed by bursters and atoll with different characteristics, most of them are located in Globular Cluster, some are transients and some are persistents: 4U 1608-522, 4U 1728-34, 4U 1722-30, 4U 1820-30, 4U 1812-12, XB 1832-330 and also 4U 1254-690.…”

Section: The Bursters Samplementioning

confidence: 99%

High energy behaviour of Neutron Star Low Mass X-ray binary systems seen by INTEGRAL

Tarana¹,

Bazzano²,

Ubertini³

2010

Proceedings of the Extreme Sky: Sampling the Universe Above 10 keV — PoS(extremesky2009)

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We report on the study of the high energy emission of Neutron Stars in Low Mass X-ray Binary systems performed with INTEGRAL. The X and Gamma behaviour of a selected sample of atoll sources has been monitored through the study of light curves in different energy bands, the construction of hardness-intesity diagrams, and extraction of spectra to discern the physical parameters dominating the spectral variations. We re-constructed the "Bursters Box" with the source analysed plus other persistent bursters and Z sources as revealed by the deep IBIS survey. This allows to compare amongst themselves the sources sample.

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Monetary Integration in Europe: The UK and the Euro

Cited by 43 publications

References 0 publications

INTEGRALSPI All‐Sky View in Soft Gamma Rays: A Study of Point‐Source and Galactic Diffuse Emission

INTEGRALSPI All‐Sky View in Soft Gamma Rays: A Study of Point‐Source and Galactic Diffuse Emission

Multi-wavelength study of the first γ-ray emitting LMXB XSS J12270-4859

High energy behaviour of Neutron Star Low Mass X-ray binary systems seen by INTEGRAL

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