X-Ray Astronomy Satellite Ginga
نویسندگان
چکیده
منابع مشابه
X-ray Spectral Characteristics of GINGA Gamma-Ray Bursts
We have investigated the spectral characteristics of a sample of bright γ-ray bursts detected with the γ-ray burst sensors aboard the satellite Ginga. This instrument employed a proportional and scintillation counter to provide sensitivity to photons in the 2 400 keV region and as such provided a unique opportunity to characterize the largely unexplored X-ray properties of γ-ray bursts. The pho...
متن کاملFluctuations in the diffuse X-ray background observed with Ginga
We present Ginga measurements of the spatial fluctuations in the diffuse X-ray background. When combined with earlier results, the new data constrain the extragalactic logN − log S relation in the 2–10 keV energy band to a form close to the Euclidean prediction over the flux range 10−10 − 5 × 10−13 erg cm−2 s−1. The normalisation of the 2–10 keV source counts is a factor 2−3 above that derived ...
متن کاملThe first simultaneous X-ray/γ-ray observations of Cyg X-1 by Ginga and OSSE
We present the results of 4 simultaneous observations of Cygnus X-1 by Ginga and OSSE. The X-ray/γray spectra can be described by an intrinsic continuum and a component due to Compton reflection including an iron Kα line. The intrinsic spectrum at X-ray energies is a power-law with a photon spectral index of Γ = 1.6. The intrinsic γ-ray spectrum can be phenomenologically described by either a p...
متن کاملX-ray Astronomy of Stellar Coronae ⋆
X-ray emission from stars in the cool half of the Hertzsprung-Russell diagram is generally attributed to the presence of a magnetic corona that contains plasma at temperatures exceeding 1 million K. Coronae are ubiquitous among these stars, yet many fundamental mechanisms operating in their magnetic fields still elude an interpretation through a detailed physical description. Stellar X-ray astr...
متن کاملX-ray Interferometry: Ultra High Resolution Astronomy
X-rays have tremendous potential for imaging at the highest angular resolution. The high surface brightness of many xray sources will reveal angular scales heretofore thought unreachable. The short wavelengths make instrumentation compact and baselines short. We discuss how practical x-ray interferometers can be built for astronomy using existing technology. We describe the Maxim Pathfinder and...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1990
ISSN: 0252-9211
DOI: 10.1017/s0252921100076880