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We present a detailed analysis of Jupiter's X-ray (0.2−10 keV) auroral emissions as observed over two XMM-Newton revolutions in Nov. 2003 and compare it with that of an earlier observation in Apr. 2003. We discover the existence of an electron bremsstrahlung component in the aurorae, which accounts for essentially all the X-ray flux above 2 keV: its(More)
For the fabrication of nanoparticle containing optical fibers by melt and draw technique, nanoparticle stability at high temperatures is a requirement. We report the synthesis of quantum dots at temperatures as high as 1000 °C, compatible with fiber drawing, stabilized for the first time by a prior low temperature heating step. It is observed that quantum(More)
Jupiter's X-ray aurora has been thought to be excited by energetic sulphur and oxygen ions precipitating from the inner magnetosphere into the planet's polar regions. Here we report high-spatial-resolution observations that demonstrate that most of Jupiter's northern auroral X-rays come from a 'hot spot' located significantly poleward of the latitudes(More)
I-V characteristics of PbSe nanoparticle/single crystal Si heterojunctions prepared by chemical bath deposition method show a rectifying behavior. With decrease in average PbSe grain size between 72 nm and 9 nm currents decrease for forward and reverse bias. C-V characteristics indicate that the junctions transform into that of a metal insulator(More)
We present the results of two XMM-Newton observations of Jupiter carried out in 2003 for 100 and 250 ks (or 3 and 7 planet rotations) respectively. X-ray images from the EPIC CCD cameras show prominent emission from the auroral regions in the 0.2−2.0 keV band: the spectra are well modelled by a combination of emission lines, including most prominently those(More)
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