منابع مشابه
The Swift X-ray Telescope
The Swift Gamma-Ray Explorer is designed to make prompt multiwavelength observations of Gamma-Ray Bursts (GRBs) and GRB afterglows. The X-ray Telescope (XRT) enables Swift to determine GRB positions with a few arcseconds accuracy within 100 seconds of the burst onset. The XRT utilizes a mirror set built for JET-X and an XMM-Newton/EPIC MOS CCD detector to provide a sensitive broad-band (0.2-10 ...
متن کاملTiming accuracy of the Swift X-Ray Telescope in WT mode
Context. The X-Ray Telescope (XRT) on board Swift was mainly designed to provide detailed position, timing and spectroscopic information on gamma-ray burst (GRB) afterglows. During the mission lifetime the fraction of observing time allocated to other types of source has been steadily increased. Aims. In this paper, we report on the results of the in-flight calibration of the timing capabilitie...
متن کاملDiscovery of an Extreme MeV Blazar with the Swift Burst Alert Telescope
The Burst Alert Telescope (BAT) onboard Swift detected bright emission from 15–195 keV from the source SWIFT J0746.3+2548 (J0746 in the following), identified with the optically-faint (R ∼ 19), z=2.979 quasar SDSS J074625.87+244901.2. Here we present Swift and multiwavelength observations of this source. The X-ray emission from J0746 is variable on timescales of hours to weeks in 0.5–8 keV and ...
متن کاملUltra-stable Segmented Telescope Sensing and Control Architecture
Large segmented space telescopes that can achieve 10^10 contrast are under consideration for both the Large Ultraviolet Optical Infra-Red (LUVOIR) and Habex mission studies. The key challenge for this type of architecture is how to achieve sufficient stability to support this level of contrast. This paper will survey a few emerging sensing and control architectures and associated technologies t...
متن کاملIceCube-Plus: An Ultra-High Energy Neutrino Telescope
While the first kilometer-scale neutrino telescope, IceCube, is under construction, alternative plans exist to build even larger detectors that will, however, be limited by a much higher neutrino energy threshold of 10 PeV or higher rather than 10 to 100 GeV. These future projects detect radio and acoustic pulses as well as air showers initiated by ultra-high energy neutrinos. As an alternative...
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ژورنال
عنوان ژورنال: Space Science Reviews
سال: 2005
ISSN: 0038-6308,1572-9672
DOI: 10.1007/s11214-005-5095-4