The Spin-X wide-field X-ray monitor of the Spectrum-X-Gamma astrophysical observatory
Pavlinsky, M. N. ; Grebenev, S. A. ; Mazov, P. A. ; Dekhanov, I. A. ; Ryvkin, D. B. ; Sunyaev, R. A. ; Surtaev, V. I. ; Mokrousov, N. V. ; Glushenko, A. G. ; Yampol’skii, S. I. ; Novikov, A. D.
Springer
Published 2000
Springer
Published 2000
| ISSN: |
1562-6873
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|---|---|
| Keywords: |
X-ray monitor ; gamma-ray bursts ; bursters ; Galactic center ; coded aperture
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| Source: |
Springer Online Journal Archives 1860-2000
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| Topics: |
Physics
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| Notes: |
Abstract The Spin-X wide-field X-ray monitor of the Spectrum-X-Gamma astrophysical observatory, which is based on the principle of a coded-aperture telescope, is designed to detect and localize cosmic gammaray-burst (GRB) sources; to survey large areas of the sky in search of new transients; and to carry out long-term observations of bright Galactic sources, including X-ray bursters. The monitor consists of two noncoaxial identical modules, Spin-X1 and Spin-X2, which together cover 6.8% of the sky. The high-apogee, four-day orbit of the Spectrum-XG satellite allows the instrument to be in observing mode more than 50% of the time. Having simulated the rate of GRB detection by Spin-X, we show that extrapolating BATSE 50–300-keV average data on the number of GRBs, their duration, and their mean energy spectrum to the X-ray energy band leads to disagreement with the observed detection rate of GRBs in the X-ray band. The number of GRBs that can be detected and localized with an accuracy r≤3′ (3σ) (the error-circle radius) by Spin-X is estimated to be ten bursts per year. We present data on the Spin-X sensitivity achievable during long-term observations of persistent and transient sources and on its sensitivity to X-ray bursts from Galactic sources in the 2–30-keV energy band.
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| Type of Medium: |
Electronic Resource
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| URL: |