Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001ap%26ss.276...39i&link_type=abstract
Astrophysics and Space Science, v. 276, Issue 1, p. 39-48 (2001).
Astronomy and Astrophysics
Astrophysics
Scientific paper
SIXE (Spanish Italian X-ray Experiment) is an X-ray detector with geometric area of 2300 cm^2, formed by four identical gas-filled Multicell Proportional Counters, and devoted to study the long term spectroscopy of selected X-ray sources in the energy range 3-50 keV. The main characteristics of SIXE are: time accuracy of 1 microsecond, spectral resolution of 5% for E > 35 keV and 46/√E% for E < 35 keV, continuum sensitivity (3σ in 10^5 s) of 2 × 10^-6 ph cm^-2 s^-1 keV^-1, and line sensitivity (3σ in 10^5 s) of 8 × 10^-6 ph cm^-2 s^-1. The size of the instruments and the requirements of the payload (weight 103 kg, full dimensions 660 × 660 × 450 mm^3, power budget < 60 W, on-board memory 2 Gbits, telemetry rate < 100 kbps) make this experiment fully compatible with the MINISAT platform. The main scientific goal of SIXE is the study of short and long term variability of some of the most important X-ray sources. To do that a few selected extragalactic and galactic X-ray sources will be selected to perform a dedicated and extensive monitoring program. The mission will provide in this way the unique opportunity for the study of X-ray sources with a temporal accuracy of 1 microsecond all through the time range 10^-5 :10^7 s.
Angulo Manuel
Bausells Joan
Bravo Eduardo
Cabestany Joan
Fernández-Valbuena Manuel
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