Feasibility of spectro-photometry in X-rays (SPHINX) from the moon |
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Authors: | Ritabrata Sarkar Sandip Kumar Chakrabarti |
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Institution: | (1) Indian Centre for Space Physics, 43 Chalantika, Garia Station Rd., Kolkata, 700084, India;(2) S.N. Bose National Centre for Basic Sciences, JD Block, Salt Lake, Kolkata, 700098, India |
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Abstract: | Doing space Astronomy on lunar surface has several advantages. We present here feasibility of an All Sky Monitoring Payload for Spectro-photometry
in X-rays (SPHINX) which can be placed on a lander on the moon or in a space craft orbiting around the moon. The Si–PIN photo-diodes
and CdTe crystals are used to detect solar flares, bright gamma bursts, soft gamma-ray repeaters from space and also X-ray
fluorescence (XRF) from lunar surface. We present the complete Geant4 simulation to study the feasibility of such an instrument
in presence of Cosmic Diffused X-Ray Background (CDXRB). We find that the signal to noise ratio is sufficient for moderate
to bright GRBs (above 5 keV), for the quiet sun (up to 100 keV), solar flares, soft gamma-ray repeaters, X-ray Fluorescence
(XRF) of lunar surface etc. This is a low-cost system which is capable of performing multiple tasks while stationed at the
natural satellite of our planet. |
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