X-ray properties of the Sun and some compact objects of our Galaxy

In the Thesis, I study the X-ray properties of the two major stages of the life cycle of the stars: one is the normal life of a lighter mass star (Sun) and another is the collapsed state (black hole) of a star (black hole candidates GRO J1655-40, GX 339-4 and GRBs). I am lucky to be a team member for developing X-ray solar space instruments RT-2 (S, G and CZT) which observed both the Sun and Gamma-Ray Bursts (GRBs) from space. A part of my Thesis contains development of RT-2 instruments, characterization of CZT & CMOS imaging detectors (used in RT-2/CZT instrument), some observational results of solar flares and GRBs. My Thesis also contains the detailed timing & spectral properties of the 2005 outburst of the well known Galactic black hole candidate GRO J1655-40 and initial rising phase of 2010 outburst of the transient Galactic stellar mass black hole candidate GX 339-4.

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