tokens: We sincerely thank the referee for valuable comments and suggestions that improved the paper significantly. The research work at the Physical Research Laboratory is funded by the Department of Space, Government of India. The authors would like to thank all the members of the Suzaku team for their contributions to the instrument preparation, spacecraft operation, software development and in-orbit instrumental calibration. This research has made use of data obtained through the HEASARC Online Service, provided by NASA/GSFC, in support of NASA High Energy Astrophysics Programmes.
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