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Possible detection of HFQPOs associated with 'unknown' variability class of GRS 1915+105
Seshadri Majumder, Santabrata Das, Anuj Nandi
We present a comprehensive spectro-temporal analysis of GRS observed with AstroSat during June, . A detailed study of the temporal properties reveals the appearanc…
Probing the accretion geometry of black hole X-ray binaries: A multi-mission spectro-polarimetric and timing study
Seshadri Majumder, Ankur Kushwaha, Swapnil Singh +3
We present a comprehensive spectro-polarimetric and timing analysis of twelve black hole X-ray binaries, namely Cyg X-1, 4U 1630-47, Cyg X-3, LMC X-1, 4U 1957+115, LMC X-3, Swift J…
Evidence of oscillating `compact' Comptonized corona in GRS 1915+105: Insights into HFQPOs with AstroSat
Sreehari Harikesh, Seshadri Majumder, Santabrata Das +1
We present, for the first time, an in-depth dynamical analysis of the spectro-temporal properties of the soft variability classes (, , , and ) of GRS 1915+105 during th…
Long-term evolution of BH-ULX candidates: An `unusual' - correlation associated with spectral states
Seshadri Majumder, Santabrata Das, Anuj Nandi
We present the long-term spectral evolution of eight black hole ultra-luminous X-ray sources (BH-ULXs), namely NGC1313 X-1, NGC5408 X-1, NGC6946 X-1, IC342 X-1, NGC55 ULX1, NGC4395…