11 papers
Importance and Science Outcomes from the first XSPECT/XPoSat Workshop
Anuj Nandi, Rwitika Chatterjee, V. P. Shyam Prakash +49
This paper summarizes the science outcomes of the first Workshop on Data Analysis using observations from the XSPECT payload onboard the XPoSat, which brought together early-career…
Tracing the outburst decay of soft X-ray transients Aql X-1 and 4U 1608-52 with XSPECT
Rwitika Chatterjee, Vivek Kumar Agrawal, V. P. Shyam Prakash +2
XSPECT instrument on-board XPoSat mission is a soft X-ray spectrometer sensitive in the energy band 0.815 keV. XSPECT has observed several bright neutron star low mass X-ray bin…
X-ray Timing and Spectral studies of the bare AGN Mrk 110
Deblina Lahiri, K. Sriram, Vivek Kumar Agrawal
The origin of the soft X-ray excess below 2 keV in active galactic nuclei (AGNs) remains debated, with relativistic reflection from the inner accretion disk and warm Comptonization…
X-ray spectral and temporal evolution of atoll source 4U 1820-30 with AstroSat: detection of high frequency quasi-periodic oscillation
Subhasish Das, Vivek Kumar Agrawal, Parijat Thakur +4
AstroSat/LAXPC and SXT observed the persistent neutron star low-mass X-ray binary 4U 1820-30 between 2016 and 2022. During these observations, the hardness-intensity diagram (HID)…
XSPECT on-board XPoSat: Calibration and First Results
Rwitika Chatterjee, Koushal Vadodariya, Radhakrishna Vatedka +6
XPoSat is India's first X-ray spectro-polarimetry mission, consisting of two co-aligned instruments, a polarimeter (POLIX) and a spectrometer (XSPECT), to study the X-ray emission…
Accretion Geometry of the New Galactic Black Hole Candidate AT2019wey in the Hard State
Pragati Sahu, Swadesh Chand, Gulab C. Dewangan +3
We perform broadband spectral and timing studies of the Galactic low-mass black hole candidate AT2019wey using quasi-simultaneous NICER, Swift, and NuSTAR observations obtained in…