51 citations · 191 across the 51 of their papers we have counts for
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Is the Spin of the Black Hole in GX 339-4 Negative?
Andrzej A. Zdziarski, Srimanta Banerjee, Michal Szanecki +2
We have studied the accreting black hole binary GX 339--4 using two highly accurate broad-band X-ray data sets in very soft spectral states from simultaneous NICER and NuSTAR obser…
Spectro-temporal evolution of 4U 1702-429 using AstroSat-NICER
Suchismito Chattopadhyay, Ranjeev Misra, Soma Mandal +2
We present the broadband spectral and timing properties of the atoll source 4U 1702-429 using two observations of AstroSat with the second one having simultaneous NICER data. For b…
Probing Broadband Spectral Energy Distribution and Variability of Mrk\,501 in the low flux state
Javaid Tantry, Zahir Shah, Ranjeev Misra +2
We conducted a multi-wavelength analysis of the blazar Mrk\,501, utilizing observations from \emph{Astro}Sat (SXT, LAXPC), \emph{Swift-UVOT}, and \emph{Fermi-LAT} during the period…
Insights into the Long-Term Flaring Events of Blazar PKS 0805-07: A Multi-Wavelength Analysis over the 2009-2023 Period
Sikandar A. Dar, Zahir Shah, Ranjeev Misra +1
We conducted a comprehensive temporal and spectral study of the FSRQ PKS 0805-07 by using the broadband observations from the Fermi-LAT and Swift-XRT/UVOT instruments over the peri…
Multi-wavelength study of extreme high-energy peaked BL Lac (EHBL) source 1ES 0229200 using ultraviolet, X-ray and gamma-ray observations
Jyotishree Hota, Rukaiya Khatoon, Ranjeev Misra +1
We present a comprehensive analysis of the broadband spectral energy distribution (SED) of the extreme high-energy peaked BL Lac (EHBL) source, 1ES 0229200. Our study utilizes n…
Modelling the Energy-dependent broadband variability in the black-hole transient GX 339-4 using Astrosat and NICER
Hitesh Tanenia, Akash Garg, Ranjeev Misra +1
We present a spectro-timing analysis of the black hole X-ray transient GX 339-4 using simultaneous observations from Astrosat and NICER during the 2021 outburst period. The combine…
Exploring the broadband spectral and timing characteristics of GRS 1915+105 with AstroSat and NICER observations
Ruchika Dhaka, Ranjeev Misra, JS Yadav +1
In this study, we undertake a spectral-timing analysis of the black hole X-ray binary source GRS 1915+105 using simultaneous observations carried out by AstroSat (LAXPC and SXT) an…
AstroSat Observations of the Dipping Low Mass X-ray Binary XB 1254-690
Nilam R. Navale, Devraj Pawar, A. R. Rao +4
XB 1254-690 is a neutron star low-mass X-ray binary with an orbital period of 3.88 hrs, and it exhibits energy-dependent intensity dips, thermonuclear bursts, and flares. We presen…
X-Ray spectral and temporal properties of LMXB 4U 1608-52- observed with AstroSat and NICER
Sree Bhattacherjee, Ankur Nath, Biplob Sarkar +4
We report results from a detailed study of the neutron star X-ray binary, 4U 1608-52 using observations with {\it AstroSat} (LAXPC/SXT) and {\it NICER} during its 2016 and 2020 out…
Long term X-ray spectral variations of the Seyfert-1 galaxy Mrk 279
K. Akhila, Ranjeev Misra, Savithri H. Ezhikode +1
We present the results from a long term X-ray analysis of Mrk 279 during the period 2018-2020. We use data from multiple missions - AstroSat, NuSTAR and XMM-Newton, for the purpose…
Detection of simultaneous QPO triplets in 4U 1728-34 and constraining the neutron star mass and moment of inertia
Kewal Anand, Ranjeev Misra, J. S. Yadav +3
We report simultaneous detection of twin kHz and Hz quasi-periodic oscillations (QPOs) in the time-resolved analysis of the AstroSat/LAXPC observation of the neutron star…
Estimating the Jet Power from Broadband SED modeling of Mkn 501 for different particle distributions
Hritwik Bora, Rukaiya Khatoon, Ranjeev Misra +1
We consider the broadband spectral energy distribution of the high energy peaked (HBL) blazar Mkn 501 using -XRT/UVOT, NuSTAR and -LAT observations…
Time resolved spectroscopy of a GRS 1915+105 flare during its unusual low state using AstroSat
Sajad Boked, Bari Maqbool, V. Jithesh +3
Since its discovery in 1992, GRS 1915+105 has been among the brightest sources in the X-ray sky. However, in early 2018, it dimmed significantly and has stayed in this faint state…
Spectral and Timing evolution of GX 340+0 along its Z-track
Suchismito Chattopadhyay, Yashpal Bhulla, Ranjeev Misra +1
We present the results from spectral and timing study of the Z source GX 340+0 using AstroSat's SXT and LAXPC data. During the observation the source traced out the complete Z-trac…
What Is the Black Hole Spin in Cyg X-1?
Andrzej A. Zdziarski, Swadesh Chand, Srimanta Banerjee +6
We perform a detailed study of the black hole spin of Cyg X-1, using accurate broad-band X-ray data obtained in the soft spectral state by simultaneous NICER and NuSTAR observation…