30 citations · 113 across the 12 of their papers we have counts for
12 papers
Quiet, but not silent: Uncovering quiescent state properties of two transient High Mass X-ray binaries
Gayathri Raman, Varun, Pragati Pradhan +1
We present the first set of broadband spectral and timing studies of two transient X-ray pulsars, MXB 0656-072 and MAXI J1409-619 using NuSTAR observations conducted during quiesce…
NuSTAR investigation of X-ray variability and hard X-ray spectral properties in IGR J16320-4751 and IGR J16479-4514
Varun, Gayathri Raman
We present the results obtained from a comprehensive timing and spectral study of two high-mass X-ray binary sources using NuSTAR observations. These two sources, IGR J16320-4751 a…
Timing and spectral studies of Cen X-3 in multiple luminosity states using
Ritesh Bachhar, Gayathri Raman, Varun Bhalerao +1
We present the results of timing and spectral analysis of the HMXB pulsar, Cen X-3, with the help of observations carried out using the Large Area X-ray Proportional Counter (LAXPC…
AstroSat detection of a mHz QPO and cyclotron line in IGR J19294+1816 during the 2019 outburst
Gayathri Raman, Varun, Biswajit Paul +1
We present results from timing and spectral analysis of the HMXB X-ray pulsar IGR J19294+1816 observed using \asr during its recent Type-I outburst in October, 2019. AstroSat obser…
A comprehensive study of 2019-2020 flare of OJ 287 using AstroSat, Swift, and NuSTAR
Raj Prince, Gayathri Raman, Rukaiya Khatoon +5
OJ 287 is a well-studied binary black hole system, that occasionally exhibits bright X-ray and optical flares. Here we present a detailed spectral study of its second brightest X-r…
Thermonuclear X-ray bursts detected in Cyg X-2 using AstroSat/LAXPC
Jincy Devasia, Gayathri Raman, Biswajit Paul
We report the detection of 5 Type-1 thermonuclear X-ray bursts and one burst-like event in the neutron star LMXB source, Cyg X-2 using X-ray data obtained with the Large Area X-ray…
Can Kilonova Light curves be Standardized?
Rahul Kashyap, Gayathri Raman, Parameswaran Ajith
Binary neutron star mergers have been recently confirmed to be the progenitors of the optical transients kilonovae (KNe). KNe are powered by the radioactive decay of neutron-rich e…
Multitude of iron lines including a Compton scattered component in OAO 1657--415 detected with Chandra
Pragati Pradhan, Gayathri Raman, Biswajit Paul
We present a high resolution X-ray spectrum of the accreting X-ray pulsar, OAO 1657--415 with HETG+ACIS-S onboard \emph{Chandra},revealing the presence of a broad line component ar…
Fermi-Large Area Telescope observations of the brightest Gamma-ray flare ever detected from CTA 102
Raj Prince, Gayathri Raman, Joachim Hahn +2
We present a multi-wavelength study of the FSRQ CTA 102 using Fermi-LAT and simultaneous Swift-XRT/UVOT observations. The Fermi-LAT telescope detected one of the brightest flares f…
Observation of variable pre-eclipse dips and disk winds in the eclipsing LMXB XTE J1710-281
Gayathri Raman, Chandreyee Maitra, Biswajit Paul
We report the first detection of highly ionized Fe species in the X-ray spectrum of the eclipsing and dipping Low Mass X-ray Binary XTE J1710-281. Using archival Chandra and Suzaku…
X-ray and optical orbital modulation of EXO 0748-676: A co-variability study using XMM-Newton
Gayathri Raman, Biswajit Paul
We present a multi-wavelength timing study of the eclipsing low mass X-ray binary EXO 0748-676 (UY Vol) using XMM-Newton when the source was in a hard spectral state. The orbital o…
SALT observation of X-ray pulse reprocessing in 4U 1626-67
Gayathri Raman, Biswajit Paul, Dipankar Bhattacharya +1
We investigate optical reprocessing of X-rays in the LMXB pulsar 4U 1626-67 in its current spin-up phase using observations with Southern African Large Telescope (SALT), near-simul…