Observatoire Astronomique de Strasbourg - UMR 7550
11 rue de l'Université
67000 Strasbourg
France

Divya RAWAT

Postdoctorante
GALHECOS

divya.rawat@-Code to remove to avoid SPAM-astro.unistra.fr
bureau C7

Hi, I am Divya Rawat, currently a postdoctoral fellow in the Science Survey Center of the XMM-Newton project at the Observatoire Astronomique de Strasbourg, France. I completed my PhD at IIT Kanpur, India, followed by my first postdoc at the AstroSat Science Support Cell, IUCAA, India.

My research interests include the study of accretion disks in compact objects, the investigation of relativistic jets and their relationship with the accretion disk, accretion geometry, quasi-periodic oscillations and their connection to accretion, corona, and disk instability. I have utilized observations from X-ray observatories such as AstroSat, NICER, Swift, NuSTAR, and IXPE for my research. Additionally, I have experience with various data analysis software, including HeaSoft, LAXPC software, SXT pipeline, NICERDAS, GHATS (General High-Energy Aperiodic Timing Software), and NuSTARDAS.

Currently, I am contributing to updating the code for the Xcat-DB interface, which contains all the sources in the XMM archive sources catalog, extracted from more than 200 catalogs hosted primarily at CDS ( Strasbourg Astronomical Data Center).

My Orchid id: https://orcid.org/0000-0002-9280-2785

List of Publications:

Refreed:

Evolution of the Comptonizing medium of the black-hole candidate Swift J1727.8−1613 along the hard to hard-intermediate state transition using NICER, 2025, A&A 697, A229
Evolution of QPOs in GX 339–4 and EXO 1846–031 with Insight-HXMT and NICER, 2024, ApJL, 971, 2, 148
Unveiling the X-ray polarimetric properties of LMC X-3 with IXPE, NICER, and Swift/XRT, 2024, MNRAS, 531, 1, 585–591
Spectropolarimetric study of 4U 1630-47 in steep power-law state with IXPE and NICER , 2023, MNRAS, 525, 1, 661-666
Testing the dynamic origin of Quasi-periodic Oscillations in MAXI J1535-571 and H 1743-322 , 2023, MNRAS, 524, 4, 5869-5879.
Detection of X-Ray Polarized Emission and Accretion-disk Winds with IXPE and NICER in the Black Hole X-Ray Binary 4U 1630-47 , 2023, ApJL, 949 L43
Flux-resolved Spectropolarimetric Evolution of the X-Ray Pulsar Hercules X-1 Using IXPE , 2023, ApJL, 948, 1
A NICER look at the jet-like corona of MAXI J1535-571 through type-B quasi-periodic oscillations 2023, MNRAS, 520, 4
The comptonizing medium of the black hole X-ray binary MAXI J1535-571 through type-C quasi-periodic oscillations, 2023,MNRAS, 520, 1, 113–128.
The evolution of the corona in MAXI J1535-571 through type-C quasi-periodic oscillations with Insight-HXMT , 2022, MNRAS, 512, 2, 2686-2696
Time-resolved spectroscopy on the heartbeat state of GRS 1915+105 using AstroSat, 2022, MNRAS, 511, 2, 1841−1847
Testing Evolution of LFQPOs with Mass Accretion Rate in GRS 1915+105 with Insight-HXMT, 2021,ApJ, 909, 63
Identification of QPO Frequency of GRS 1915+105 as the Relativistic Dynamic Frequency of a Truncated Accretion Disk, 2020, ApJL, 889L, 36
Study of Timing Evolution from Nonvariable to Structured Large-amplitude Variability Transition in GRS 1915 + 105 Using AstroSat, 2019, ApJ, 870, 4
Extensive Broadband X-Ray Monitoring During the Formation of a Giant Radio Jet Base in Cyg X-3 with AstroSat, 2018 , ApJL, 853, 11.

Non-refereed/Conference Proceedings:

Contemporaneous X-ray and Optical Polarization of EHSP Blazar H 1426+428, 2025, arXiv:2504.12410
Exploring the origin of type-C Quasi-periodic Oscillations in black hole X-ray binaries, MAXI J1535-571 and H 1743-322, COSPAR-2024 Assembly, Busan, South Korea
Polarimetric Findings for the Black Hole X-ray Binary 4U 1630-47 using Imaging X-ray Polarimetry Explorer, COSPAR-2024 Assembly, Busan, South Korea
Soft Spectro-polarimetry of X-ray Binaries LMC X-3 and Her X-1: IXPE Insights and Future Prospects with XpoSat, COSPAR-2024 Assembly, Busan, South Korea
Study of comptonizing medium of BHXRB MAXI J1535−571 using time-dependent comptonization model, COSPAR-2022 Assembly, Athens, Greece
Corona evolution of MAXI J1535-571 revealed by type-C quasi-periodic oscillations observed with Insight-HXMT, COSPAR-2022 Assembly, Athens, Greece
Probing the heartbeat state of GRS 1915+105 with time-resolved spectroscopy using AstroSat, COSPAR-2022 Assembly, Athens, Greece
Rms-spectra study of Low-frequency QPOs in Black hole binary systems using NICER, COSPAR-2021 Assembly, Sydney, Australia
Identification of QuasiPeriodic Oscillations of a black hole system, COSPAR-2021 Assembly, Sydney, Australia
Study of Timing Evolution from Nonvariable to Structured Large-amplitude Variability Transition in GRS 1915+105 Using AstroSat/LAXPC, COSPAR-2018 Assembly, Pasadena

Non-Scientific Conference Proceedings:

My experience with Cospar Capacity Building and Cospar visiting fellowship, COSPAR-2021 Assembly, Sydney, Australia