A5059168769- Solar and Space Plasma Dynamics
- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Vector-Borne Animal Diseases
- Animal Disease Management and Epidemiology
- Calibration and Measurement Techniques
- Viral Infections and Vectors
- Agriculture and Farm Safety
- Advanced X-ray Imaging Techniques
- Radiation Therapy and Dosimetry
- T-cell and Retrovirus Studies
- Ionosphere and magnetosphere dynamics
- Solar Radiation and Photovoltaics
- Gamma-ray bursts and supernovae
- Virology and Viral Diseases
- Thermal Radiation and Cooling Technologies
- Color Science and Applications
- Electrohydrodynamics and Fluid Dynamics
- Structural Engineering and Vibration Analysis
- Planetary Science and Exploration
- Offshore Engineering and Technologies
- Astrophysical Phenomena and Observations
- Astronomical Observations and Instrumentation
- Geophysics and Gravity Measurements
- Crystallography and Radiation Phenomena
University of Burdwan
2022-2025
Marshall Space Flight Center
2024
Physical Research Laboratory
2020-2023
Indian Institute of Technology Gandhinagar
2021-2023
Abstract Host-seeking behavior of Culicoides species was examined from 2018 to 2019 in West Bengal, India, which elucidated diel activity, feeding success, attack rate, biting and preferential landing adult on the cattle. A comparative assessment done between light trap aspirator. The host-seeking experiment involved a substantial timeframe 297 h catch collections over 27 nights. number captured 1.3 times higher than aspirator collections. were oxystoma Kieffer peregrinus Kieffer, fulvus Sen...
Abstract Nanoflares are believed to be key contributors heating solar nonflaring active regions, though their individual detection remains challenging. This study uses a data-driven field-aligned hydrodynamic model examine nanoflare properties throughout the lifecycle of region (AR) 12758. We simulate coronal loop emissions, where each is heated by random nanoflares depending on parameters derived from photospheric magnetograms observed Solar Dynamics Observatory/Helioseismic and Magnetic...
The Solar X-ray Spectrometer (XSM) payload onboard Chandrayaan-2 provides disk-integrated solar spectra in the 1-15 keV energy range with an resolution of 180 eV (at 5.9 keV) and a cadence 1~second. During period from September 2019 to May 2020, covering minimum Cycle 24, it observed nine B-class flares ranging B1.3 B4.5. Using time-resolved spectroscopic analysis during these flares, we examined evolution temperature, emission measure, absolute elemental abundances four elements -- Mg, Al,...
Solar flares, with energies ranging over several orders of magnitude, result from impulsive release energy due to magnetic reconnection in the corona. Barring a handful, almost all microflares observed X-rays are associated solar active regions. Here we present, for first time, comprehensive analysis large sample quiet Sun soft by X-ray Monitor (XSM) on board Chandrayaan-2 mission during 2019-20 minimum. A total 98 having peak flux below GOES A-level were XSM observations spanning 76 days....
Small-scale impulsive events, known as nanoflares, are thought to be one of the prime candidates that can keep solar corona hot at its multi-million Kelvin temperature. Individual nanoflares difficult detect with current generation instruments; however, their presence inferred through indirect techniques such a Differential Emission Measure (DEM) analysis. Here we employ this technique investigate possibility nanoflare heating quiet during minimum cycle 24. During minimum, active regions...
Elements with low First Ionization Potential (FIP) are known to be three four times more abundant in active region loops of the solar corona than photosphere. There have been observations suggesting that this observed "FIP bias" may different other parts and such thus important understanding underlying mechanism. The Solar X-ray Monitor (XSM) on board Chandrayaan-2 mission carried out spectroscopic Sun soft X-rays during 2019-20 minimum, considered quietest minimum past century. These...
Abstract Knowledge gaps exist on the feeding pattern and host range of bluetongue virus vectors, Culicoides species, associated with livestock in India. Adult midges were trapped ultraviolet light traps at 13 household farms adjacent to human biotope. Host DNA was isolated from individual females ( n = 101; blood engorged‐82, gravid‐4 parous‐15) subjected PCR amplification targeting CytB 16S rRNA gene fragments followed by sequencing amplified samples. However, sequences only 71 individuals...
We have reviewed the first year of observations Solar X-ray Monitor (XSM) onboard Chandrayaan-2, and available multi-wavelength to complement XSM data, focusing on Dynamics Observatory AIA Hinode XRT, EIS observations. has provided disk-integrated solar spectra in 1--15 keV energy range, observing a large number microflares. present an analysis AR 12759 during its disk crossing. use new radiometric calibration find that quiescent core emission crossing distribution temperatures chemical...
Abstract The first ionization potential (FIP) bias, whereby elemental abundances for low-FIP elements in different coronal structures vary from their photospheric values and may also with time, has been widely studied. In order to study the temporal variation understand physical mechanisms giving rise FIP we have investigated hot cores of three active regions (ARs) using disk-integrated soft X-ray spectroscopic observations Solar Monitor on board Chandrayaan-2. Observations periods when only...
Abstract Nanoflares are thought to be one of the prime candidates that can heat solar corona its multimillion kelvin temperature. Individual nanoflares difficult detect with present generation instruments, but their presence inferred by comparing simulated nanoflare-heated plasma emissions observed emission. Using HYDRAD coronal loop simulations, we model emission from an X-ray bright point (XBP) Marshall Grazing Incidence Spectrometer (MaGIXS), along nearest available observations...
Abstract We present multiwavelength observations by Chandrayaan-2/Solar X-ray Monitor, Solar Dynamics Observatory/Atmospheric Imaging Assembly, and Hinode/X-Ray Telescope (XRT) of a B-class flare observed on 2021 February 25, originating from an active region (AR 12804) near the northwest limb. The microflare lasts for ∼30 minutes is composed hot loops reaching temperatures 10 MK. report excellent agreement (within 20%) average effective obtained at peak all three instruments, which have...
Abstract Spectroscopic observations in X-ray wavelengths provide excellent diagnostics of the temperature distribution solar flare plasma. The Solar Monitor (XSM) on board Chandrayaan-2 mission provides broadband disk-integrated soft spectral measurements energy range 1–15 keV with high resolution and time cadence. In this study, we analyze spectra three representative GOES C-class flares obtained XSM to investigate evolution various plasma parameters during course flares. Using consisting...
Abstract Bluetongue is a non‐contagious viral disease causing significant economic losses throughout the world. The bluetongue vectors Culicoides oxystoma and actoni , which play role in transmission of various pathogens, are distributed across different geographical realms. Adults minute size with wide phenotypic variation, so morphology‐based species identification severely constrained by preparatory time shortage taxonomic expertise. To make process rapid effective, specific primer was...
We present multi-wavelength observations by Chandrayaan-2/XSM, SDO/AIA and Hinode/XRT of a B-class flare observed on 25th February, 2021, originating from an active region (AR 12804) near the North-West limb. The microflare lasts for approx 30 mins is composed hot loops reaching temperatures 10 MK. report excellent agreement (within 20 percent) average effective obtained at peak all three instruments, which have different temperature sensitivities. XRT filter combination Be-thin Be-med...