Brajesh Kumar
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View article: Distinct Fe K Line Complexes in MAXI J1744−294 Revealed by XRISM High-resolution Spectroscopy
Distinct Fe K Line Complexes in MAXI J1744−294 Revealed by XRISM High-resolution Spectroscopy Open
The newly discovered Galactic transient MAXI J1744−294 went into its first X-ray outburst in 2025. We study the spectral properties of this source in the 2–10 keV energy band during this outburst using X-ray data from the XRISM satellite f…
View article: Discovery and analysis of afterglows from poorly localized GRBs with the Gravitational-wave Optical Transient Observer (GOTO) All-sky Survey
Discovery and analysis of afterglows from poorly localized GRBs with the Gravitational-wave Optical Transient Observer (GOTO) All-sky Survey Open
Gamma-ray bursts (GRBs), particularly those detected by wide-field instruments such as the Fermi/GBM, pose challenges for optical follow-up because of their large initial localization regions, leaving many GRBs without identified afterglow…
View article: EP241021a: A Months-duration X-Ray Transient with Luminous Optical and Radio Emission
EP241021a: A Months-duration X-Ray Transient with Luminous Optical and Radio Emission Open
We present the discovery of a peculiar X-ray transient, EP241021a, by the Einstein Probe (EP) mission and the results from multiwavelength follow-up observations. The transient was first detected with the Wide-field X-ray Telescope as an i…
View article: Multiwavelength Analysis of GRB 250101A: From Gamma-Ray Prompt Emission to Optical Afterglow
Multiwavelength Analysis of GRB 250101A: From Gamma-Ray Prompt Emission to Optical Afterglow Open
The interaction between the relativistic jet and the circumburst medium produces a multiwavelength afterglow of a gamma-ray burst (GRBs). In this work, we present multiwavelength properties of GRB 250101A based on the observations of Swift…
View article: Distinct Fe-K Line Complexes in MAXI J1744-294 Revealed by XRISM High-Resolution Spectroscopy
Distinct Fe-K Line Complexes in MAXI J1744-294 Revealed by XRISM High-Resolution Spectroscopy Open
The newly discovered Galactic transient MAXI J1744-294 went into its first X-ray outburst in 2025. We study the spectral properties of this source in the 2-10 keV energy band during this outburst using X-ray data from the XRISM satellite f…
View article: Natural Field Parasitization of Groundnut Leaf Miner, Aproaerema modicella (Deventer) and Influence by Weather Parameters in Rainfed Groundnut Ecosystem
Natural Field Parasitization of Groundnut Leaf Miner, Aproaerema modicella (Deventer) and Influence by Weather Parameters in Rainfed Groundnut Ecosystem Open
Background: Groundnut (Arachis hypogea L.) is one of the most important oilseed crops in India, playing a crucial role in the country’s economy. This crop is vulnerable to various insect pests starting from vegetative to maturity phase, of…
View article: SN 2024aecx: A double-peaked rapidly evolving Type IIb supernova at 11 Mpc
SN 2024aecx: A double-peaked rapidly evolving Type IIb supernova at 11 Mpc Open
We present the results of low-resolution spectroscopic and densely sampled multi-band photometric follow-up of supernova (SN) 2024aecx. The SN was discovered in the spiral galaxy NGC 3521 (distance $\sim$11 Mpc) within a day after the expl…
View article: Efficacy, Tolerability and Adverse Effects of Triple Fixed Dose Combination Brimonidine–Brinzolamide–Timolol Ophthalmic Suspension in Primary Open Angle Glaucoma: A Retrospective Study
Efficacy, Tolerability and Adverse Effects of Triple Fixed Dose Combination Brimonidine–Brinzolamide–Timolol Ophthalmic Suspension in Primary Open Angle Glaucoma: A Retrospective Study Open
Purpose: To evaluate the efficacy and tolerability of recently introduced triple fixed dose combination (TFC) of brimonidine–brinzolamide–timolol (BBTFC) in patients with primary open angle glaucoma (POAG). Materials and Methods: A retrosp…
View article: Multiwavelength Analysis of GRB 250101A: From Gamma-ray Prompt Emission to Optical Afterglow
Multiwavelength Analysis of GRB 250101A: From Gamma-ray Prompt Emission to Optical Afterglow Open
The interaction between the relativistic jet and the circumburst medium produces a multiwavelength afterglow of a gamma-ray burst (GRBs). In this work, we present multiwavelength properties of GRB~250101A based on the observations of Swift…
View article: Double-frequency Nd:YAG laser reduction of peripheral iridotomy size for treatment of visual symptoms
Double-frequency Nd:YAG laser reduction of peripheral iridotomy size for treatment of visual symptoms Open
Peripheral iridotomy is a standard treatment for conditions like primary angle-closure glaucoma. However, the associated visual symptoms, such as glare and dysphotopsia, often reduce patient satisfaction. This article presents a novel surg…
View article: <tt>PyLMT</tt>: A transient detection pipeline for the 4-m International Liquid Mirror Telescope
PyLMT: A transient detection pipeline for the 4-m International Liquid Mirror Telescope Open
The International Liquid Mirror Telescope (ILMT) is a 4-m aperture, zenith-pointing telescope with a field-of-view of 22′, situated in the foothills of the Himalayas. The telescope operates in continuous survey mode, making it a useful ins…
View article: PyLMT: A transient detection pipeline for the 4-m International Liquid Mirror Telescope
PyLMT: A transient detection pipeline for the 4-m International Liquid Mirror Telescope Open
The International Liquid Mirror Telescope (ILMT) is a 4-m aperture, zenith-pointing telescope with a field-of-view of 22', situated in the foothills of the Himalayas. The telescope operates in continuous survey mode, making it a useful ins…
View article: Simultaneous Multiband Photometry of the Early Optical Afterglow of GRB 240825A with Mephisto
Simultaneous Multiband Photometry of the Early Optical Afterglow of GRB 240825A with Mephisto Open
Gamma-ray bursts (GRBs) are the most luminous transients in the Universe. The interaction of the relativistic jet with the circumburst medium produces an afterglow and generates multiwavelength emission. In this work, we present simultaneo…
View article: Using Images to Find Context-Independent Word Representations in Vector Space
Using Images to Find Context-Independent Word Representations in Vector Space Open
Many methods have been proposed to find vector representation for words, but most rely on capturing context from the text to find semantic relationships between these vectors. We propose a novel method of using dictionary meanings and imag…
View article: The Nature of Optical Afterglows Without Gamma-ray Bursts: Identification of AT2023lcr and Multiwavelength Modeling
The Nature of Optical Afterglows Without Gamma-ray Bursts: Identification of AT2023lcr and Multiwavelength Modeling Open
In the past few years, the improved sensitivity and cadence of wide-field optical surveys have enabled the discovery of several afterglows without associated detected gamma-ray bursts (GRBs). We present the identification, observations, an…
View article: Dataset of inertial measurements for writing Punjabi characters using IMU sensors
Dataset of inertial measurements for writing Punjabi characters using IMU sensors Open
This study introduces a comprehensive methodology for gathering datasets to recognize handwritten Punjabi alphabets, utilizing Inertial Measurement Units (IMUs) to capture the dynamic movement patterns inherent in handwriting. The approach…
View article: Unravelling the Asphericities in the Explosion and Multifaceted Circumstellar Matter of SN 2023ixf
Unravelling the Asphericities in the Explosion and Multifaceted Circumstellar Matter of SN 2023ixf Open
We present a detailed investigation of photometric, spectroscopic, and polarimetric observations of the Type II SN 2023ixf. Earlier studies have provided compelling evidence for a delayed shock breakout from a confined dense circumstellar …
View article: $Mesiri$:Mephisto Early Supernovae Ia Rapid Identifier
$Mesiri$:Mephisto Early Supernovae Ia Rapid Identifier Open
The early time observations of Type Ia supernovae (SNe Ia) play a crucial role in investigating and resolving longstanding questions about progenitor stars and the explosion mechanisms of these events. Colors of supernovae (SNe) in the ini…
View article: Peering into the Heart of the Giant Molecular Cloud G148.24+00.41: A Deep Near-infrared View of the Newly Hatched Cluster FSR 655
Peering into the Heart of the Giant Molecular Cloud G148.24+00.41: A Deep Near-infrared View of the Newly Hatched Cluster FSR 655 Open
We present a detailed near-infrared study of an embedded cluster located in the hub of the giant molecular cloud G148.24+00.41 of mass ∼10 5 M ⊙ , with the TANSPEC instrument mounted on the 3.6 m Devasthal Optical Telescope. The hub is loc…
View article: Peering into the Heart of the Giant Molecular Cloud G148.24+00.41: A Deep Near-infrared View of the Newly Hatched Cluster FSR 655
Peering into the Heart of the Giant Molecular Cloud G148.24+00.41: A Deep Near-infrared View of the Newly Hatched Cluster FSR 655 Open
We present a detailed near-infrared study of an embedded cluster located in the hub of the giant molecular cloud G148.24+00.41 of mass $\sim$10$^5$ $M_\odot$, with the TANSPEC instrument mounted on the 3.6 m Devasthal Optical Telescope. Th…
View article: Influence of Organic-Inorganic Interaction on Nutrient Use Efficiency and Sugarcane Yield in Calcareous Soils of the Indo-Gangetic Plains, India
Influence of Organic-Inorganic Interaction on Nutrient Use Efficiency and Sugarcane Yield in Calcareous Soils of the Indo-Gangetic Plains, India Open
The current study aims to evaluate integrated nutrient management on cane production and nutrient use efficiency of applied nitrogen, phosphorous, and potassium in sugarcane in terms of agronomic efficiency and physiological use efficiency…
View article: Analysis of sociodemographic profile of glaucoma patients with risk factors, subtypes, and disease severity in a tertiary eye care facility in Northern India
Analysis of sociodemographic profile of glaucoma patients with risk factors, subtypes, and disease severity in a tertiary eye care facility in Northern India Open
Purpose: To study the different subtypes of glaucoma and to analyze the demographic and clinical profile of glaucoma patients along with associated risk factors in a multi-locational North Indian study. Methods: Newly diagnosed and known g…
View article: Optimizing Growth and Yield of Cluster Bean (Cyamopsis tetragonoloba L.) Var. Neelam-61 through Integrated Use of Inorganic Fertilizers, Organic Manure and Rhizobium Inoculation
Optimizing Growth and Yield of Cluster Bean (Cyamopsis tetragonoloba L.) Var. Neelam-61 through Integrated Use of Inorganic Fertilizers, Organic Manure and Rhizobium Inoculation Open
Organic matter decomposition is beneficial to plant growth and development. However, the overuse of chemical fertilizers poses risks to environmental sustainability and long-term soil health. The integration of organic fertilizers, such as…
View article: Early-phase Simultaneous Multiband Observations of the Type II Supernova SN 2024ggi with Mephisto
Early-phase Simultaneous Multiband Observations of the Type II Supernova SN 2024ggi with Mephisto Open
We present early-phase good-cadence (hour-to-day) simultaneous multiband ( ugi and vrz bands) imaging of the nearby supernova SN 2024ggi, which exploded in the nearby galaxy NGC 3621. A quick follow-up was conducted within less than a day …
View article: Multiband Simultaneous Photometry of Type II SN 2023ixf with Mephisto and the Twin 50 cm Telescopes
Multiband Simultaneous Photometry of Type II SN 2023ixf with Mephisto and the Twin 50 cm Telescopes Open
SN 2023ixf, recently reported in the nearby galaxy M101 at a distance of 6.85 Mpc, was one of the closest and brightest core-collapse supernovae in the last decade. In this work, we present multiwavelength photometric observation of SN 202…
View article: Investigation of Phase Shift and Travel Time of Acoustic Waves in the Lower Solar Atmosphere Using Multi-Height Velocities
Investigation of Phase Shift and Travel Time of Acoustic Waves in the Lower Solar Atmosphere Using Multi-Height Velocities Open
We report and discuss phase-shift and phase travel time of low-frequency (ν < 5.0 mHz) acoustic waves estimated within the photosphere and photosphere-chromosphere interface regions, utilizing multi-height velocities in the quiet Sun. The …
View article: Origin of extended Main Sequence Turn Off in open cluster NGC 2355
Origin of extended Main Sequence Turn Off in open cluster NGC 2355 Open
The presence of extended Main Sequence Turn-Off (eMSTO) in the open clusters has been attributed to various factors, such as spread in rotation rates, binary stars, and dust-like extinction from stellar excretion discs. We present a compre…