A5101911666- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Particle Detector Development and Performance
- Radio Astronomy Observations and Technology
- Dark Matter and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Astronomical Observations and Instrumentation
- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- Particle Accelerators and Free-Electron Lasers
- Radiation Detection and Scintillator Technologies
- Astronomy and Astrophysical Research
- Geophysics and Gravity Measurements
- Adaptive optics and wavefront sensing
- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Inertial Sensor and Navigation
- Solar and Space Plasma Dynamics
- Optical Systems and Laser Technology
- Marine and Coastal Research
- Geological and Geophysical Studies
- Advancements in PLL and VCO Technologies
- Space Satellite Systems and Control
- Microgrid Control and Optimization
- Gyrotron and Vacuum Electronics Research
Tata Institute of Fundamental Research
1995-2023
ABSTRACT We study the characteristics of TeV binary LS I+61°303 in radio, soft X-ray, hard and gamma-ray (GeV TeV) energies. The long-term variability are examined as a function phase period 26.496 days well superorbital 1626 days, dividing observations into matrix 10 × phases these two periods. find that can be described by sine period, with amplitude systematically varying phase. also definite wavelength-dependent change this description. To understand radiation mechanism, we define three...
The High Altitude GAmma-Ray (HAGAR) ar- ray is a wavefront sampling array of 7 telescopes, set-up at Hanle, 4270 m amsl, in the Ladakh region Hi- malayas (Northern India). It constitutes first phase HImalayan Gamma-Ray Observatory (HIGRO) project. HA- GAR atmospheric Cherenkov telescopes established so high altitude, and was designed to reach relatively low threshold (currently around 200 GeV) with quite mirror area (31 2 ). Regular source observations are running since September 2008....
High Altitute Gamma Ray (HAGAR) experiment, an array of seven atmospheric Cherenkov telescopes, is installed at Hanle in Ladakh, altitude 4300 m, 2008.This experiment designed to study very high energy gamma rays from astronomical sources.Taking advantage location HAGAR has achieved threshold about 200 GeV.Design details and performance parameters HAGRA are discussed here.Also preliminary results for Crab nebula, which a standard candle, discussed.
Abstract In recent years, the Silicon Photomultipliers (SiPMs) have emerged as a promising photodetector in various applications such high energy physics, nuclear physics and medical instruments. One application is pixelated camera of Imaging Atmospheric Cherenkov Telescopes (IACTs). IACTs are used to detect very high-energy celestial gamma rays using Technique. The SiPM gain proportional overvoltage which difference between applied bias voltage breakdown voltage. As increases with...
The radiation mechanism of very high energy $\gamma$-ray emission from blazars and crucial parameters like magnetic field, size the emitting region are not well understood yet. To understand above mentioned properties blazars, we observed five nearby TeV (Mrk421, Mrk501, 1ES2344+514, 1ES1218+304 3C454.3) one radio galaxy (M87) using High Altitude GAmma Ray (HAGAR) telescope. HAGAR is an array seven telescopes located at Hanle, India to detect Cherenkov light caused by extensive air showers...