A5093211879- Astrophysics and Cosmic Phenomena
- Neutrino Physics Research
- Dark Matter and Cosmic Phenomena
- Particle Accelerators and Free-Electron Lasers
- Gyrotron and Vacuum Electronics Research
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Computational Physics and Python Applications
- Radio Astronomy Observations and Technology
Christ University
2024
ABSTRACT The BL Lac object PKS 0735+178 was in its historic γ-ray brightness state during 2021 December. This period also coincides with the detection of a neutrino event IC 211208A, which localized close to vicinity 0735+178. We carried out detailed timing and spectral analysis source three epochs: (a) quiescent (E1), (b) moderate-activity (E2), (c) high-activity (E3) coincident epoch detection. During (E3), we found largest variability amplitude 95 per cent. spectra corresponding these...
The BL Lac object PKS 0735+178 was in its historic $\gamma$-ray brightness state during December 2021. This period also coincides with the detection of a neutrino event IC211208A, which localized close to vicinity 0735+178. We carried out detailed timing and spectral analysis source three epochs (a) quiescent ($E_{1}$), (b) moderate activity ($E_{2}$) (c) high ($E_{3}$) coincident epoch detection. During ($E_{3}$), we found largest variability amplitude 95%. spectra corresponding these are...
We present near-simultaneous X-ray and optical polarization measurements in the high synchrotron peaked (HSP) blazar Mrk 421. The polarimetric observations were carried out using {\it Imaging Polarimetry Explorer} ({\it IXPE}) on 06 December 2023. During IXPE} observations, we also 104cm Sampurnanand telescope at Nainital multi-band imaging 2m Himalayan Chandra Telescope Hanle. From model-independent analysis of data, detected with degree ($\Pi_X$) 8.5$\pm$0.5\% an electric vector position...
Abstract We present near-simultaneous X-ray and optical polarization measurements in the high synchrotron peaked (HSP) blazar Mrk 421. The polarimetric observations were carried out using Imaging Polarimetry Explorer (IXPE) on 2023 December 6. During IXPE observations, we also 104 cm Sampurnanand telescope at Nainital multiband imaging 2 m Himalayan Chandra Telescope Hanle. From model-independent analysis of data, detected with degree (Π X ) 8.5% ± 0.5% an electric vector position angle (Ψ...
We report the first time measurement of X-ray polarization in 2$-$8 keV band from high synchrotron peaked (HSP) blazar 1ES 1959+650. The low energy hump broadband spectral distribution (SED) blazars log$\nu$ versus $\nu F_{\nu}$ plane is believed to be due emission process relativistic particles their jets. In HSP blazars, observed lies tail part SED, and measurements can constrain processes by which are accelerated present here our results on characteristics 1959+650 using observations...