Zobrazeno 1 - 10
of 3 797
pro vyhledávání: '"Pradhan, A. C."'
We present a comprehensive analysis of the broadband spectral energy distribution (SED) of the extreme high-energy peaked BL Lac (EHBL) source, 1ES 0229$+$200. Our study utilizes near-simultaneous data collected at various epochs between September 20
Externí odkaz:
http://arxiv.org/abs/2409.12827
We present the first comprehensive source catalog (UVIT DR1) of ultraviolet (UV) photometry in four far-UV (FUV $\sim$1300$-$1800 \AA) and five near-UV (NUV $\sim$2000$-$3000 \AA) filters of the Ultraviolet Imaging Telescope (UVIT) on board {\em Astr
Externí odkaz:
http://arxiv.org/abs/2409.01891
Autor:
Kumar, R., Moharana, A., Piridi, S., Pradhan, A. C., Hełminiak, K. G., Ikonnikova, N., Dodin, A., Szczerba, R., Giersz, M., Ojha, D. K., Samal, M. R.
Publikováno v:
A&A 685, L6 (2024)
We report a new hot post-asymptotic giant branch (PAGB) star in the Galactic globular cluster (GC) E3, which is one of the first of the identified PAGB stars in a GC to show a binary signature. The star stands out as the brightest source in E3 in the
Externí odkaz:
http://arxiv.org/abs/2403.12907
We present results from our deep Far-ultraviolet (FUV) survey using {\em AstroSat}/UVIT of a filamentary structure at $z$ $\sim$ $0.072$. A total of four filaments comprising 58 galaxies were probed in our study. We detect 18 filament galaxies in our
Externí odkaz:
http://arxiv.org/abs/2401.13073
Autor:
Kumar, Ranjan, Pradhan, Ananta C., Sahu, Snehalata, Subramaniam, Annapurni, Piridi, Sonika, Cassisi, Santi, Ojha, Devendra K.
Publikováno v:
2023, Monthly Notices of the Royal Astronomical Society
We present a far-ultraviolet (FUV) study of hot stellar populations in the second parameter pair globular clusters (GCs) M3 and M13, as a part of the Globular cluster UVIT Legacy Survey program (GlobULeS). We use observations made with F148W and F169
Externí odkaz:
http://arxiv.org/abs/2304.00865
The origin of star-formation in customarily passively evolving early-type massive galaxies is poorly understood. We present a case study of a massive galaxy, I~Zw~81, inside the Bootes void. The void galaxy is known to host an active galactic nuclei
Externí odkaz:
http://arxiv.org/abs/2211.04043
Autor:
Khatoon, Rukaiya, Shah, Zahir, Hota, Jyotishree, Misra, Ranjeev, Gogoi, Rupjyoti, Pradhan, Ananta C.
We have performed a detailed analysis of the X-ray spectra of the blazar Mkn 421 using Swift-XRT observations taken between 2005 and 2020, to quantify the correlations between spectral parameters for different models. In an earlier work, it has been
Externí odkaz:
http://arxiv.org/abs/2207.04524
Autor:
Kumar, Ranjan, Pradhan, Ananta C., Parthasarathy, M., Piridi, Sonika, Cassisi, Santi, Ojha, Devendra K., Mohapatra, Abhisek, Murthy, Jayant
We have studied ultraviolet (UV) bright sources in the Galactic globular cluster (GGC) NGC 4590 using Ultraviolet Imaging Telescope (UVIT) on-board the \mbox{{\em AstroSat}} satellite. Using UV-optical color-magnitude diagrams (CMDs), we have identif
Externí odkaz:
http://arxiv.org/abs/2202.03981
Autor:
Hota, Jyotishree, Shah, Zahir, Khatoon, Rukaiya, Misra, Ranjeev, Pradhan, Ananta C., Gogoi, Rupjyoti
We present a time-resolved X-ray spectral study of the high energy peaked blazar Mkn 421 using simultaneous broadband observations from the LAXPC and SXT instruments on-board AstroSat. The ~ 400 ksec long observation taken during 3-8 January, 2017 wa
Externí odkaz:
http://arxiv.org/abs/2110.03344
We present a deep far and near-ultraviolet (FUV and NUV) wide-field imaging survey of galaxies in the Bootes Void using Ultra-Violet Imaging Telescope onboard {\em AstroSat}. Our data reach $5\sigma$ limiting magnitudes for point sources at 23.0 and
Externí odkaz:
http://arxiv.org/abs/2107.01774