Zobrazeno 1 - 10
of 536
pro vyhledávání: '"Ranjeev P"'
We conducted a multi-wavelength analysis of the blazar Mrk\,501, utilizing observations from \emph{Astro}Sat (SXT, LAXPC), \emph{Swift-UVOT}, and \emph{Fermi-LAT} during the period August 15, 2016 to March 27, 2022. The resulting multi-wavelength lig
Externí odkaz:
http://arxiv.org/abs/2411.00592
We conducted a comprehensive temporal and spectral study of the FSRQ PKS 0805-07 by using the broadband observations from the Fermi-LAT and Swift-XRT/UVOT instruments over the period MJD 54684-60264. The 3-day binned $\gamma$-ray light curve during t
Externí odkaz:
http://arxiv.org/abs/2410.23181
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 a spectro-timing analysis of the black hole X-ray transient GX 339-4 using simultaneous observations from Astrosat and NICER during the 2021 outburst period. The combined spectrum obtained from NICER, LAXPC, and SXT data is effectively des
Externí odkaz:
http://arxiv.org/abs/2409.11875
In this study, we undertake a spectral-timing analysis of the black hole X-ray binary source GRS 1915+105 using simultaneous observations carried out by AstroSat (LAXPC and SXT) and NICER in 2017. The source showed two flux levels (high and low), who
Externí odkaz:
http://arxiv.org/abs/2408.02875
Autor:
Navale, Nilam R., Pawar, Devraj, Rao, A. R., Misra, Ranjeev, Chakraborty, Sudip, Bhattacharyya, Sudip, Bambole, Vaishali A.
XB 1254-690 is a neutron star low-mass X-ray binary with an orbital period of 3.88 hrs, and it exhibits energy-dependent intensity dips, thermonuclear bursts, and flares. We present the results of an analysis of a long observation of this source usin
Externí odkaz:
http://arxiv.org/abs/2407.05371
Autor:
Bhattacherjee, Sree, Nath, Ankur, Sarkar, Biplob, Beri, Aru, Chattopadhyay, Suchismito, Bhulla, Yashpal, Misra, Ranjeev
We report results from a detailed study of the neutron star X-ray binary, 4U 1608-52 using observations with {\it AstroSat} (LAXPC/SXT) and {\it NICER} during its 2016 and 2020 outbursts. The 0.7--20.0 keV spectra could be well described with the dis
Externí odkaz:
http://arxiv.org/abs/2406.10666
We present the results from a long term X-ray analysis of Mrk 279 during the period 2018-2020. We use data from multiple missions - AstroSat, NuSTAR and XMM-Newton, for the purpose. The X-ray spectrum can be modelled as a double Comptonisation along
Externí odkaz:
http://arxiv.org/abs/2405.08478
Autor:
Anand, Kewal, Misra, Ranjeev, Yadav, J. S., Jain, Pankaj, Kumar, Umang, Bhattacharya, Dipankar
We report simultaneous detection of twin kHz and $\sim 40$ Hz quasi-periodic oscillations (QPOs) in the time-resolved analysis of the AstroSat/LAXPC observation of the neutron star low mass X-ray binary, 4U 1728-34. The frequencies of the multiple se
Externí odkaz:
http://arxiv.org/abs/2404.09546
Estimating the Jet Power from Broadband SED modeling of Mkn 501 for different particle distributions
We consider the broadband spectral energy distribution of the high energy peaked (HBL) blazar Mkn 501 using $\textit{Swift}$-XRT/UVOT, NuSTAR and $\textit{Fermi}$-LAT observations taken between 2013 and 2022. The spectra were fitted with a one-zone l
Externí odkaz:
http://arxiv.org/abs/2403.06111