Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Ezhikode, Savithri H"'
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:
Akhil, Krishna R., Kartha, Sreeja S, Mathew, Blesson, Ujjwal, K., Ezhikode, Savithri H., Thomas, Robin
Publikováno v:
A&A 681, A35 (2024)
During the visual observations of optical imaging data obtained from the DECaLS, a serendipitous discovery emerged, revealing the presence of a ringed galaxy, DES J024008.08-551047.5 (DJ0240). We performed one dimensional isophotal and two-dimensiona
Externí odkaz:
http://arxiv.org/abs/2308.15534
Autor:
Ezhikode, Savithri H., Shukla, Amit, Dewangan, Gulab C., Pawar, Pramod K., Agarwal, Sushmita, Mathew, Blesson, R, Akhil Krishna
The $\gamma-$ray emission from flat-spectrum radio quasars (FSRQs) is thought to be dominated by the inverse Compton scattering of the external sources of photon fields, e.g., accretion disk, broad-line region (BLR), and torus. FSRQs show strong opti
Externí odkaz:
http://arxiv.org/abs/2209.13574
Autor:
Bhattacharyya, Suman, Mathew, Blesson, Ezhikode, Savithri H, Muneer, S, G, Selvakumar, G, Maheswer, Arun, R., Anilkumar, Hema, Banerjee, Gourav, S, Pramod Kumar, Kartha, Sreeja S, Paul, KT, Velu, C.
We present a follow-up study on the recent detection of two X-ray flaring events by MAXI/GSC observations in soft and hard X-rays from MAXI J0709-159 in the direction of HD 54786 (LY CMa), on 2022 January 25. The X-ray luminosity during the flare was
Externí odkaz:
http://arxiv.org/abs/2206.04473
We present the results of the X-ray flaring activity of 1ES 1959+650 during October 25-26, 2017 using AstroSat observations. The source was variable in the X-ray. We investigated the evolution of the X-ray spectral properties of the source by dividin
Externí odkaz:
http://arxiv.org/abs/2104.13472
We present the results from the multi-wavelength monitoring observations of the Narrow-Line Seyfert 1 galaxy Mrk 335 with AstroSat. We analysed both the X-ray (SXT & LAXPC) and UV (UVIT) data of the source at two epochs, separated by ~18 days. The so
Externí odkaz:
http://arxiv.org/abs/2102.00805
Autor:
Bhat, Harshitha K., Chakravorty, Susmita, Sengupta, Dhrubojyoti, Elvis, Martin, Datta, Sudeb Ranjan, Roy, Nirupam, Bertemes, Caroline, Ferland, Gary, Ezhikode, Savithri H.
Publikováno v:
2020, MNRAS, 497, 2992
The EUV provides most of the ionization that creates the high equivalent width (EW) broad and narrow emission lines (BELs, NELs) of quasars. Spectra of Hypermassive Schwarzschild black holes (HMBHs, $M_{BH} \geq 10^{10} M_{\odot}$) with $\alpha$-disc
Externí odkaz:
http://arxiv.org/abs/2007.01438
The primary X-ray emission from AGN, described by a power law, irradiates the accretion disc producing reflection features in the spectrum. The reflection features arising from the inner regions of the disc can be significantly modified by the relati
Externí odkaz:
http://arxiv.org/abs/2005.03307
Autor:
Ezhikode, Savithri H., Gandhi, Poshak, Done, Chris, Ward, Martin, Dewangan, Gulab C., Misra, Ranjeev, Philip, Ninan Sajeeth
In the unified scheme of active galactic nuclei, a dusty torus absorbs and then reprocesses a fraction of the intrinsic luminosity which is emitted at longer wavelengths. Thus, subject to radiative transfer corrections, the fraction of the sky covere
Externí odkaz:
http://arxiv.org/abs/1610.00429
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