Zobrazeno 1 - 10
of 429
pro vyhledávání: '"Mithun, N."'
Autor:
Arya, Anuraag, Bilkhu, Harmanjeet Singh, Vishwakarma, Sandeep, Belatikar, Hrishikesh, Bhalerao, Varun, Ghodgaonkar, Abhijeet, Koyande, Jayprakash G., Marathe, Aditi, Mithun, N. P. S., Narang, Sanjoli, Nimbalkar, Sudhanshu, Page, Pranav, Palit, Sourav, Patel, Arpit, Shetye, Amit, Tallur, Siddharth, Tendulkar, Shriharsh, Vadawale, Santosh, Waratkar, Gaurav
Hard X-ray photons with energies in the range of hundreds of keV typically undergo Compton scattering when they are incident on a detector. In this process, an incident photon deposits a fraction of its energy at the point of incidence and continues
Externí odkaz:
http://arxiv.org/abs/2409.08822
Autor:
Kumar, Shrabani, Dewangan, G. C., Gandhi, P., Papadakis, I. E., Mithun, N. P. S., Singh, K. P., Bhattacharya, D., Zdziarski, A. A., Stewart, G. C., Bhattacharyya, S., Chandra, S.
We present a multi-wavelength spectral study of NGC 4151 based on five epochs of simultaneous AstroSat observations in the near ultra-violet (NUV) to hard X-ray band ($\sim 0.005-80$ keV) during $2017 - 2018$. We derived the intrinsic accretion disk
Externí odkaz:
http://arxiv.org/abs/2409.04762
Autor:
Chand, Swadesh, Dewangan, Gulab C., Zdziarski, Andrzej A., Bhattacharya, Dipankar, Mithun, N. P. S., Vadawale, Santosh V.
We perform broadband ($0.7-100$ keV) spectral analysis of five hard state observations of the low-mass back hole X-ray binary GX~339--4 taken by AstroSat during the rising phase of three outbursts from $2019$ to $2022$. We find that the outburst in 2
Externí odkaz:
http://arxiv.org/abs/2406.10607
Autor:
Tiwari, Neeraj K., Vadawale, Santosh V., Mithun, N. P. S., Vaishnava, C. S., Saiguhan, Bharath
The imaging performance and sensitivity of an X-ray telescope when observing astrophysical sources are primarily governed by the optical design, geometrical uncertainties (figure errors, surface roughness, and mirror alignment inaccuracies), and the
Externí odkaz:
http://arxiv.org/abs/2405.06343
Autor:
Banerjee, Srimanta, Dewangan, Gulab C., Knigge, Christian, Georganti, Maria, Gandhi, Poshak, Mithun, N. P. S., Saikia, Payaswini, Bhattacharya, Dipankar, Russell, David M., Lewis, Fraser, Zdziarski, Andrzej A.
Publikováno v:
ApJ, 964, 189 (2024)
We present a comprehensive multi-wavelength spectral analysis of the black hole X-ray binary MAXI J1820+070 during its 2018 outburst, utilizing AstroSat far UV, soft and hard X-ray data, along with (quasi-)simultaneous optical and X-ray data from Las
Externí odkaz:
http://arxiv.org/abs/2402.08237
Autor:
Rao, Yamini K., Mondal, B., Del Zanna, Giulio, Mithun, N. P. S., Vadawale, S. V., Reeves, K. K., Mason, Helen E., Bhardwaj, Anil
We present multi-wavelength observations by Chandrayaan-2/XSM, SDO/AIA and Hinode/XRT of a B-class flare observed on 25th February, 2021, originating from an active region (AR 12804) near the North-West limb. The microflare lasts for approx 30 mins a
Externí odkaz:
http://arxiv.org/abs/2308.14912
Autor:
Bala, Suman, Mate, Sujay, Mehla, Advait, Sastry, Parth, Mithun, N. P. S., Palit, Sourav, Chanda, Mehul Vijay, Saraogi, Divita, Vaishnava, C. S., Waratkar, Gaurav, Bhalerao, Varun, Bhattacharya, Dipankar, Tendulkar, Shriharsh, Vadawale, Santosh
Publikováno v:
Journal of Astronomical Telescopes, Instruments, and Systems, Vol. 9, Issue 4, 048002 (October 2023)
The proposed Daksha mission comprises of a pair of highly sensitive space telescopes for detecting and characterising high-energy transients such as electromagnetic counterparts of gravitational wave events and gamma-ray bursts (GRBs). Along with spe
Externí odkaz:
http://arxiv.org/abs/2306.16781
Autor:
Chattopadhyay, Tanmoy, Kumar, Abhay, Rao, A. R., Bhargava, Yash, Vadawale, Santosh V., Ratheesh, Ajay, Dewangan, Gulab, Bhattacharyay, Dipankar, S., Mithun N. P., Bhalerao, Varun
Publikováno v:
Astrophysical Journal Letters, Volume 960, Number 1, L2, 2023 December 29
Cygnus X-1, the well-known accreting black hole system, exhibits several observational features hinting at an intricate interplay between the accretion disk, its atmosphere known as the corona and the putative relativistic jet. It has been extensivel
Externí odkaz:
http://arxiv.org/abs/2306.04057
Autor:
Kayal, Abhijit, Singh, Veeresh, Ricci, Claudio, Mithun, N. P. S., Vadawale, Santosh, Dewangan, Gulab, Gandhi, Poshak
Publikováno v:
Monthly Notices of the Royal Astronomical Society (2023)
The circumnuclear material around Active Galactic Nuclei (AGN) is one of the essential components of the obscuration-based unification model. However, our understanding of the circumnuclear material in terms of its geometrical shape, structure and it
Externí odkaz:
http://arxiv.org/abs/2304.10972
Autor:
Mondal, Biswajit, Vadawale, Santosh V., Del Zanna, Giulio, Mithun, N. P. S., Sarkar, Aveek, Mason, Helen E., Janardhan, P., Bhardwaj, Anil
The First Ionization Potential (FIP) bias, whereby elemental abundances for low FIP elements in different coronal structures vary from their photospheric values and may also vary with time, has been widely studied. In order to study the temporal vari
Externí odkaz:
http://arxiv.org/abs/2301.03519