Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Iyer, Nirmal"'
IGR J16320-4751 is a highly obscured HMXB source containing a very slow neutron star ($P_{spin}\sim1300$ sec) orbiting its supergiant companion star with a period of $\sim$9 days. It shows high column density ($N_{H}\sim2-5\times10^{23}$ $cm^{-2}$) i
Externí odkaz:
http://arxiv.org/abs/2209.13847
Autor:
Abarr, Quincy, Beheshtipour, Banafsheh, Beilicke, Matthias, Bose, Richard, Braun, Dana, de Geronimo, Gianluigi, Dowkontt, Paul, Errando, Manel, Gadson, Thomas, Guarino, Victor, Heatwole, Scott, Hossen, Md. Arman, Iyer, Nirmal K., Kislat, Fabian, Kiss, Mózsi, Kitaguchi, Takao, Krawczynski, Henric, Lanzi, R. James, Li, Shaorui, Lisalda, Lindsey, Okajima, Takashi, Pearce, Mark, Peterson, Zachary, Press, Logan, Rauch, Brian, Simburger, Garry, Stuchlik, David, Takahashi, Hiromitsu, Tang, Jason, Uchida, Nagomi, West, Andrew
X-Calibur is a balloon-borne telescope that measures the polarization of high-energy X-rays in the 15--50keV energy range. The instrument makes use of the fact that X-rays scatter preferentially perpendicular to the polarization direction. A berylliu
Externí odkaz:
http://arxiv.org/abs/2204.09761
We report the results from a detailed timing and spectral study of transient X-ray pulsars, 4U 1901+03 during its 2019 outburst. We performed broadband spectroscopy in the 1-70 keV energy band using four observations made with Swift and NuSTAR at dif
Externí odkaz:
http://arxiv.org/abs/2009.12896
In recent years, a number of purpose-built scintillator-based polarimeters have studied bright astronomical sources for the first time in the hard X-ray band (tens to hundreds of keV). The addition of polarimetry can help data interpretation by resol
Externí odkaz:
http://arxiv.org/abs/1907.09030
Autor:
H., Sreehari, T., Ravishankar B., Iyer, Nirmal, Agrawal, V. K., Katoch, Tilak B., Mandal, Samir, Nandi, Anuj
We present the results of Target of Opportunity (ToO) observations made with AstroSat of the newly discovered black hole binary MAXI J1535-571. We detect prominent C-type Quasi-periodic Oscillations (QPOs) of frequencies varying from 1.85 Hz to 2.88
Externí odkaz:
http://arxiv.org/abs/1905.04656
We carried out spectro-temporal analysis of the archived data from multiple outbursts spanning over the last two decades from the black hole X-ray binary GX 339-4. In this paper, the mass of the compact object in the X-ray binary system GX 339-4 is c
Externí odkaz:
http://arxiv.org/abs/1811.04341
Publikováno v:
In New Astronomy January 2023 98
We report on our attempt to understand the outbursting profile of Galactic Black Hole (GBH) sources, keeping in mind the evolution of temporal and spectral features during the outburst. We present results of evolution of Quasi-periodic Oscillations (
Externí odkaz:
http://arxiv.org/abs/1802.05163
Autor:
Iyer, Nirmal, Paul, Biswajit
IGR J16318-4848 is an X-ray binary with the highest known line of sight absorption column density among all known X-ray binary systems in our galaxy. In order to investigate the reason behind such a large absorption column, we looked at the variation
Externí odkaz:
http://arxiv.org/abs/1706.07199
Autor:
Iyer, Nirmal, Nandi, A.
We re-analysed the archival data of RXTE / INTEGRAL / Swift satellites at the onset phase of the 2011 outburst of the X-ray source IGR J17091-3624. The evolution of the spectral and temporal properties of the source in this phase clearly exhibits sta
Externí odkaz:
http://arxiv.org/abs/1309.2379