Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Prahlad Epili"'
Autor:
S. N. Zhang, L. M. Song, Ming-Yu Ge, Q Liu, Shuinai Zhang, Prahlad Epili, Y Z Ding, F. J. Lu, J. L. Qu, Wei Wang
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 506:2712-2724
We report the orbital X-ray variability of high mass X-ray binary (HMXB) GX301--2. GX301--2 undergone a spin up process in 2018--2020 with the period evolving from $\sim$ 685 s to 670 s. The energy resolved pulse-profiles of the pulsar in 1--60 keV v
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::75006c2343b54873c8d4127b760987bf
https://doi.org/10.1093/mnras/stab1862
https://doi.org/10.1093/mnras/stab1862
Autor:
Prahlad Epili, ShiJie Zheng, Yuan-Yuan Du, Peng Zhang, W. C. Jiang, Y. M. Tang, T. Luo, C. Z. Liu, S. Yang, Y. B. Chen, Xin Ren, Xufang Li, Gang Li, Cheng-Cheng Guo, Y. J. Yang, N. Sai, W. S. Wang, Wei Wang, Lei Sun, Zhe Chang, W. G. Li, X.W. Ma, L. D. Kong, Q. Luo, Bin Meng, Y. S. Wang, Jin-Yuan Liao, X. L. Cao, Da-Wei Han, Lian Tao, L. Wang, Tianran Chen, Y. G. Zheng, C. Cai, Xiong Li, Yu-Dong Gu, G. H. Gao, Mingyu Wu, Ming-Yu Ge, Y. Huang, B. Y. Wu, Weiguang Cui, Qingcui Bu, J. J. Yang, He-Yang Liu, L. Chen, Xiaohua Liang, Yuan You, X. Y. Song, R. C. Ma, Shuo Xiao, D. K. Zhou, Youli Tuo, Yi Zhang, He Gao, Jin-Lu Qu, Shaolin Xiong, Xuchao Zhao, Bing Li, Ju Guan, R. J. Yang, F. Zhang, B. B. Yi, H. M. Zhang, Jing Jin, X. F. Li, Wenda Zhang, Bobing Wu, Ti-Pei Li, Li-Ming Song, C. Wang, Junqiang Zhang, Bai-Sheng Liu, C. K. Li, Fangjun Lu, Shuang-Nan Zhang, G. C. Xiao, W. C. Zhang, Jundan Nie, Hongwei Liu, HongSheng Zhao, S. N. Zhang, Q. Q. Yin, Y. P. Chen, Y. Nang, P. J. Wang, Shu-Mei Jia, Ge Ou, Yin Xu, Jia Huo, X. Y. Wen, Z. W. Li, Xin Lu
Publikováno v:
Journal of High Energy Astrophysics. 30:1-8
GRO J1008-57, as a Be/X-ray transient pulsar, is considered to have the highest magnetic field in known neutron star X-ray binary systems. Observational data of the X-ray outbursts in GRO J1008-57 from 2017 to 2020 were collected by the Insight-HXMT
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8e57457f919f25d0c230628de0692124
https://doi.org/10.1016/j.jheap.2021.01.002
https://doi.org/10.1016/j.jheap.2021.01.002
Autor:
Prahlad Epili, Sachindra Naik, Gaurava K. Jaisawal, P. C. Agrawal, Arghajit Jana, Birendra Chhotaray
Publikováno v:
Jaisawal, G K, Naik, S, Epili, P R, Chhotaray, B, Jana, A & Agrawal, P C 2021, ' AstroSat observations of eclipsing high mass X-ray binary pulsar OAO 1657-415 ', Journal of Astrophysics and Astronomy, vol. 42, no. 2, 72 . https://doi.org/10.1007/s12036-021-09701-x
We present the results obtained from analysis of two AstroSat observations of the high mass X-ray binary pulsar OAO 1657-415. The observations covered 0.681-0.818 and 0.808-0.968 phases of the $\sim$10.4 day orbital period of the system, in March and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3fae5688a7852400419feeccc3f24c55
Autor:
Shivangi Gupta, Arghajit Jana, Prahlad Epili, Birendra Chhotaray, P. C. Agrawal, Sachindra Naik, Gaurava K. Jaisawal
Publikováno v:
Jaisawal, G K, Naik, S, Gupta, S, Agrawal, P C, Jana, A, Chhotaray, B & Epili, P R 2021, ' Detection of X-ray pulsations at the lowest observed luminosity of Be/X-ray binary pulsar EXO 2030+375 with AstroSat ', Journal of Astrophysics and Astronomy, vol. 42, no. 2, 33 . https://doi.org/10.1007/s12036-021-09699-2
We present the results obtained from timing and spectral studies of Be/X-ray binary pulsar EXO 2030+375 using observations with the Large Area Xenon Proportional Counters and Soft X-ray Telescope of AstroSat, at various phases of its Type-I outbursts
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::72f73bd844c4924e338a53e720138a6f
http://arxiv.org/abs/2012.14113
http://arxiv.org/abs/2012.14113
Autor:
Sachindra Naik, Georgios Vasilopoulos, Prahlad Epili, Neeraj Kumari, Wynn C. G. Ho, Gaurava K. Jaisawal
Publikováno v:
Jaisawal, G K, Naik, S, Ho, W C G, Kumari, N, Epili, P & Vasilopoulos, G 2020, ' Revisiting the spectral and timing properties of 4U 1909+07 with NuSTAR and Astrosat ', Monthly Notices of the Royal Astronomical Society, vol. 498, pp. 4830–4838 . https://doi.org/10.1093/mnras/staa2604
We present the results obtained from the analysis of high mass X-ray binary pulsar 4U 1909+07 using NuSTAR and Astrosat observations in 2015 and 2017 July, respectively. X-ray pulsations at $\approx$604 s are clearly detected in our study. Based on t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::555745b11e0bd18e7ada3f718a397d69
http://arxiv.org/abs/2008.11093
http://arxiv.org/abs/2008.11093
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 472:3455-3466
We present a comprehensive timing and spectral studies of Be/X-ray binary pulsar EXO 2030+375 using extensive Rossi X-ray Timing Explorer observations from 1995 till 2011, covering numerous Type I and 2006 Type II outbursts. Pulse profiles of the pul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::99d0cf301503b9b1d23acdf5415e6ce2
https://doi.org/10.1093/mnras/stx2247
https://doi.org/10.1093/mnras/stx2247
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 457:2749-2760
We report the timing and spectral properties of Be/X-ray binary pulsar GX 304-1 by using two Suzaku observations during its 2010 August and 2012 January X-ray outbursts. Pulsations at ~275 s were clearly detected in the light curves from both the obs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::18252b78e215c94f947b7efd6a87eabc
https://doi.org/10.1093/mnras/stw085
https://doi.org/10.1093/mnras/stw085
Publikováno v:
Jaisawal, G K, Naik, S, Gupta, S, Chenevez, J & Epili, P 2018, ' A curious case of the accretion-powered X-ray pulsar GX 1+4 ', Monthly Notices of the Royal Astronomical Society, vol. 478, no. 1, pp. 448-459 . https://doi.org/10.1093/mnras/sty1049
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society
We present detailed spectral and timing studies using a NuSTAR observation of GX 1+4 in October 2015 during an intermediate intensity state. The measured spin period of 176.778 s is found to be one of the highest values since its discovery. In contra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1afadde54df3b1e3fd400eeadc96dc72
https://orbit.dtu.dk/en/publications/c0bb47c5-c892-4393-bb34-08ee8e235bbb
https://orbit.dtu.dk/en/publications/c0bb47c5-c892-4393-bb34-08ee8e235bbb
Publikováno v:
Gupta, S, Naik, S, Jaisawal, G K & Epili, P R 2018, ' Spectral and timing studies of 2S 1417-624 during a giant outburst ', Monthly Notices of the Royal Astronomical Society, vol. 479, no. 4, pp. 5612-5619 . https://doi.org/10.1093/mnras/sty1804
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society
We present the results obtained from timing and spectral studies of the accretion powered X-ray pulsar 2S~1417-624 during a giant outburst in 2009 by using {\it Rossi X-ray Timing Explorer (RXTE)} observations. X-ray pulsations were detected in the l
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9f1fa17b2ce40c2a8a86b84c8a4781ac
https://orbit.dtu.dk/en/publications/f5db386c-7337-4ae5-b2b1-93ec9c95ac81
https://orbit.dtu.dk/en/publications/f5db386c-7337-4ae5-b2b1-93ec9c95ac81
We present the results obtained from detailed timing and spectral studies of the Be/X-ray binary pulsar KS 1947+300 during its 2013 giant outburst. We used data from Suzaku observations of the pulsar at two epochs i.e. on 2013 October 22 (close to th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a0e7704eb9915c08eadf33cf8e33f269