Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Manojendu Choudhury"'
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, In press
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, In press
We explore the long-term evolution of the spin period of the High Mass X-ray Binary (HMXB) pulsar Vela X-1 over a period of 46 yr. Our analysis indicates nearly periodic variations in the spin period of the pulsar on time-scales of about 5.9 yr. Ther
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::97e64e4611e5be96295b9d2df509caad
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 495 (3), pp.2664-2672. ⟨10.1093/mnras/staa1041⟩
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 495 (3), pp.2664-2672. ⟨10.1093/mnras/staa1041⟩
We present the timing and spectral studies of RX J0209.6-7427 during its rare 2019 outburst using observations with the Soft X-ray Telescope (SXT) and Large Area X-ray Proportional Counter (LAXPC) instruments on the AstroSat satellite. Pulsations hav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c36b838c43676bf109a18852076c1aa0
http://arxiv.org/abs/2004.04930
http://arxiv.org/abs/2004.04930
Autor:
Manojendu Choudhury, Tilak Katoch, Biswajit Paul, Jai Verdhan Chauhan, J. S. Yadav, P. C. Agrawal, Dipankar Bhattacharya, R. K. Manchanda, Ranjeev Misra, Jayashree Roy, Nirmal Iyer, Parag Shah, P. Madhavani, Dhiraj Dedhia, H. M. Antia, Mayukh Pahari
The Be X-ray Binary 4U 0115+63 was observed by Large Area X-ray Proportional Counter (LAXPC) instrument on AstroSat on 2015 October 24 during the peak of a giant Type II outburst. Prominent intensity oscillations at ~ 1 and ~ 2 mHz frequency were det
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cd99450ce045d4b39d0bf432c589a21f
Rossi X-ray Timing Explorer (RXTE)/Proportional Counter Array (PCA) observations of IGR J19294+1816 covering two outburst episodes are reported. The first outburst happened during MJD 54921-54925 (2009 C.E.) and the second one happened during MJD 554
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d0d4f4fa422d360de3415f61c14d4674
http://arxiv.org/abs/1711.01539
http://arxiv.org/abs/1711.01539
Autor:
Nikunj Maheshwari, A. R. Rao, Rupal Basak, Sarthak Chandra, Manojendu Choudhury, Jishnu Bhattacharya, Ranjeev Misra
Publikováno v:
Research in Astronomy and Astrophysics. 14:35-46
We make a detailed time resolved spectroscopy of bright long gamma ray bursts (GRBs) which show significant GeV emissions (GRB 080916C, GRB 090902B, and GRB 090926A). In addition to the standard Band model, we also use a model consisting of a blackbo
Publikováno v:
Monthly Notices of the Royal Astronomical Society: Letters. 421:L1-L5
We have recently studied LS 5039, a gamma-ray binary, with Giant Meterwave Radio Telescope (GMRT) during its periastron and apastron passage. The results presented here show that the spectra are inverted at the low frequency and the flux densities do
Autor:
Somak Bhattacharyya, A. R. Rao, K. P. Singh, Gulab C. Dewangan, N. P. S. Mithun, Yash Bhargava, G. C. Stewart, Santosh V. Vadawale, Sunil Chandra, Manojendu Choudhury, Dipankar Bhattacharya, K. Mukerjee
Publikováno v:
The Astrophysical Journal. 849:141
We present X-ray light curves of Cygnus X-3 as measured by the recently launched AstroSat satellite. The light curve folded over the binary period of 4.8 hours shows a remarkable stability over the past 45 years and we find that we can use this infor
Among the transient black hole binary systems, 4U 1630-47 is one of the most active sources exhibiting outbursts every few hundred days, with every outburst lasting typically around hundred days. During the 2002-2004 outburst the appearance of quasi-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::297fea1bf2506c4ef3cd806a9119e5e2
http://arxiv.org/abs/1502.01432
http://arxiv.org/abs/1502.01432
Autor:
Manojendu Choudhury, V. K. Agrawal, Kandulapati Sriram, Surajit Dasgupta, A. R. Rao, Jayant K. Pendharkar
Publikováno v:
The Astrophysical Journal. 631:1072-1081
Multi-wavelength observations of Galactic black hole candidate sources indicate a close connection between the accretion disk emission and the jet emission. The recent discovery of an anti-correlated time lag between the soft and hard X-rays in Cygnu
Publikováno v:
Astronomy & Astrophysics. 383:L35-L38
We present the results of a detailed correlation study between the soft X-ray, hard X-ray, and radio emission (obtained from RXTE ASM, BATSE, and GBI observations, respectively) of the bright radio emitting Galactic X-ray binary Cygnus X-3. We detect