Zobrazeno 1 - 10
of 3 348
pro vyhledávání: '"ASTROSAT"'
We present a spectro-timing analysis of the black hole X-ray transient GX 339-4 using simultaneous observations from Astrosat and NICER during the 2021 outburst period. The combined spectrum obtained from NICER, LAXPC, and SXT data is effectively des
Externí odkaz:
http://arxiv.org/abs/2409.11875
Autor:
Sahu, Pragati, Chand, Swadesh, Thakur, Parijat, Dewangan, G. C., Agrawal, V. K., Tripathi, Prakash, Das, Subhashish
We perform a comprehensive timing and broadband spectral analysis using an AstroSat observation of the low-mass black hole X-ray binary H~1743--322 during 2017 outburst. Additionally, we use two Swift/XRT observations, one of which is simultaneous wi
Externí odkaz:
http://arxiv.org/abs/2409.10253
We present the broadband spectral and timing properties of the atoll source 4U 1702-429 using two observations of AstroSat with the second one having simultaneous NICER data. For both observations, the spectra can be represented by a Comptonizing med
Externí odkaz:
http://arxiv.org/abs/2411.10968
`Z' type neutron star low-mass X-ray binaries typically show a `Z'-like three-branched track in their hardness intensity diagram. However, a few such `Z' sources show an additional branch known as the extended flaring branch (EFB). EFB has been poorl
Externí odkaz:
http://arxiv.org/abs/2411.04521
We report the detection of 5 newly identifed Lyman-continuum (LyC) leaker candidates at redshifts 0.99-1.42 in the AstroSat UV Deep Field South F154W image. We derive physical properties of these galaxies using a combination of spectral-energy distri
Externí odkaz:
http://arxiv.org/abs/2410.09515
In this work, we performed a spectro-temporal investigation of the low-mass X-ray binary GX 9+9 using the Large Area X-ray Proportional Counter (LAXPC) and Soft X- ray Telescope (SXT) observation on board AstroSat. The source was detected in the soft
Externí odkaz:
http://arxiv.org/abs/2409.11721
Autor:
Sharma, Rahul, Mandal, Manoj, Pal, Sabyasachi, Paul, Biswajit, Jaisawal, G. K., Ratheesh, Ajay
The Be/X-ray binary pulsar RX J0440.9+4431 went through a giant outburst in December 2022 with a peak flux of $\sim$2.3 Crab in 15--50 keV. We studied the broad-band timing and spectral properties of RX J0440.9+4431 using four $AstroSat$ observations
Externí odkaz:
http://arxiv.org/abs/2409.11121
Black hole demographics in different environments is critical in view of recent results on massive-stars binarity, and of the multi-messenger detectability of compact objects mergers. But the identification and characterization of non-interacting bla
Externí odkaz:
http://arxiv.org/abs/2409.06906
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:
Epili, Prahlad R., Wang, Wei
We report the timing and spectral studies of the accreting X-ray pulsar 4U 2206+54 using astrosat and hxmt observations taken in 2016 and 2020 respectively. X-ray pulsations from the system are detected by both missions. The astrosat discovered a sig
Externí odkaz:
http://arxiv.org/abs/2408.15156