Abstract Details
| Name: Debasish Saha Affiliation: Midnapore City College Conference ID: ASI2019_353 Title : Study of Galactic micro-quasars with Astrosat Authors and Co-Authors : Debasish Saha and Sabyasachi Pal Abstract Type : Poster Abstract Category : Stars, ISM and Galaxy Abstract : Micro-quasars are known to show variable emission from a wideband emission regime ranging from low-frequency radio emission to high energy gamma-ray emission. We have used data from India's first multi-wavelength space-mission Astrosat to study broad-band properties of few selected micro-quasars from our Galaxy. LAXPC data (3-80 keV) is used to study X-ray emission from the accretion disk of these binary systems while Ultra Violet Imaging Telescope (UVIT) data is used to study UV counterpart of the binary star of the black-hole/neutron star binaries. We have detected different flaring activities in the X-ray emission of sources with a wide range of time-scales (few minutes to days). Quasi-periodic emission is detected from few of the sources. We have also detected state transition of these sources. Spectrums from these sources are fitted with different models. While possible, we have also studied multi-wavelength observation of these sources using simultaneous observations of ground based instruments in radio and optical wavelengths. |