We present here the results of the first broadband simultaneous spectral and temporal studies of the newly detected black hole binary MAXI J1820+070 as seen by SXT and LAXPC on-board AstroSat .
The observed combined spectra in the energy range 0.7 - 80 keV were well modeled using disk blackbody emission , thermal Comptonization and a reflection component .
The spectral analysis revealed that the source was in its hard spectral state ( \Gamma = 1.61 ) with a cool disk ( kT _ { in } = 0.22 keV ) .
We report the energy dependent time-lag and root mean squared ( rms ) variability at different frequencies in the energy range 3 - 80 keV using LAXPC data .
We also modeled the flux variability using a single zone stochastic propagation model to quantify the observed energy dependence of time-lag and fractional rms variability and then compared the results with that of Cygnus X-1 .
Additionally , we confirm the detection of a quasi-periodic oscillation with the centroid frequency at 47.7 mHz .