AstroSat observation of 2016 outburst of H 1743-322

We present the detection of type C quasi-periodic oscillation (QPO) along with upper harmonic at respective frequencies of similar to 0.6 Hz and similar to 1.2 Hz in the single AstroSat observation taken during the 2016 outburst of the low-mass black hole X-ray binary H 1743-322. These frequencies are found to be shifted by similar to 0.4 Hz for the QPO and similar to 0.8 Hz for the upper harmonic with respect to that found in the simultaneous XMM-Newton and NuSTAR observation taken five days later than the AstroSat observation, indicating a certain geometrical change in the system. However, the centroid frequency of the QPO and the upper harmonic do not change with energy, indicating the energy-independent nature. The decreasing trend in the fractional rms of the QPO with energy is consistent with the previous results for this source in the low/hard state. The value of the photon index (Gamma similar to 1.67) also indicates that the source was in the low/hard state during this particular observation. In addition, similar to the XMM-Newton observations during the same outburst, we find a hard lag of similar to 21 ms in the frequency range of similar to 1-5 Hz. The log-linear trend between the averaged time lag and energy indicates the propagation of fluctuations in the mass accretion rate from outer part of the accretion disk to the inner hot regions.