The well known black hole candidate H 1743-322 exhibited temporal and spectral variabilities during several outbursts .
Daily variation of the accretion rates and the flow geometry change on a daily basis during each of the outbursts could be understood very well using the recent implementation of two component advective flow ( TCAF ) solution of the viscous transonic flow equations as an additive table model in XSPEC .
This has dramatically improved our understanding about the accretion flow dynamics .
Most interestingly , the solution allows to treat mass of the black hole candidate as a free parameter and there mass could be estimated from spectral fits .
In this paper , we fit the data of two successive outbursts of H 1743-322 in 2010 and 2011 and studied evolutions of accretion flow parameters , such as , two component ( Keplerian and sub-Keplerian ) accretion rates , shock location ( i.e. , size of the Compton cloud ) , etc .
We assume that the model Normalization remains the same accross the states in both these outbursts .
We use this to estimate mass of the black hole and found that it comes out in the range of 9.25 - 12.86 M _ { \odot } .
For the sake of comparison , we also estimated mass using Photon index vs. QPO frequency correlation method which turns out to be 11.65 \pm 0.67 M _ { \odot } using GRO J1655-40 as reference source .
Combining these two estimates , the most probable mass of the compact object becomes 11.21 ^ { +1.65 } _ { -1.96 } M _ { \odot } .