Characterization of few transient black hole candidates during their   X-ray outbursts with TCAF Solution
  The theoretical concept of Chakrabarti-Titarchuk two Component Advective Flow (TCAF) model was introduced around two decade ago in mid-90s. Recently after the inclusion of TCAF model into XSPEC as an additive table model, we find that it is quite capable to fit spectra from different phases of few transient black hole candidates (TBHCs) during their outbursts. This quite agrees with our theoretical understanding. Here, a brief summary of our recent studies of spectral and temporal properties of few TBHCs during their X-ray outbursts with TCAF will be discussed. 
Dipak Debnath, S. Mondal, S. K. Chakrabarti, A. Jana, A. A. Molla, D.   Chatterjee
astro-ph.HE