  Combined ASCA and SIGMA data of 1E1740.7-2942 during the standard state
(September 1993 and 1994) were fitted with two-phase models (ISMBB/Poutanen at
al. and ADAF/Narayan et al.). In ISMBB's, the radius of the spherical hot (Te =
150 - 200 KeV) corona lies between 200 - 250 km where it joins the classical
inner disc. The disc radiates 40 per cent of the total luminosity with 1.7 per
cent of the Eddington accretion rate of 10 solar mass black hole. ADAF's need
an extra component to reproduce the soft part of the spectrum. However, the
origin of the soft excess remains somewhat uncertain, although special care was
taken in the background elimination.
