IGR J16195–4945 is a hard X-ray source discovered by INTEGRAL during the Core Program observations performed in 2003 .
We analyzed the X-ray emission of this source exploiting the S wift-BAT survey data from December 2004 to March 2015 , and all the available S wift-XRT pointed observations .

The source is detected at a high significance level in the 123-month BAT survey data , with an average 15–150 keV flux of the source of \sim 1.6 mCrab .
The timing analysis on the BAT data reveals with a significance higher than 6 standard deviations the presence of a modulated signal with a period of 3.945 d , that we interpret as the orbital period of the binary system .
The folded light curve shows a flat profile with a narrow full eclipse lasting \sim 3.5 \% of the orbital period .
We requested phase-constrained XRT observations to obtain a more detailed characterization of the eclipse in the soft X-ray range .
Adopting resonable guess values for the mass and radius of the companion star , we derive a semi-major orbital axis of \sim 31 R _ { \odot } , equivalent to \sim 1.8 times the radius of the companion star .
From these estimates and from the duration of the eclipse we derive an orbital inclination between 55 and 60 degrees .

The broad band time-averaged XRT+BAT spectrum is well modeled with a strongly absorbed flat power law , with absorbing column N _ { H } = 7 \times 10 ^ { 22 } cm ^ { -2 } and photon index \Gamma = 0.5 , modified by a high energy exponential cutoff at E _ { cut } = 14 keV .