We report the analysis of JHK _ { s } light curves of the eclipsing dwarf nova IP Peg in quiescence .
The light curves are dominated by the ellipsoidal variation of the mass-donor star , with additional contributions from the accretion disc and anisotropic emission from the bright spot .
A secondary eclipse is visible in the J and H light curves , with 2 \% and 3 \% of the flux disappearing at minimum light , respectively .
We modeled the observed ellipsoidal variation of the secondary star ( including possible illumination effects on its inner face ) to find a mass ratio of q = 0.42 and an inclination of i = 84.5 ^ { o } , consistent in the three bands within the uncertainties .
Illumination effects are negligible .
The secondary is responsible for 83 \% , 84 \% and 88 \% of the flux in J , H and K _ { s } , respectively .
We fitted a black body spectrum to the JHK _ { s } fluxes of the secondary star to find a temperature of T _ { bb } = 3100 \pm 500 K and a distance of d = 115 \pm 30 pc to the system .
We subtracted the contribution of the secondary star and applied 3-D eclipse mapping techniques to the resulting light curves to map the surface brightness of a disc with half-opening angle \alpha and a circular rim at the radius of the bright spot .
The eclipse maps show enhanced emission along the stream trajectory ahead of the bright spot position , providing evidence of gas stream overflow .
The inferred radial brightness-temperature distribution in the disc is flat for R < 0.3 R _ { L 1 } with temperatures \simeq 3500 K and colors consistent with those of cool opaque radiators .