extinction curve of the lensing galaxy of B 1152 + 199 atz = 0 : 44 ?

the date of receipt and acceptance should be inserted later Abstract. We present UBV RIz 0 photometry of the gra-vitational lens candidate CLASS B1152+119 obtained with the Nordic Optical Telescope. The two QSO components are resolved in the B, V , R, I and z 0 bands connrming the lensing nature of the system. The z = 0:44 lens galaxy is clearly detected in B, R, I and z 0 and its position is found to be almost coincident with the faint QSO image which is heavily extincted (relative to the brighter QSO image) by dust in the lens galaxy. The extinction curve of the lens galaxy derived from the relative photometry is well tted by a Galactic extinction law with 1:3. R V. 2:0 and E(B ? V) 1. From a simple model of the system we predict a time delay of 60 days.