High-resolution Extinction Map in the Direction of the Strongly Obscured Bulge Fossil Fragment Liller 1*

We used optical images acquired with the Wide Field Camera of Advanced for Surveys onboard Hubble Space Telescope and near-infrared data from GeMS/GSAOI to construct a high-resolution extinction map in direction bulge stellar system Liller 1. In spite its appearance globular cluster, 1 has been recently found harbor two populations remarkably different ages, it is second complex similar properties (after Terzan5) discovered bulge, thus defining new class objects: Bulge Fossil Fragments. Because location inner Milky Way, very close Galactic plane, strongly affected by large variable extinction. The simultaneous study both color-magnitude diagrams revealed that coefficient R$_V$ much smaller value than commonly assumed diffuse interstellar medium (R$_V=2.5$, instead 3.1), agreement previous findings along light paths bulge. derived differential reddening spatial resolution ranging $1''$ $3''$ over field view about $90''$X$90''$. absorption clouds show patchy sub-structures variations as $\delta {\rm E}(B-V)\sim0.9$ mag.