Disk of 2MASS 15491331−3539118 = GQ Lup C as seen by HST and WISE

Aims. Very recently, a second companion on a wider orbit has been discovered around GQ Lup. This is a low-mass accreting star that is partially obscured by a disk seen at high inclination. If detected, this disk may be compared to the known disk around the primary. Methods. We detected this disk on archive HST and WISE data. Results. The extended spectral energy distribution provided by these data confirms the presence of accretion from H α emission and UV excess, and shows an IR excess attributable to a warm disk. In addition, we resolved the disk on the HST images. It is found to be roughly aligned with the disk of the primary. Both of them are roughly aligned with the Lupus I dust filament containing GQ Lup.