Photometric IGM tomography: efficiently mapping quasar light echoes with deep narrow-band imaging
intergalactic medium quasarsabsorption lines quasarssupermassive black holesdark agesreionizationfirst starslarge-scale structure of UniverseAstrophysics - Astrophysics of GalaxiesAstrophysics - Cosmology and Nongalactic Astrophysics

