Residual image in g-band used for estimating the IGL. The image size is ∼87.7 × 63.4 arcmin². The blue dotted circle is the circular aperture with radius = 33.5′; the IGL is estimated in this region. All bright galaxies are marked with black circles. The known luminous structures- loops L1, L2, L5 (SW loop), L9 (NW loop) are indicated (see also Iodice et al. 2017b). A patch of diffuse light is also indicated.