International Gemini Observatory/NOIRLab/NSF/AURA
Residual image of the optical afterglow of GRB 051221a
Residual image of the optical afterglow (r'-band from GMOS-North) of GRB 051221a highlighted by image subtraction techniques. The position of the afterglow (cross, template image) is offset by 0.12 +/- 0.04 arcseconds with respect to the host galaxy's center.
