Observed surface brightness profiles of comet C/2011 KP36 (Spacewatch) in log–log representation for flux calibrated images acquired in g-sdss (a) and r-sdss (b) bands. The individual solid curves are cross-cuts measured from the photometric center of the comet through the coma along jets J1, J2, J3, and J4, while the cuts through the coma centered in the antisolar (PA = 56°) and solar (PA = 236°) directions are marked as the dashed lines. The innermost data points that may be affected by seeing, bounded by a vertical dotted line, were not considered. Short black lines represent the canonical profile, in which the brightness varies with cometocentric distance ρ as I ∝ 1∕ρ.