Final stack (!) with a subtraction of a nearby star, showing a faint halo ~10" across around it. Both stacked astrometrically in ASTAP, using the ephemeris for the comet, so instrumental PSFs should be identical. Subtracted star was scaled such that the residuals showed a dip in brightness in the middle to ensure I was fully subtracting the nucleus, hence it being a vague doughnut. |
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