Fig. 1
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(a) Pixel intensity F (in DN, clipped at 1 due to sensor saturation, contrast-enhanced with gamma value of 0.35), DoLP P and AoLP W (in degrees) of comet C/2023 A3 on Oct. 23. Image axes denote pixel coordinates, with a scale of 2.4 arcsec or 1200 km per pixel. (b) Measured lg(P) versus lg(F) values (red dots) and fit hyperbolic tangent function (blue curve). (c) Oct. 23 image quadruple of C/2023 A3 at polarizer orientations of 0°, 45°, 90° and 135°. The pixel intensities are scaled logarithmically for better visibility of the tail.
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