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Published online by Cambridge University Press: 04 April 2012
The Commission on Photometry and Polarimetry has a long and distinguished history in the IAU and its contributions to astronomy have been extensive and profound. Its efforts are centered on the issues of atmospheric extinction, photometric passbands, transformations among photometric systems, and calibration. Photometric and polarimetric techniques and standardization are essential tools in our exploration and investigation of astronomical objects and astrophysical quantities.