dark current

Price-Whelan made a remarkable discovery today—which may be false or an error of some kind, so don't quote me—that commercial digital cameras do not always subtract the dark frame, and the dark currents of the pixels are significant and vary from pixel to pixel. If this is right, we are going to be able to vastly improve the sensitivity of the cameras we have. Time to start writing the paper!

Posted via web from Traction Lobe