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| wiki:astronomy:observational_astronomy:measurements:what_the_detector_measures [2023/11/14 12:29] – Roy Prouty | wiki:astronomy:observational_astronomy:measurements:what_the_detector_measures [2023/11/14 12:31] (current) – Roy Prouty | ||
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| ====== What does the detector measure? ====== | ====== What does the detector measure? ====== | ||
| - | tl;dr: Photons. CCDs and CMOSs are photon counters.\\ \\ | + | tl;dr: Photons. CCDs and CMOSs are photon counters. The number that it counts per pixel is called the counts, the LUM, or the ADU.\\ \\ |
| ===== What's a count? ===== | ===== What's a count? ===== | ||