wiki:astronomy:observational_astronomy:measurements:what_the_detector_measures

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wiki:astronomy:observational_astronomy:measurements:what_the_detector_measures [2023/11/14 12:28] – Roy Proutywiki: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? =====
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-After this calibration, the counts remaining in the image should be proportional to the energy received from the source alone. Further photometric calibration can be performed to relate these counts to relative or absolute [[~:..:radiative_flux|physical units]].+After this calibration, the counts remaining in the image should be proportional to the energy received from the source alone. Further photometric calibration can be performed to relate these counts to some [[wiki:astronomy:magnitude|magnitude scale]] or to some absolute scale via some measure of [[wiki:astronomy:radiative_quantities|radiative quantities]].
  
 {{tag>[pls-review]}} {{tag>[pls-review]}}