Interobserver variability of hand-held SQM-L measurements.

Bará, Salvador; C. Lima, Raúl; Arós, Ángel R.; Giráldez, Lucía

http://hdl.handle.net/10400.22/26202

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Abstract(s)

Under stable luminance conditions the uncertainty of the brightness measurements obtained with hand-held SQM-L detectors arises from the combination of their intrinsic precision and the random pointing errors incurred by the observers. Based on the observations performed by 13 independent observers without previous training in SQM-L use, we got an estimate of 0.074 mag/arcsec 2 for the observer-induced uncertainty (standard deviation of the sample) under 20.83 mag/arcsec 2 skies.