UNIVERSITY OF CALIFORNIA OBSERVATORIES / LICK OBSERVATORY

LICK MEAN EXTINCTIONS
MEASURED AT MOUNT HAMILTON

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These mean extinction values for Lick Observatory were derived by Stone from many night's observations with the Wampler Prime Focus Scanner during the 1970s. They were rechecked about a decade later and found to be essentially unchanged. They are plotted below.

wavelength
(nanometers)
extinction
(magnitude/airmass)
320.01.084
325.0.948
330.0.858
335.0.794
340.0.745
345.0.702
350.0.665
357.1.617
363.6.575
370.4.532
386.2.460
403.6.396
416.7.352
425.5.325
446.4.279
456.6.259
478.5.234
500.0.203
wavelength
(nanometers)
extinction
(magnitude/airmass)
526.3.188
555.6.177
584.0.166
605.6.160
643.6.123
679.0.098
710.0.094
755.0.080
778.0.076
809.0.080
837.0.077
870.8.057
983.2.080
1025.6.050
1040.0.051
1061.0.053
1079.6.056
1087.0.064