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The image below is a keogram (a north-south slice through the all-sky image versus time) from the night of 2006-11-23 to 2006-11-24. The three panels are for wavelengths of 630, 557.7 and 427.8 nm. The exposure times were 3, 1 and 5 s for the respective wavelengths and the imager repeated the wavelength sequence every 15 seconds. The intensities are in raw ADC units.

Large three-wavelength 
keogram image

 M. J. Kosch

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