Signal-to-noise ratio of the fringe peak for Deneb.
|Observing periods||Number of images||S/N|
|(hh:mm:ss)||(with rotation correction)|
|21:08:30–21:10:00 + 21:28:00–21:33:00||13 000||5.4|
|21:08:30–21:10:00 + 21:28:00–21:30:00||7000||6.6|
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