The blue peaks might appear at first glance to be separated by the window width from others, but prewhitening seems to imply this is not so. The black arrows suggest an equally split grid of five modes, with an average frequency spacing of 13.37 microHz. 1-ch PMT Very short run, due to clouds.
Sky counts three times normal.
PMT Fixed three second timing error. Sky counts three times normal. Last updated on 7 May 1998.