Re: Hitomi obs, 4 April 2016, 0148 UT. Falcon, CO USA

From: Björn Gimle via Seesat-l <>
Date: Mon, 4 Apr 2016 11:57:04 +0200
Do NOT time at regular intervals. That way you will only get one period or
integer fractions or multiples thereof, unless you do careful arithmetic. A
graphic method helps you detect asymmetries, synodic effects and

Instead, plot the accumulated lap times MODULO trial periods (easier and
less error prone if your watch can show these directly).
I have a program that allows you to tweak the residuals to a horizontal
line (ideal case), multiple parallel lines (sub-periods or asymmetric
secondary flashes) or even divergent lines (synodic).
When the best sub-period (and offset) has been found the scale is magnified
so the smallest variations, asymmetries, and accurate period can be seen.

Of course it is very easy to write a spreadsheet for the same computation.

/Björn Gimle

Den 4 apr 2016 05:40 skrev "ronlee--- via Seesat-l" <>:
> ...
> My technique is to click the stopwatch every two sets of
> flashes.  If I miss, I go to four sets.  This yields
> around 5.2 or 10.4 seconds.  2 into 5.2 seconds is 2.6 seconds
> as my math over a reasonable set of flashes works out to.
> What I do not understand is how I am getting 2.6 seconds
> ...
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