This is another small asteroid / narrow path event which we have seen probably have poorer accuracy than stated. Still, Karl's place is inside the path and it's Perseids Party time. I'll bring the gear and try it. It looks do-able if we get a full duration event and at 4x it should show fairly easily, if the skies are clean.
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This event paired up with the Perseids night, and the path of the event included Karls place - host for our Perseid Party. The event was difficult, and I decided we'd all observed together in one place, as a good test of our relative equipment, and if we got a possible event that might not quite pass the FP test, if we all got the same sucpisious dip, we may confirm an event by combination.
Kirk and I recorded on camcorders from our "OccBox"s. Karl is now using a direct-to-PC recording |
Tom and a neighbor look on |
An educational moment. |
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dimpled clouds were a problem before the event, but cleared during the minute before and after the event. |
Tonight had clouds, but a big clear area arrived over our target a couple minutes before the event. The early part of my recording clearly shows the clouds. |
The target star was close to a brighter star, which affected the auto-background shown in the aperture squares |
There was a deep dip for one integration (0.16s) right at the predicted event time, but not statistically significant against the noise. |
I inserted the square wave light curve of a maximum duration event at the event time, to help judge the significance |
The red dot is the low point of the target light curve, and is at the predicted moment. But too noisy to claim it is real.
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The predicted 0.4s event would meet the false positive test at the 3 sigma level, for my data. |
No apparent event. - KB
However, I (RN) note the longest dip in the record is right at the predicted event time, but not deep enough and significant enough to register as a 'event' in PyOTE. My conclusion again is that I don't see any confidence in calling my and Kirk's data as a "miss", but neither is it strong enough to be called a "hit". Karl's data has not been looked at yet.
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