This is a good event, should be easy. Best for Karl, but do-able from the BD air field and also Scotts Valley. Wide path. Dur=0.8s, B-V=1.3 magnitudes.
Alt=28 Az=179 in Sagittarius, between spout and top of tea kettle
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I set up at the red Realty place, in the dirt below, off Hwy 17 near Summit Rd.
I mis-identified the target as a much brighter star nearby than it really was. The target was actually rather faint. However, there was a definite low area in my data at the correct time, after I applied a block=8 to the data. I should have done 4x or maybe even 8x, but instead I did 1x.
The solution was to artificially block by 8 readings. This isn't as good as doing an 8x setting right away because I'm still ending up with the read out noise. But, it was better than no blocking. I could see an event at the correct time, but zooming in it was quite noisy. In order to prevent a false ID at a spot 1 minute before the event, and risk the same 1 minute after the event, I trimmed out the data with false positive and kept just the minute or so that was centered on the event. This hurt the NIE value, which was only 1.4 sigma. However, from a chord not far from my own, Karl von Ahnen had a very solid positive also 0.80s, from home - and so I do believe I must have had a positive at my site. We were only a few tenths of a mile apart cross-track. My accuracies are not great, but the event found was at the predicted max of 0.8 seconds
I used a smaller 2.4px mask to reduce noise in PyMovie.
magDrop report: percentDrop: 92.0 magDrop: 2.747 too much noise; cannot calculate error bars
DNR: 1.84
D time: [07:05:11.8851]
D: 0.6800 containment intervals: {+/- 0.1559} seconds
D: 0.9500 containment intervals: {+/- 0.6036} seconds
D: 0.9973 containment intervals: {+/- 1.4817} seconds
R time: [07:05:12.6851]
R: 0.6800 containment intervals: {+/- 0.1559} seconds
R: 0.9500 containment intervals: {+/- 0.6036} seconds
R: 0.9973 containment intervals: {+/- 1.4817} seconds
Duration (R - D): 0.8000 seconds
Duration: 0.6800 containment intervals: {+/- 0.2857} seconds
Duration: 0.9500 containment intervals: {+/- 0.8437} seconds
Duration: 0.9973 containment intervals: {+/- 1.8313} seconds
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I got a .5 sec positive for 2000 CB38, 4x at Sunlit Lane, July 14. Light curve was noisy, but PyOTE found an event. I tried several size apertures, best results were with a 2.0 size mask, it gave a NIE sigma distance of 2.3.
magDrop report: percentDrop: 54.0 magDrop: 0.844 +/- 0.329 (0.95 ci)
DNR: 1.57
D time: [07:05:13.1877]
D: 0.6800 containment intervals: {+/- 0.0447} seconds
D: 0.9500 containment intervals: {+/- 0.1884} seconds
D: 0.9973 containment intervals: {+/- 0.3947} seconds
R time: [07:05:13.7215]
R: 0.6800 containment intervals: {+/- 0.0447} seconds
R: 0.9500 containment intervals: {+/- 0.1884} seconds
R: 0.9973 containment intervals: {+/- 0.3947} seconds
Duration (R - D): 0.5338 seconds
Duration: 0.6800 containment intervals: {+/- 0.0749} seconds
Duration: 0.9500 containment intervals: {+/- 0.2159} seconds
Duration: 0.9973 containment intervals: {+/- 0.4599} seconds
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July 13/14 12:05:13 2000 CB38 from East of "The Rock". Clear, average seeing, no moon (or v. low behind trees). Shot at 16X, visible short blink.
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