Plotting "absolute" flash times in SYNODIC this looks like an unusually quick (for a Zenith-2) synodic (or phase?) shift. (BTW, adding the laps, I get 226.5 - not 224.5 - recording absolute timings has a reduced uncertainty - "which, and how many, laps were incorrect, or just the sum?") There is only one transitional flash, at 120.92 s cumulative. Flashes before that one are recorded 2.36 to 0.88 s early wrt a multiple of 7.48; after that one they are 0.69 to 1.49 s late. Increasing the estimated period to 7.52 slightly evens out the spread - 1.76 to 0.60 and 0.30 to 1.25 s, and the plot look quite convincing. Assuming a triple period (22.55 s) there are of course three separate bands, each showing the phase shift. The individual spreads of the before/after timings are now 0.70 0.61 0.77 0.49 0.78 0.60, as opposed to 1.48 vs 1.16 0.95 s. With ~6-fold period (45.30 s) the largest spread is 0.67 s, but this has absurdly low statistical significance, with only two or three observations in each section. The "phase shift" was high in the N. For 02-54C, except for the 61st flash, the spread is only 0.53 s. 2x 3x 4x period does not significantly reduce this, and there is no indication that either of the "secondary" series in those differ in phase from others. However, the last 8 flashes are clearly grouped some 0.3 s later than the average of the middle 60 flashes, with a final period of perhaps 2.12 s. There is a similar cluster of the first 18 flashes, some 0.2 s later than the average, making the initial period about 1.95 s. This change is too large to be synodic unless the period is a large multiple. And according to my (oldish) elset, the middle 60% were from 22 to 54 deg alt in the N !? ----- Original Message ----- > 01- 56 F 03-07-18 22:11:48 LB 224.5 0.5 30 7.48 AA, 4->7 > Timings: 6.36 8.58 7.28 6.88 8.06 7.53 7.54 7.52 7.93 6.96 > 7.17 7.82 7.68 7.50 7.54 8.57 8.23 7.70 7.83 6.85 7.71 8.05 > 7.39 7.23 7.44 7.80 7.41 7.50 7.41 7.03 sec. > Large differances in induvidual timings. > > 02- 54 C 03-07-18 22:25:41 LB 202.1 0.2 100 2.02 FF, 4->i > Timings: 2.05 2.10 1.81 2.03 2.11 2.05 1.81 2.16 2.00 2.05 > 2.22 1.79 1.99 2.04 2.04 2.03 2.11 1.99 1.85 2.02 1.94 2.09 > 2.12 1.98 2.00 2.00 1.85 2.20 2.08 2.04 1.99 2.12 1.92 1.99 > 1.97 2.17 1.93 2.03 1.97 1.99 1.99 2.14 1.98 1.95 2.11 2.14 > 1.88 1.89 1.97 2.21 1.93 2.18 2.07 1.97 1.96 2.03 1.89 2.13 > 1.88 1.85 2.13 2.12 2.12 2.03 2.08 2.26 1.94 1.95 2.07 1.89 > 1.89 2.16 2.08 1.88 2.00 1.94 2.11 2.13 2.04 2.04 2.03 1.94 > 2.07 2.09 1.95 1.98 2.02 1.94 2.05 2.01 1.92 2.14 2.24 1.97 > 2.11 2.05 1.95 2.05 2.04 1.92 sec. > Nice flasher. > ----------------------------------------------------------------- To unsubscribe from SeeSat-L, send a message with 'unsubscribe' in the SUBJECT to SeeSat-L-request@satobs.org List archived at http://www.satobs.org/seesat/seesatindex.html
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