5918 obs 08-31

From: Björn Gimle (b_gimle@algonet.se)
Date: Mon Sep 01 2003 - 08:43:54 EDT

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    While waiting for IGS 1B I spotted 88-93A Cosmos 1975 (uninteresting)
    and while observing Raduga 33 I saw a -tive magnitude flare from 88 102A
    Cosmos 1980 below the Andromeda galaxy.
    
    Raduga 33 was visible at mag -2 .. 1-power .. 7x50 for 56 minutes, with
    some 15 minutes when I didn't find it in-between. The stopwatch was
    running continuously this time, and analysis with 'synodic' showed there
    was NO phase shift, so I will have to modify my rotation model.
    The flash period decreased quite abruptly early in the "dark age" from
    33.324 to 33.236 s.
    Several 1/4 and 3/4 period flashes (no mid-period) were seen.
    
    PPAS when I have checked the total/end times and period count.
    
    IOD output from ObsReduce:
    19573 88 093A   5918 G 20030831192834000 17 25 2122111+294105 19 S+035 05
    27699 03 009B   5918 G 20030831192934440 17 25 0142145+433705 48 S
    27699 03 009B   5918 G 20030831193039640 17 25 0439913+530548 18 S
    27698 03 009A   5918 G 20030831200605670 17 25 2213694+492624 28 S
    27698 03 009A   5918 G 20030831200632280 17 25 2308908+710812 58 S
    27698 03 009A   5918 G 20030831200742420 17 25 0841814+671834 29 S
    19649 88 102A   5919 G 20030831223849000 18 25 0026486+403869 18 M-030 20
    
    The middle obs of 27698 is doubtful, but I'm almost certain of the star
    group above the track, and one of the two stars below that I used, also
    the 37% fraction. But which?
    
    The last one had a 7+ second error - I assume it was a transcription
    error 49.42 <- 42.42 , now corrected.
    
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