From: Damian, Pat, Marty
Memo:  DJC/EUVE/0073/95
Subject: Moon Configuration DS shut-down rate

 We have analyzed Deep Survey (DS) adc count rates from a 
 sample of observations taken in the last six months. Our goal 
 was to find a DS shutdown rate that would turn the detector off
 during the moon observation but allow it to stay on during other observations
 including spikes, but excluding SAA. The DS adc rate data is summarized 
 in the table below. Generally, the average rate is below 100 cts/sec. 
 In many cases the maximum rate is a spike. Inspection of the graphs
 shows average rates near or slightly exceeding 200 counts/sec in 
 several cases. For this reason we have chosen 300 cts/sec as the new 
 nominal shut-down rate. To prevent spikes from turning 
 the DS off we will set the count rate limit at 9000 and the number of frames
 to be averaged over at 30. 

Source  # MJF        mean         stddev    median    min    max   #MJF.gt.200
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Moon    88674     11.54539098     33.488       1.      1.    5886.   62
HerX-1  117184    88.96396266    193.137      49.      1.    2288.   7833
HR_120  86663     100.8189423    245.748      47.      1.    4738.   6354
LoTr5   55472     106.0793554    39.9487     109.      1.    1350.   442
TonS180 105453    43.68470314    69.3979      37.      1.    4796.   1399
RE1307  117046    124.5103805    248.599      70.      1.    9148.   10521
AM Her  113513    45.36315664    44.8786      43.      1.    2164.   38
Mrk_478 108106    132.4543319    270.358      66.      1.    2412.   12822 
PG1123  115184    33.15279032    75.9949      26.      1.    3386.   1129
RE1032  116881    79.65579521    135.412      54.      1.    4165    5288
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MJF=Major Frames