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Maria Rosa Zapatero observed the night 2003 Sep 10 with NAOMI/INGRID (loop-closing by CRB, all other operations by telescope operator or observer). She recorded 840 images of science targets between 20:17 and 06:28, i.e. 10 hours, total exposure time 21740 sec = 6.0 hours, i.e. observing efficiency 60%, not very different from the typical 70% for spectroscopic observers.
Breakdown by exposure time: 120 * 2-sec, 240 * 10-sec, 200 * 30-sec, 130 * 40-sec, 55 * 50-sec, 90 * 60-sec.
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