Table 1: Log of the FEROS observations of AD Boo, VZ Hya, and WZ Oph. HJD refers to mid-exposure. The exposure time $t_{\rm exp}$ is given in seconds. The signal-to-noise ratio per resolution element (S/N) of individual exposures was measured around 6070 Å. Observers: H = Heidelberg/Copenhagen guaranteed time; JVC = J.V. Clausen; JS = J. Southworth.
HJD-2 400 000 Observer Phase $t_{\rm exp}$ S/N
AD Boo        
51 207.8746 JVC 0.6844 2280 125
51 208.8792 JVC 0.1700 2400 200
VZ Hya        
51 207.6144 JVC 0.2192 1800 165
51 207.7489 JVC 0.2655 1800 160
51 210.7054 JVC 0.2835 2400 200
51 211.7137 JVC 0.6307 2400 240
51 563.8019 JVC 0.8606 2400 160
WZ Oph        
51 390.6069 H 0.3318 2700 210
52 776.7735 JS 0.6727 300 50
52 776.8016 JS 0.6794 300 45
52 776.8338 JS 0.6871 300 55
52 776.8736 JS 0.6966 300 50
52 776.9054 JS 0.7042 300 45
52 777.6218 JS 0.8754 300 55
52 777.7127 JS 0.8972 300 45
52 777.7649 JS 0.9096 300 75
52 777.8076 JS 0.9198 300 70
52 777.8569 JS 0.9316 300 55
52 778.7325 JS 0.1409 300 30
52 778.7710 JS 0.1501 420 50
52 778.8148 JS 0.1606 300 35


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