### OBSDATE ###
20100519

### LOGDATE ###
100519

### OBSERVERS ###
ACR, MJI

### WEATHER ###
Clear. 

### LOCATION ###
SUSI

### PROGRAM ###
The Sco-Cen OB star survey.

### SIDEROSTATS ###
  n4   s3 

### TARGETS ###
HR 4853 (bet Cru)
del Cru
alf mus fro LCC
hr 4844 from LCC (rubbish fringes)

### PROBLEMS ###
Seeing didn't look great (or something else intermittent?). The fringes would come and go. We set the servo gain to 0.5, in case that was part of the problem. OPD error was typically small - almost never above 0.3 microns. When the fringes were found, the V2C/V2 ratio peaked at nearly 0.5, but was typically 0.2. This indicates pretty low t0. The jet stream analysis didn't show a really clear jetstream, sot that isn't an obvious excuse for the seeing.

Noticed some cloud cover at about 10:30pm. After about 11pm it got difficult to do anything but bet/del cru. 

Fringes found at +3900 on PAVO and airoffset of -2. "dispersion" was never turned off because we didn't confidently get the glass right.