### OBSDATE ### 20100418 ### LOGDATE ### 100419 ### OBSERVERS ### MJI ### WEATHER ### Clear. Clouds at start... so I left home at 10:45pm only. ### LOCATION ### SUSI ### PROGRAM ### See if the South beam X is useable or needs a lab re-alignment. Test out new PAVO software with square time window. ### SIDEROSTATS ### n3 s1 ### TARGETS ### HR 4853 (Bet Cru) HR 4656 (del Cru - flux ~8000 on gain 190) HR 4798 (alf Mus) HR 4844 (bet Mus) - no fringes the first time. V^2 on the display got up to 0.6 compared to 1.8 for bet Cru. HR 4467 (lam Cen) - no fringes the first time. HR 4700 (eps Cru) - no fringes the first time or the first sweep through the second time. Weird. HR 4679 (zet Cen) - fringes were pretty faint! HR 4743 (sig Cen) HR 4802 (tau Cen - a cal... hopefully... closer to sig Cen) ### PROBLEMS ### It was pretty clear that the South image was too far left, and even with a whole lenslet shift in the aiming point, it had to come further to the right. This needs a lab alignment... The direction we need to move the picomotor is negative. It seems that at 3.5ms, 200 frames (0.7s) integration, even a 3.1 mag star isn't always trivial to find fringes on. For whatever reason (maybe the unwrapping taken out of pavo_analysis?) the fringe search velocity should be limited to 6 microns/s.