2010-06-13
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Program: CL2 (YSOs, PI: Millan-Gabet et al.)

Observers: Stefan Kraus

Telescope: S1-S2-W2-E2
Beams:     B4-B1-B3-B2
POPs:       1- 1- 5- 5

CHARA/CLIMB
Baseline: S2(pop5)-E2(pop2)-W2(pop1)
(S2 on beam 1, E2 on beam 2, W2 on beam 3, E2 reference)


LT 20:39 = UT 03:39 = LST 13:13

LT 20:40   started acquisition
LT 21:15 - HD166411 (bright calibrator for Omi Her)
   	   searching for fringes, humidity 40-50%, wind 10 km/s
LT 22:10   found fringe B2-B3 at -0.93cm
   	   some problem with ople when starting search
	   found fringe B1-B2 at -0.409cm
LT 23:00   tip-tilt failed, have to reacquire star
   	   running out of delay
LT 23:15 - HD198084, spec binary to find fringes
   	   could not find any fringes
LT 23:45 - (Spec binary)
LT 00:05   found fringes at B1B2 = -0.91cm, B2B3 = -0.46cm
LT 00:10 - HD192985 (K=4.8) calibrator for WR140, seeing 2-4cm
   	   low flux: only 50 counts with NORM 500Hz (20 counts background)
LT 00:30   also cannot find fringes with 250 Hz
LT 00:30 - HD205776 (K=4.0) calibrator for MWC361, seeing 1-3cm, humidity 40%
   	   reoptimizing alignment, clock, etc.
LT 01:14 - HD203280 (K=2.1) bright calibrator to find fringes again
   	   counts sum=1150-900 (NORM 500 Hz)
	   counts sum=700-550 (NORM 1000 Hz)
	   fringe BL12=-0.49cm, fringe looks very unstable and is drifting
   	   fringe BL23=-0.21cm
   	   with 1000Hz fringes are jumping very much
	   recording 500 Hz data
   	   after recording fringes are at -0.46, -0.17 (about 5 minutes after last writing down of the offset)
	   so we have a drift of 1mm over 10 minutes
LT 01:40   closing due to dust in the atmosphere
LT 04:20   opening again, humidity 20-30%, seeing variable
LT 04:25 - HD203280
   	   recording fringes, offsets -0.40cm, +0.29cm
LT 04:35 - HD200775 (=MWC361)
   	   finding fringes on BL12, seeing 5-8cm
	   finding all fringes
LT 04:55   recording data, NORM 500 Hz
	   offset S2=-0.62cm, W2=-0.07cm
LT 05:05 - HD203280, have to do bright calibrator again due to sunlight coming up
   	   W2 crashes
	   could find one fringe
	   have to stop due to dawn
LT 05:13   closing down