2011-06-25 (UT)
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Program: CL6 (YSO Imaging, PI: Millan-Gabet et al.)

Observers: Rafael, PJ

B1  B2  B3
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S1  E2  W2   (W2=REF)

(S1S2E1E2W1W2: 4-4-1-1-1-5)

CLIMB on beam 1,2,3

LT  - 20:30

*** S1E2W2, W2=ref.

same config as yesterday, attempt different targets.

humidity 20% 
r0 = 3 cm

LT  - 20:30

check star and NIRO align on delta sco = HD143275 

offsets: S1 1485um / E2 2210um

much lower flux than yesterday on HD163955

niro align again on delta sco

22:00 offsets: S1 1760um / E2 1960um

niro align on HD163955 
several beams were off -- perhaps we aligned on delta sco saturating??

2000Hz NONDEST
22:16 fringes on HD163955
      offsets: S1 2000um / E2 2400um
      counts: 40 / 40 / 20 -- lower than yesterday.

22:40 now go for mwc863

1000Hz NONDEST
22:45 cal HD152429
      offsets: S1 2000um / E2 2100um
      counts: 40 / 40 / 20
      fringes look kind of crappy for a cal ... seeing is not very good

23:00 mwc863 = HD150193 = CHARA 187041
      found S1W2 fringe but not the others ...

changed to 750Hz, ~40 counts on mwc863
      not finding fringes ...

750Hz NONDEST
23:20 back to calibrator HD152429 for sanity check
      offsets: S1 1960um / E2 1860um
      counts: 30 / 35 / 30
      crappy seeing fringes all over ...

try slower camera rate

500Hz NONDEST
23:40 cal HD152429
      offsets: S1 2000um / E2 1800um
      counts down to ~10!
      no clouds ...

redo niro align -- some beams were off indeed.
counts up!

500Hz NONDEST
23:40 cal HD152429
      offsets: S1 2000um / E2 1750um
      counts ~50

00:05 mwc863
      counts ~60
      no fringes ...

00:23 try nearby target HD142666
      2000um / 1300um
      counts ~60
      nice, tiny fringe on S1E2!

00:45 cal HD152429
      out of delay

01:05 cal HD148211
      2100um / 1300um
      counts ~30?

01:15 try mwc863 again
      cannot find fringes, fluxes OK.
      target HD142666 out of delay.

go for target mwc614 = HD179218

r0 ~ 4-6cm at this higher elevation

500Hz NONDEST
01:30 cal HD177305 niro align

02:10 cal HD177305
      1500um / 1050um
      counts ?
      V ~ 0.5-0.6

02:32 target mwc614
      1400um / 970um
      counts ~ 60
      V ~ 0.2 -- seems resolved

02:50 cal HD177305
      1400um / 800um
      counts ~ 60
      could not find the fringes for some reason ...
      checked back on last mwc614 position ... OK ... 1400um / 700um

03:20 cal HD181253
      1400um / 700um
      counts ~ 50
      
out of delay on mwc614
go for v1295 aql

03:30 niro align on cal HD189509

500Hz NONDEST
03:40 cal HD189509
      1400um / 900um
      counts ~ 60
      V ~ 0.5

04:00 v1295Aql
      saturating ...
change rate to 750Hz NONDEST
      1400um / 750um
      counts ~ 40
      taking a long time to acquire the 200 good scans ... 
      V ~ 0.1 - 0.15

04:30 cal HD189509
      1400um / 650um
      counts ~ 60
      V ~ 0.5

04:50 done.

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Summary:

MWC863: several unsuccessful attempts at finding fringes, must be low Vis.
HD142666: 1 bracket.
MWC614: 1 bracket.
v1295 Aql: 1 bracket.
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