2012-06-28 (UT) =========== Program: CL4 (YSO Imaging, PI: Millan-Gabet et al.) Observers: Rafael, Chris beam 1 2 3 = E1 E2(REF) S1 / POPs 135 beam 1 2 3 = W1 W2(REF) S2 / POPs 255 start with beam 1 2 3 = E1 E2(REF) S1 / POPs 135 clear UT 03:40 = 20:40 local NIRO align hd135742 fringe offsets +6um / +2000um NIRO NONDEST 1000Hz MEDSCAN 1/2aperture 04:20 cal1 = hd159743 offsets: 940um / 2300um counts: 40 / 60 / 30 good seeing low elevation ~20deg 04:30 target 1 = mwc275 = hd163296 1250um / ?? - E1E2 fringe surprisingly small... 70 / 70 / 40 - low flux pixel repeat NIRO align much better flux balance much better E1E2 fringe saw the E2S1 fringe but tiny... 2 files saved on target might improve as elevation comes up... 04:52 hd159743 this cal requires NIRO re-align due to diff in dec, use other cal next 675um / 2200um 60 / 70 / 50 05:00 cal2 = hd163955 1025um / 2250um 05:12 mwc275 816um / 1950um 40 / 40 / 60 - less flux than earlier?? E1E2 clear fringe E2S1 low SNR maybe there sometimes? saving data took out aperture to check fringe SNR: better and no saturation due to low elevation close bracket before changing ?? hd163955 open apertures NIRO align 05:30 hd163955 782um / 2288um 70 / 90 / 70 05:40 mwc275 635um / 2250um all 3 fringes visible now, but of course low SNR on long baselines 05:56 hd163955 06:00 mwc275 now saturating ocasionally since elevation is higher... 06:19 cal3 = hd170622 move on to next target2 = v1295aql = hd190073 NIRO NONDEST 750Hz MEDSCAN 06:28 NIRO align hd188512 wait a bit for delay... 06:54 hd188512 can't find the long baselines fringes, maybe this checkstar is resolved... 06:59 cal1 = hd188385 NIRO align 87um / 2355um 07:10 v1295aql 77um / 2316um 50 / 50 / 50 all 3 fringes clear SNR 07:30 hd188385 -68um / 2250um 07:40 took another calibrator sequence by mistake... 07:50 v1295aql -98um / 2324um 50 / 50 / 50 looked at SHORTSCAN data, doesn't improve much fringe overlap and 31 fringe packet partially outside scan.. continue taking data in MEDSCAN 08:05 hd188385 08:15 v1295aql -162um / 2240um 08:30 hd188385 -176um / 2250um move to another target3 = mwc614 = hd179218 NIRO align on some bright star NIRO NONDEST 750Hz MEDSCAN 08:40 cal1 = hd177305 -13um / 2240um 40 / 40 / 40 08:50 mwc614 -36um / 2200um 60 / 60 / 60 ?? hd177305 09:15 mwc614 -19um / 2188um 60 / 60 / 60 09:25 hd177305 09:35 mwc614 -46um / 2146um 50 / 50 / 50 09:50 hd177305 go back to target2 = v1295aql = hd190073 NIRO align NIRO NONDEST 750Hz MEDSCAN 10:05 hd188385 or was it hd189509? -99um / 2130um 10:15 v1295aql -68um / 2172um 10:30 hd189509 10:37 v1295aql 10:49 hd189509 11:05 v1295aql 11:30 hd189509 done. --- Summary: E1E2S1 mwc275: 5 brackets (2 cleanest w. 3 fringes) v1295 Aql: 4 brackets pre-transit mwc614: 3 brackets v1295 Aql: 3 brackets post-transit ---