2012-06-30 (UT) =========== Program: CL4 (YSO Imaging, PI: Millan-Gabet et al.) Observers: Rafael, Chris S1S2E1E2W1W2 / POPs 551125 start with: beam 1 2 3 = S1 S2(REF) E1 / POPs 551 S2 crash... clear UT 03:30 = 20:30 local setup HD141513 NIRO align -5491um / -5410um NIRO NONDEST 1000Hz MEDSCAN 1/2aperture cal = hd159743 E1 crash... went out to bunker to find Vega and init... 04:45 cal = hd163955 -4219um / -3212um 40 / 40 / 30 04:50 target1 = mwc275 = hd163296 -4455um / -3513um only rarely S1E1 S2E1 fringes ... elevation is low for the long baselines ... 05:05 hd163955 -4400um / -3490um 50 / 50 / 40 good seeing 05:10 mwc275 -4580um / -3628um only rarely S1E1 S2E1 fringes ... elevation is low for the long baselines ... 05:20 hd163955 05:30 mwc275 looked around for long baseline fringes... looked also by removing the 1/2apertures... give up, didn't save these data. go to target2 = mwc300 = CHARA320108 NIRO NONDEST 750Hz MEDSCAN 06:10 cal = hd171918 NIRO align -5200um / -5167um 30 / 20 / 15 fluxes not very well balanced... NIRO align repat cal hd171918 -5250um / -5230um 40 / 40 / 30 06:35 mwc300 hard to tip/tilt especially on S2... we keep loosing it (V=11.6) also not finding even S1S2 fringe... oh well, next target is in delay range now so move on... target3 = v1295aql = hd190073 check star hd188512 NIRO align fringe offsets 07:00 cal hd188385 -5267um / -5460um 50 / 50 / 40 07:15 v1295aql -5250um / -5482um 70 / 60 / 40 07:27 hd188385 -5390um / -5640um 40 / 40 / 30 07:38 v1295aql -5400um / -5680um 07:50 hd189509 50 / 40 / 30 NIRO align to improve fluxes... 08:00 hd189509 -5540um / -5760um 60 / 40 / 40 08:12 v1295aql 08:21 hd188385 -5600um / -5850um 08:30 v1295aql 08:36 hd188385 -5670um / -5835um do something else for a while then come back to v1295aql after transit target4 = mwc614 = hd179218 NIRO align NIRO NONDEST 750Hz MEDSCAN 08:50 cal hd177305 -5720um / -5685um 09:09 mwc614 the S1S2 fringe seems surprisingly low... 09:17 cal hd181253 also low S1S2 fringe vis... NIRO align 09:27 hd181253 still low S1S2 fringe vis... go back to previous v1295aql cal hd188385 to check... S1S2 vis no longer unusually low... well, stay here and do more v1295aql brackets ?? hd188385 taking cal data ?? v1295aql now we have a nice S1S2 fringe but we cannot find the other 2 fringes... check NIRO align: OK weird back to cal... 10:05 hd188385 -5879um / -5763um note: S2 has 1/2 vis flux as S1 we checked that the same is true for IR flux S1E1 baseline has clearly highest system vis i.e. the other 2 baselines continaing S2 are lower than expected 10:25 v1295aql -5900um / -5698um found all fringes now OK... not sure what is going on with those difficulties lately... 10:38 hd188385 10: 46 v1295aql 10:59 hd189509 data seems OK, but with that lower system vis on S1S2 for some reason... 11:?? v1295aql 11:25 hd188385 done. --- Summary: S1S2E1 mwc275: 2 brackets, mostly only S1S2 fringes mwc300: failed attempt v1295 Aql: 4 brackets pre-transit mwc614: 1 bracket v1295 Aql: 3 brackets post-transit ---