Kueyen + FORS2 activities 27.01.2000 ==================================== Commissioning Leader: J. Spyromilio Telescope Operator: G. Rupprecht Day/Night Astronomers: -/G. Rupprecht FORS2 Comm2 Team: I. Appenzeller, C. Cumani, W. Gaessler, W. Hummel, K.-H. Mantel, B. Muschielok, H. Nicklas, W. Seifert, E. Sutorius, K. Tarantik ============================================================= Night Summary ============= no observations Conditions ---------- gen: cloudy seeing: - wind: 0-10m/s humid: 50-70% temperature: 14-11C loss: all night Technical Problems ------------------ problem: see below loss: all night Other Problems -------------- After cryostat re-fill ice built up on the cryostat due to the high humidity, probably because one or more o-rings lost their elasticity and therefore their sealing property. The pressure rose to 10E-1. No leak could however be found while on the telescope. The cryostat was warmed up and dismounted to be investigated in the detector lab clean room. Ice had formed inside the cryostat. It is being baked (head and inner tank). Assistance from ODT/La Silla and ODT/Garching was requested and N. Haddad and O. Iwert will come up to Paranal on Friday and Saturday, resp. Further actions and schedule TBD. Detector not expected to be operational before Sunday night. General Comments ---------------- departure of H. Nicklas ************************ Daytime Setup Activities ************************ Setups: none Dewar refill: yes System intervention: (K. Wirenstrand) -------------------- Rtap environment wt2tcs stopped and restarted with changed parameters for RtapScheduler. Previous params: tcs 1324 1 0 Jan 22 ? 0:07 RtapScheduler -g 4096 -m 1024 -e wt2tcs New params: tcs 2833 1 0 19:43:53 ttype 0:00 RtapScheduler -g 4096 -j 1010 -m 2048 -e wt2tcs Updated /vltdata/ENVIRONMENTS/wt2tcs/RtapScheduler.options tcsBUILD NOT updated! FORS2 start-up procedure ------------------------ started: LT finished: LT by: ******************** Daytime Calibrations ******************** FORS2 contamination flats ------------------------- none FORS2 calibration plan: Biases ------------------------------ none ************************** Commissioning Observations ************************** none ********************** FORS2 Calibration Plan ********************** Sky flats morning ------------------------- none **************************** End of Nightsky Observations **************************** start closing at UT end closing at UT Telescope in: zenith Dome in: park FORS2 in: calibration position (shutter closed, LADC+GP parked, rotator -45, adapter 0) ******************** Daytime Calibrations ******************** FORS2 calibration plan: Biases ------------------------------ none ************ Action Items ************ - bake cryostat ******************************************************************** * Gero Rupprecht http://www.eso.org/~grupprec * * * Optical Instrumentation Group +49-89-32006-355 * * * European Southern Observatory Garching/Germany * ********************************************************************