ENR CTIO Blanco 4-m 2015-09-08

*Observing Team*

_DES Observers:_ Ross Cawthon, James Lasker, David James
_Telops:_ Manuel Hernandez, Claudio Aguilera
_Remote Support:_ ---

*Observing Plan*

# standard bias and dome flat sequence
# evening standard stars
# run ObsTac queue
# Handoff to Community Observers at 23:30 CLT
# Take over from Community Observers at 04:30 CLT
# end of night calibrations

*Conditions*

# weather in afternoon: 4pm (local): Clear but with forecast of partial clouds
# weather after dinner: 6pm (local): Partly Cloudy
# weather after sunset: 8pm (local): Clouds covering most of sky to varying degrees of opacity. Small circle overhead without clouds. Standards taken but likely low quality.
# weather during night: 9:15pm (local): Rasicam shows clouds encroaching from the East. Significant portions of DES Fields under some amount of cloud cover.
# Rest of the night under significant cloud cover, stars detected dropped to zero. Closed dome at 11:30 CLT and did not reopen. Zero patches of sky clear.

*Accomplishments*

# Afternoon: zeros done, (ugrizYVR) dome flats done, checked, OK
# Evening: Standards (E8-A, E6-A, High Airmass Standards skipped due to total cloud cover)
# aTmCam and GPS Monitor Checked.
# First Half Survey Exposures 472562-472645 (mostly r and i, few g and z scattered throughout, 6 Y at start of night, all likely spoiled by clouds);
# teff of -1.00 (Exposures 472604-5)

*Problems tagged as Synopsis_Problem*

# None

*Minor Problems and Relevant Information*

# Issue on DECals, see night summary.

*Notes for Data Management*

# Due to Clouds, it might be worth declaring exposures 472552-472561(Standards) as bad

# Due to Clouds causing teff near or equal to 0.00 for 472563-472645 (Survey Exposures), might be worth marking them as bad.

# Due to guide star failures and/or quickreduce failures, exposures 472609-614 and 472617-645  are almost certainly bad

# DECal issue