ENR CTIO Blanco 4-m 2014-01-19

*Observing Team*

 

_DES Observers:_ Claudio Bruderer, Peter Nugent

_Telops:_ Alberto Alvarez

_Remote Support:_ Javier Rojas 

 

*Observing Plan*

 

# standard bias and dome flat sequence

# evening standard stars

# run ObsTac queue

# Standards carried out

# handover to 2nd half

 

*Conditions*

 

# weather in afternoon: 4pm (local): Clear save for edge of horizon

# weather after dinner: 7pm (local): Clear save for horizon

# weather summary: 2am (local): 

# Seeing conditions: Median:0.94   RMS: 0.15

# Wind conditions: low, 8-9 mph peak, closed louvers at UT 02:30, after this the wind fell off

 

*Accomplishments*

 

# Afternoon: zeros done 275894-275904 and 275980-275988, (ugriz) dome flats done 275905-275979, checked all ok, but u was lower than expected

# Winner of post sunset leisure activity: Denver Broncos and Seattle Seahawks

# Evening: Standards 275992-275996, then 276000-276016

# Survey Exposures 276031-276098

# SN exposures 276019-27603003

# Middle of night (end of half night): Standards 276099-276103

 

 

*Problems tagged as Synopsis_Problem*

 

None.

 

*Minor Problems and Relevant Information*

 

# Occlusion alarms: 2 alarms during the night.

# Original pointing solution was good, but when we went to first standards (images 275894-275904) we had 0.5 arcmin offsets in RA and Dec. Repeated high-airmass standards but still had same offset issue (images 276000-276004).

# Offsets in Dec happened during a few exposures starting w/ 276032 and performed a reset at 276047

 

*Notes for Data Management*

 

# Original pointing solution was good, but when we went to first standards (images 275894-275904) we had 0.5 arcmin offsets in RA and Dec. Repeated high-airmass standards but still had same offset issue (images 276000-276004).

#  Offsets in Dec happened during a few exposures starting w/ 276032 and performed a reset at 276047 and final night standards 276099-276103

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Second part of the night very smooth