ENR CTIO Blanco 4-m 2014-12-22

*Observing Team*

 

_DES Observers:_ Rutuparna Das (RM), Anthony Kremin (Obs1), Ross Cawthon (Obs2)

_Telops:_  Alberto Alvarez, Hernan Tirado

_Remote Support:_ 

 

*Observing Plan*

 

# standard bias and dome flat sequence

# sequence of dark images

# evening standard stars

# defocus script

# run ObsTac queue

# morning standard stars and bias

 

*Conditions*

# 1:00 Conditions have been pretty constant for most of the evening. Pretty low wind (5-6 mph), seeing between 0.6-0.8 on DIMM, 1-1.4 on the images. Started with 2 SN and widefield since.

# 3:00 Conditions mostly stable. DIMM seeing has stayed around 0.6-0.8, images 1-1.4. Briefly had higher winds (>10) and windscreen went up, but went down after less than an hour.

#End of night: Seeing remained around 0.6-0.8. No clouds. Winds were high since about 03:30 and stayed high the rest of the night with the windscreen up.

 

 

*Accomplishments*

 

# Afternoon: zeros, dome flat sequence (YziVRrgu), new nightly sequence of darks.

# Evening: Standards Maxvis (390457-390461), SDSSJ2300 (390462-390466), SDSSJ0200 (390467-390472)

# Overall: SN: X1, X2 (390474-390485)     Wide Survey: (390486-390628, 390634-390680)

# Morning: Standards E6-A (390681-390865), SDSSJ1227 (390686-390690), SDSSJ0958 (390691-390695)

 

*Problems tagged as Synopsis_Problem*

 

*Minor Problems and Relevant Information*

 

# RASICAM was under maintenance first half of the night. Online and working about 2:30 and later.

 

#At 03:36, we had an issue where the inflatable cushions under the primary mirror had lost some air and sagged a bit, causing the guide stars to malfunction and a 'no active CCDs' alert. We took a few minutes to reinflate and then started taking data again. Exposures 390629-390631 we believe are compromised (but they look really cool!).

 

*Notes for Data Management*

 

#Exposures 390629-390631 should fail. 632-633 are new pointings.