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ENR CTIO Blanco 4-m 2014-01-11

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Date: 
Saturday, January 11, 2014
Telescope: 
CTIO Blanco 4-m
Submitter: 
Armin Rest
Submitter Email: 
arest@stsci.edu
Observer Support: 
Hernan Tirado
Night Assistant: 
Claudio Aguilera
Also Present: 
Philip Rooney, Claudio Bruderer, Kathy Romer / Armin Rest, Kathy Vivas (remote)
Problems: 

First half: Several oclusion alarms, and one shutter alarm.

At change over: things went badly wrong - exposure was taken during a slew. TelOps was not able to bring the system back on line. Hernan had to come back. This was exposure 273433. It turns out that the air pressure was down. Total lostt ime was about 75 minutes.

Comments: 

DES half night followed by A. Rest

-------------COMMENTS FROM DES-------

*Observing Team*
 
_DES Observers:_ Philip Rooney, Claudio Bruderer, Kathy Romer
_Telops:_ Hernan Tirado, Claudio Aguilera
_Remote Support:_ ---
 
*Observing Plan*
 
# standard bias and dome flat sequence
# evening standard stars
# run ObsTac queue
# middle/end of the night standard star 
# handover to community observers
# end of night calibrations 
 
*Conditions*
 
# weather in afternoon: 5pm (local): clear
# weather after sunset: 9pm (local): sky clear, haze on Razicam on S & E horizon
# weather during night: 10:30pm (local): clear above; but haze to 20 deg elevation in all directions, esp. S (same 00:00, 01:50)
# Seeing conditions: Median 0.88 RMS 0.19
# Wind conditions: 5.7mph (30m av) from S 
 
 
*Accomplishments*
 
# Afternoon: zeros, dome flats (ugriz). 
# Evening: Standards (SDSSJ0000, SDSSJ0100, SDSSJ0320) 
# Survey Exposures 273343-273426
# SN exposures 273327-273342
# Middle of night: Standard (SDSSJ1048)
 
 
*Problems tagged as Synopsis_Problem*
 
 
*Minor Problems and Relevant Information*
# Occlusion alarms: 273335, 6.31 delta, Zd=35.71; 273340, 6.32 delta, Zd=40.49; 273353, 6.29 delta, Zd=43.65; 273377, 6.44 delta, Zd=36.5; 273379, 7.16 delta, Zd=39.47; 273383, 7.57 delta, Zd=36.54; 273410, 7.41 degree delta, Zd = 43.31 degree
# Exp 273334 (S7,N7 etc) has satellite trail or plane (spotted on comfort display)
#Shutter alarm at 00:58 (ish) local time
#Tarantula in break room alarm at 01:20 (gently returned to the wild by TelOps)
 
*Notes for Data Management* 
#273401 lost due to Shutter alarm (no file on disk)
#Exposures 273121 to 273141 from last night (01.10.14) ARE NOT DES - they were put into our directory by mistake by the Community Observer.
 

-------------END OF COMMENTS FROM DES-------

Besides the air pressure issue at the beginning of the second half uneventful night.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Seeing Value: 
0.70
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky : 
0
2nd Quarter
Clouds: 
Clear
Seeing Value: 
0.50
Seeing Variability: 
0
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
3rd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
0.75
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
4th Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
0.75
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
Program: 
Proposal: 
12B-0001 and 13B-0421
Target of Oportunity: 
No
Time Observed: 
6.75
Time Engineering: 
0.0
Time lost technical: 
1.25
Time lost weather: 
0.0
Time lost other: 
0.0
Instrument: 
CTIO 4m DECam
Total Program Time: 
8
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2014-01-11 6.75 0.0 1.25 0.0 0.0 8