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ENR CTIO Blanco 4-m 2017-09-19

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Date: 
Tuesday, September 19, 2017
Telescope: 
CTIO Blanco 4-m
Submitter: 
David Herrera
Submitter Email: 
herrera@noao.edu
Observer Support: 
Manuel Hernandez
Night Assistant: 
Claudio Aguilera
Also Present: 
Alistair Walker, Claire Poppett (remotely from Tucson)
Problems: 

None.

Comments: 

An alarm peppered the night for some periods, complaining about filter humidity going above 5.0% (see FCM humidity for the night), but it didn't reach more than 6.5%, so Alistair advised not to worry.

Also another alarm was the 'You are in the Occlusion Danger Zone' when an exposure started before the slit opening was centered, but most likely didn't actually affect the field of view.

Conditions: 
General Conditions
Temperature Max: 
10.00
Temperature Min: 
4.00
Humidity Max: 
55
Humidity Min: 
23
Wind Speed Max: 
45.00
Wind Speed Min: 
5.00
Comment: 
Very gusty winds
1st Quarter
Clouds: 
Clear
Wind: 
High
Seeing Value: 
1.80
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky : 
1
2nd Quarter
Clouds: 
Thin Clouds
Seeing Value: 
1.70
Seeing Variability: 
0.6
Seeing Source: 
The Telescope I used
Sky: 
2
3rd Quarter
Clouds: 
Overcast
Wind: 
High
Seeing Value: 
2.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
7
4th Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
1.80
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
1
Program: 
Proposal: 
2014B-0404
Target of Oportunity: 
No
Time Observed: 
7.5
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
3.0
Time lost other: 
0.0
Description: 
The DECam Legacy Survey of the SDSS Equatorial Sky (DECaLS)
Primary Investigator: 
David Schlegel
Email: 
djschlegel@lbl.gov
Institution: 
Lawrence Berkeley National Laboratory
Instrument: 
CTIO 4m DECam
Organization: 
N/A
Total Program Time: 
10.5
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2017-09-19 7.5 0.0 0.0 3.0 0.0 10.5