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CTIO Home > ENR CTIO Blanco 4-m 2017-06-30

ENR CTIO Blanco 4-m 2017-06-30

Date: 
Friday, June 30, 2017
Telescope: 
CTIO Blanco 4-m
Submitter: 
Alfredo Zenteno
Submitter Email: 
azenteno@ctio.noao.edu
Observer Support: 
Alfredo Zenteno
Night Assistant: 
Alberto Alvarez
Also Present: 
Manuel Hernandez
Problems: 

Interlock broken at 22:29 CLT.  A temperature sensor jumped from -200 to 800 and then back to -200 C, changing the average T value, triggering a safeguard.  The temperature measurements were fals, it was a false alarm according to Marco Bonati.  We were back at 10:52 CLT.

From Marco Bonati:

All is OK. This is a false alarm caused by a defective RTD that generate spureous readings. This RTD ws taken out f the PID loop long ago, meaning that the misreading does not generate a real change in temperature by the PID. However, it is still used to get the average temperature, and this is why the alarm and interlocks are generated. Note that fixing this is one of the things in the list to fix for the upcoming warmup.
 

Comments: 

None.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Seeing Value: 
1.00
Seeing Variability: 
0
Seeing Source: 
The Telescope I used
Sky : 
0
2nd Quarter
Clouds: 
Clear
Seeing Value: 
1.10
Seeing Variability: 
0
Seeing Source: 
The Telescope I used
Sky: 
0
3rd Quarter
Clouds: 
Clear
Wind: 
Low
Seeing Value: 
1.30
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
4th Quarter
Clouds: 
Clear
Wind: 
Medium
Seeing Value: 
1.30
Seeing Variability: 
0.4
Seeing Source: 
The Telescope I used
Sky: 
0
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Program: 
Proposal: 
2017A-0910
Target of Oportunity: 
No
Time Observed: 
5.5
Time Engineering: 
0.0
Time lost technical: 
0.25
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
Catching Supernovae in the Act with KEGS (Kepler Extra-Galactic Survey) and DECam
Primary Investigator: 
Brad Tucker
Email: 
brad@mso.anu.edu.au [1]
Institution: 
ANU
Instrument: 
CTIO 4m DECam
Organization: 
N/A
Total Program Time: 
5.75
Proposal: 
2016A-0397
Target of Oportunity: 
No
Time Observed: 
0.0
Time Engineering: 
0.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
Setting the Scale: Determining the Absolute Mass Normalization and Scaling Relations for Clusters at z~0.1
Primary Investigator: 
Anja von der Linden
Institution: 
Stony Brook University
Total Program Time: 
0
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2017-06-30 5.5 0.0 0.25 0.0 0.0 5.75
Source URL (modified on 07/01/2017 - 06:17): http://www.ctio.noao.edu/noao/node/12096

Links
[1] mailto:brad@mso.anu.edu.au
[2] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/4044/delete?destination=print/content/enr-ctio-blanco-4-m-2017-06-30
[3] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/4044/edit?destination=print/content/enr-ctio-blanco-4-m-2017-06-30
[4] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/4045/delete?destination=print/content/enr-ctio-blanco-4-m-2017-06-30
[5] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/4045/edit?destination=print/content/enr-ctio-blanco-4-m-2017-06-30
[6] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/add/node/12096?destination=print/content/enr-ctio-blanco-4-m-2017-06-30