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CTIO Home > ENR CTIO Blanco 4-m 2025-09-04

ENR CTIO Blanco 4-m 2025-09-04

Date: 
Thursday, September 4, 2025
Telescope: 
CTIO Blanco 4-m
Submitter: 
Sean Points
Submitter Email: 
sean.points@noirlab.edu
Observer Support: 
Hernan Tirado
Night Assistant: 
Alberto Alvarez
Also Present: 
Rodrigo Hernandez, Roberto Aviles
Problems: 

At the beginning of the noght, the nffocus script was giving a bad value for best focus.  I had to try a couple of fields to get it working. This was only a problem because it was storing the incorrect focus value and using that to perform the focus offsets when changing the filters.  Where is this value stored so that an observer can just edit the file file using a focus value determined by eye?

Comments: 

Took some 1644 and HX images of galactic SNR W28.  After performed donut tests and tests imaging one field for 1.5 hours to determine when it becomes necessary to perform a force_correction.

Conditions: 
General Conditions
Comment: 
None.
1st Quarter
Clouds: 
Clear
Seeing Value: 
1.50
Seeing Variability: 
0.4
Seeing Source: 
CTIO Seeing monitor
Sky : 
0
2nd Quarter
Clouds: 
Clear
Seeing Value: 
1.20
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
3rd Quarter
Clouds: 
Clear
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
CTIO Seeing monitor
Sky: 
0
4th Quarter
Clouds: 
Clear
Seeing Value: 
1.00
Seeing Variability: 
0.2
Seeing Source: 
The Telescope I used
Sky: 
0
  • Delete
  • Edit
Program: 
Proposal: 
newfirm_default
Target of Oportunity: 
No
Time Observed: 
0.0
Time Engineering: 
10.0
Time lost technical: 
0.0
Time lost weather: 
0.0
Time lost other: 
0.0
Description: 
NEWFRM Engineering
Primary Investigator: 
Points
Email: 
sean.points@noirlab.edu [1]
Institution: 
CTIO
Instrument: 
CTIO 4m Newfirm
Organization: 
NOAO
Total Program Time: 
10
Total Times Time Observed Time Engineering Time lost technical Time lost weather Time lost other Total Program Time
2025-09-04 0.0 10.0 0.0 0.0 0.0 10
Source URL (modified on 09/05/2025 - 07:12): http://www.ctio.noao.edu/noao/content/ENR-CTIO-Blanco-4-m-2025-09-04

Links
[1] mailto:sean.points@noirlab.edu
[2] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/44629/delete?destination=print/node/23135
[3] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/44629/edit?destination=print/node/23135
[4] http://www.ctio.noao.edu/noao/field-collection/field-nr-prog/add/node/23135?destination=print/node/23135