[Astro-mdm-report] MDM 1.3m Observing Report for 2025 Apr 19

[Galayda Eric]

Not really sure what is being stated here.  Came in and found that guiding was at least used last night.  Using comp lamps, checked to see how things looked and well, it looked a bit strange.  Unsure what we were seeing, pulled the camera & filter wheel and removed the bottom plate of the MIS.  All optics looked ok, but were dusty.  Cleaned guide optics and verified that the optical path looked to be what we were expecting.  Did also find that the Xe lamp was failing—changed that out and it is now OK.
Closed everything up but things still looked odd—almost like the camera was being vignetted.  But did not notice any obstructions in the light path when it was all opened so I started to wonder about the camera itself.  Pulled the camera and when its lens tube was removed, found that the FLI camera shutter has failed.  The petals simply flop around.  Testing verified that user control does nothing.  Swapped in the spare FLI camera and all appears well again.
End points to note:
This was the noisier of the two guide cameras, so this also deals with that issue.  That said, the camera still seems reasonably functional so I will check with FLI to see if the shutter assembly is worth repair.
The spare FLI installed was my only spare.  So this can get added to the list of items that are getting a bit more stressful on the list of failures.  

****************************************************** 
ERIC GALAYDA 
Site Manager
MDM Observatory
950 N. Cherry Ave.          Ph. 520.318.8660
Tucson, AZ 85719           email: egalayda at umich.edu      
https://urldefense.com/v3/__http://mdm.kpno.noirlab.edu__;!!KGKeukY!w3sYrIR12-e_gvCXZR00kYOSDGjGNztNP0_Kml6P1xH5FXGwwDRxPJYoN5Kc-mDRBA0nzBuXa-i5GFcbYenhdsN7t_cnI0o$ 
******************************************************

> On Apr 20, 2025, at 6:34 AM, obs13m--- via ASTRO-mdm-report <astro-mdm-report at lists.osu.edu> wrote:
> 
> MDM Observatory 1.3m Telescope Observing Report for 2025 Apr 19
> 
> Observer(s): Wei Hu  Huiyang Mao 
> Institution(s): PMO
> 
> Instrument: Templeton
> 
> Worked for 10 hours (all night)
> Conditions were Photometric most of the night.
> Problems were encountered, see the separate trouble report for details.
> 
> Seeing and Weather:
>   Beg: Clear, Winds Calm
>   Mid: Clear, Winds Calm
>   End: Clear, Winds Calm
> 
> Observing Summary:
> 
> Star guiding problem: the position of the guide star in the 
> workspce2 is offset with about 2000 in x axis, 1000 in y axis.
> Everything else is good. 
> 
> 
> ------------------------------
> 
> Submitted on 2025 Apr 20 [6:34:06]
> 
> Observer Contact Email: hymao at pmo.ac.cn (Note: will not appear in versions of the report archived online)
> _______________________________________________
> ASTRO-mdm-report mailing list
> ASTRO-mdm-report at lists.osu.edu
> https://lists.osu.edu/mailman/listinfo/astro-mdm-report 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osu.edu/pipermail/astro-mdm-report/attachments/20250421/41762660/attachment-0001.html>