MDM Observatory 1.3m Telescope Observing Report for 2020 Nov 18

Observer(s): Yuming Fu, Jiangtao Li
Institution(s): PKU, UMich

Instrument: CCDS

Worked for 11 hours (all night)
Conditions were Non-Photometric most of the night.
Problems were encountered, see the separate trouble report for details.

Seeing and Weather:
   Beg: Seeing 2.1 arcsec, Clear, Winds Calm
   Mid: Seeing 2.1 arcsec, Clear, Winds Calm
   End: Seeing 2.1 arcsec, Clear, Winds Calm

Observing Summary:

The observation went smoothly. The seeing is poorer
compared to that of last night. I used the TCS panel and slit viewer to 
focus the telescope and found the best focal length to be the preset 890
mil. I'm not sure if this is the right way to focus the CCDS spectrograph...

After this adjustment, the widening along the spatial axis of the 2d spectra
still exists (same problem of last night). Such widening does not affect 
the source identification but may lead the underestimation of the fluxes.   


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Submitted on 2020 Nov 19 [9:19:23]