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Night Report 2018-12-31

Observers:  Alessandro RazzaJonathan  Pineda Garcia
Support: Mariusz Gromadzki
TAT:  Cosimo Inserra & Lluís Galbany

Calibrations:
EFOCS:
biases
arcs gr11, gr13, gr16 (evening & morning)
arcs gr18 and gr20 (evening)


Weather:
Start: Humidity 37.8, wind speed 3.4 m/s.
Middle:  Humidity 36.9 ,wind speed 1.4 m/s.
End:  Humidity 41.2 ,wind speed 3.3 m/s.  Thin clouds.

Comments: Good seeing. Low thin clouds  from UT  05:45 up the end of the night. 

Instrument - EFOCS

UT            Target               Type                Setup                airmass             Seeing               notes
-----------------------------------------------------------------------------------------
00:44   AT2018fyk    Follow-up    gr13         1.48         0.8
01:36   GD71         STD          gr11+13+16*  1.79         1.0
02:13   AT2018jmt    Follow-up    gr16         1.32         0.8
03:13   AT2018jmt    Follow-up    gr11         1.22         0.7
04:07   AT2018kzr    Follow-up    gr11         1.44         0.8       
04:56   AT2018kzr    Follow-up    gr11         1.27         0.8
05:44   AT2018kzr    Follow-up    gr16         1.18         1.0        
06:45   AT2018kzr    Follow-up    gr16         1.16         1.0          Exposure with passing thin clouds.
07:49   LT3864       STD          gr11+13+16** 1.02         1.0
08:03   AT2018hyz    Follow-up    gr11         1.17         1.0
  
* slit 1.0 - 1.5
**slit 1.0
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