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LTO Report

Kitt Peak Nightly LTO Report For UT: 2019-04-20

Report Time (MST): 05:37                    For access to all LTO-Reports go to:

4 Meter Weather Averages
From: UT = 01:00 (MST=6:00 PM) To: UT = 13:00 (MST=6:00 AM)
Elements Mean High Low AvDev
Air Temperature (°C)16.020.313.31.6
Dewpoint Temperature (°C)-7.3-4.3-10.51.6
Relative humidity (%)2026122.5
Wind Speed (mph)25.838.46.86.3
Wind Direction (°)20261250.5
4M Dome Temperature (°C)15.519.813.11.4
4M Dome Dewpoint (°C)-4.6-2.9-6.60.7
4M Primary Mirror (°C)14.615.212.90.4

Weather Comments: Clear with mild to strong wind (15-28mph) out of the WSW. The 4m/Mayall reported gusts of 45mph.
Recognized Hours: ( 8.5 )      18 degree twilight + 0.5 hr.

Observer Information
Telescope Observer Prop. # Instrument Detector Seeing
4 MeterAbareshi, Eftekharzadeh, Elliott, Li, Rockosi and Summers --- DESI Commissioning N/A 1.3
WIYNGerber -remote- 2019A-0386 HYDRA STA1 1.2
2.1 MeterNo Observer --- N/A N/A N/A
FeedNo Observer --- N/A N/A N/A
0.9 MeterNo Observer --- N/A N/A N/A

Time Usage During The Night
Telescope Hours Used Night's Activity   Hours Lost Time Lost
Due To:
Time of
Night (MST)
8.5 T and E        
8.25 Scientific Research   0.25 Instrument Problem 20:00 - 04:30
0.0 Scientific Research      
0.0 Scientific Research      
0.0 Scientific Research      

Observing Status
4 MeterT&E:: Tracking and Flexure Test. Seeing around 1.3 arc-second most of the night.
WIYNHYDRA:: Seeing estimated using the fops between 0.9 and 1.7 arc-seconds, with a typical value of 1.2. Seeing improved as the night went on. One telescope drive trip when slewing to the second target in the middle of the night possibly due to the wind - minimal time lost. Various button errors during the three field configurations - see WIYN night report for details.
2.1 MeterNot Scheduled
FeedNot Scheduled
0.9 MeterNot Scheduled

CommentsA windy night on the mountain, but very productive for T&E and science nevertheless.

Reported by:Christian Soto

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