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Night Report 2021-05-04

Observers: Emmy Paraskeva, Miika Pursiainen
Support: Daniele Malesani, Giorgos Leloudas
TAT: Lluís Galbany, Roberta Carini, Shubham Srivastav

EFOSC Calibrations: 
Bias, dome_flats, arcs.


Weather:
Start: Humidity 80-95 %, wind 5-10m/s, Passing clouds
Middle:
Humidity ~60-80%, Wind ~10m/s, thin clouds, seeing 1.5-2.0
End: Humidity ~80%, Wind ~10m/s, thin clouds

Comments:
--- Weather very poor to start with, but at 01:30 UT the humidity started dropping fast
--- The humidity dropped down to ~55% but started gradually increasing. By 04:45UT it reached 75% and we made the decision to prioritise short classifications over longer follow-up targets due to the risk of immediate telescope closure.


EFOSC



 UTTarget 
 TypeSetup SlitExposure (s)Airmass
Seeing 
Notes
23:15
TELESCOPE CLOSED






Telescope closed due to high humidity.
02:45 TELESCOPE OPENS
      Image analysis
03:00
ATLAS21nlkClassificationg131"1x300s1.3
1.6
Pre-peak Type Ia SN
03:15
SN2021fox Follow-up gr131"1x900s1.7
2.0
Seeing  worse than expected
03:40
SN2021fmuFollow-upgr131.5"1x2400s1.5
1.7
Slit increased to 1.5" and exposure time to 2400s
04:30
LTT3864STD


1.62.0

 04:50 ATLAS21npaClassification
g13 1.5" 1x900s
 1.41.7Type I supernova, possibly Type Ic or 91bg
 05:10 ATLAS21nmiClassification g13  1.5" 1x450s 1.62.0
ABORTED DUE TO HIGH HUMIDITY
 05:15 TELESCOPE CLOSED
      Telescope closed due to high humidity.
         
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