Night report 2021-04-16

Observers: Michel Dennefeld

Support: Stefan Taubenberger, Christian Vogl, Andreas Floers, Geza Csoernyei, Alexander Holas

TAT: Roberta Carini, Claudia Gutierrez, Janet Chen

Operators NTT: Cecilia Farias (1st half), Javier Alarcon (2d half)

EFOSC Calibrations:

Bias

Evening: Skyflats UBVRi

Morning: Skyflats gri ; dome flats and arcs

Weather:

Start: humidity 23%, wind 2.5m/s, seeing 1"2 (DIM not working,measured on image) Some cirrus around

Middle: humidity 22% wind 3.1m/s, seeing .1"3 (on image)..

End: humidity 23% wind 2.1m/s, seeing ...0"9 (on image)

Comments:

TU 23 : 20 Image analysis (took long...)

Slit 1"0 X-position 992

EFOSC

UT Target IAU_Name Type Set-up Slit Exposure AM Seeing Notes

23:56 Gaia21bto AT2021iyz Class. Gr#13 1"0 1200 sec 1.24 1"2

00:27 Atlas20bgve SN2020abtf Follow G13 1"0 2x1500 1.51 Faint, Increased exp. time

01:40 Atlas21tmr AT2021jlr Class. Image only Object seen, but then clouds, no spectrum

02:00 SN2020acat Follow 0 Faint, not identified, no Finding Chart..!!

02:20 LTT3864 Standard G13+11+16 1.02 For relative response only

02:45 ZTF21aaspdzb AT2021ife Class G13 1"0 1200

ZTF21aarxjtd Class Object not seen

03:28 ZTF21aavqphe AT2021jvs Class G13 1"0 1500 1.59

04:00 ZTF21aavhlry AT2021jwl Class G13 1"0 1200 1.60 Nucleus of galaxy is also in the slit,clouds going...

04:30 Atlas21lpv AT2020iue Class G13 1"0 1200 1.60 1"3 measured on image

05:10 Atlas21mtv AT2021jtz Class G13 1"0 1500 1.60 Focus done before

05:40 Image analysis (could not be done before because of the clouds)

06:09 ZTF21aasbxmt ---------- Class G13 1"0 1200 1.09

06:50 Atlas21mbz AT2021jbi Class G13 1"0 1200 1.18 Images poor....

07:10 Image analysis 0"9 after image analysis

07:30 Atlas21iuc AT2021gba Class G13 1"0 1200 1.25

08:10 LTT7379 Standard G13+11+16 1"5 1.09

08:35 ZTF19absdufq --------- Class G13 1"0 1200 1.15 ? Loem down

09:00 Gaia21bwh AT21juw Class G13 1"0 1200 1.12