Night report 2021-04-17

Observers: Michel Dennefeld

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

TAT: Roberta Carini, Claudia Gutierrez, Janet Chen

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

EFOSC Calibrations:

Bias, dome_flats, arcs.

Evening: Skyflats Vgri

Morning: arcs, Dome Flats

Weather:

Start: humidity 23%, wind 2.8m/s, seeing ... DIM out of service

Middle: humidity 25% wind 6.2m/s, seeing 0"55 (DIM works again)

End: humidity 20% wind 5.0m/s, seeing 0"8 (DIM), 1"2 (image)

Comments:

00 : 02 Image analysis (Not done at the beginning, only Hartman focus)

Slit 1"0 X-position 992

EFOSC

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

23:26 Atlas21jfp SN2021heh Follow-up Gr#13 1"0 1200 sec 1.7 SN and Nucleus in the slit

00:00 Image analysis

00:50 Atlas21lhz AT2021iex Classific. G13 1"0 1800 1.38 1"1 Seeing measured on acquisition image

01:29 Atlas21mtr AT2021jlr Class G13 1"0 1500 1.87

02:05 LTT3218 ------ Standard G13+11+16 1"5 1.18

02:35 Atlas21jmk AT2021hqe Class G13 1"0 2000 1.50 Focus redone before exposure

03:40 Atlas21mwk AT2021jvi Class G13 1"0 1800 1.15 0"9 Seeing measured on acquisition image, after image analysis

04:16 Atlas21dwl SN2021cgu Follow G13 1"0 1800 1.47 0"9

04:55 Atlas21hra SN2021fmu Follow G11+16 1"0 2x1800 1.51 0"6 ! DIM measure (works again)

06:10 Atlaz20bhfe SN2020acat Follow G11+13 1"0 2x1500 1.57

07:18 Atlas21mdm SN2021iso Follow G11 1"0 1800 1.95 Gr11 only, too high AM (more tomorrow)

08:01 Gaia21bxd AT20221jzb Class G13 1"0 900 1.48 Trial, as a filler, not clear what it is (star ?)

08:26 MasterOT-J... AT2021gbs Class G13 1"0 2400 1.30 0"8 1"2 on image (focus redone before),

09:14 LTT7379 -------- Standard G11+13+16 1"0+1"5 1.04