Night report 2022-05-04

Night Report May 04, 2022   EFOSC2

Observer:   Michel Dennefeld

Support: Mariusz Gromadzki, Nada Ihanec

TAT: Xinyue Sheng, Thomas Killestein, David O'Neill

Telescope Operators:  Cecilia Farias (day), Francisco Labraña  (night)

Calibrations:  Bias, Arcs, Spectral Flats in late afternoon

                  Sky Flats: U,B,V,R,i  evening sky

Night start:  UT 23:28 (end of Twilight) Sky clear, Moon setting, Hum 16%,  End of night: 09:53 UT (Twilight begins)

Image analysis on Std star LT3864   (start at 23:00) Seeing: 1"0

UT 23:15  Std LT 3864  Gr#13 +#11 + #16  (slit 1"5 only)

23:30 SN2022eux  Follow-up  Gr#11 2700s Seeing  1"0

00:24 AT2022jjt  Class   Gr#13  600s   0"9

00:44 SN2022qh  Fo-up  Gr#13  2700s

01:40  AT2022izq  Class  Gr#13  600s  Seeing 0"75  (careful, several objects in the slit close to center!  do'nt mix up)

01:58  AT2022ils  Class  Gr#13  900s

02:22  AT2022jkx  Class  Gr#13  1200s

02:50  AT2022cmc  Fo-up   Imaging (i band dithered)  seeing 1"2 (but AM 2.20!) Guiding failure after 6 exposures

      Restarted the full series again (AM 2.15!)

04:04 SN2022frl  Fo-up  Gr#13  1200s

04:38  AT2022fzy  Class  Gr#13  1200s  0"80  Crowded field !

05:10  SN2021ahpl  Fo-up  Gr#16  2 x 1800s, FF at the end (second exposure weak, cirrus ?)

06:48  EG274  Std star  Gr #11+16+13 (1" slit) & 13 (1"5 slit)

07:07  AT2022jjf  Class  Gr#13  1200s  Seeing 1"0

07:36  AT2022jgu  Class Gr#13  900s

07:58  AT2022jja  Class  Gr#13  1200s   1"1

08:26  AT2022hru Class Gr#13  1000s (Cirrus)

08:49  AT2022jhn  Class Gr#13  1500s  0"8  Cirrus around

09:20  AT2022izg Class  Gr#13  1200s

09:45  AT2022iwt  Class (redone) Gr#13 1200s

Morning Sky Flats (g,r,i)   No Standard star because of cirrus