Night report 2025-04-05

Night report 2025/04/05

Observers: Chris Duffy, Melzie Ghendrih (Lancaster University)

Support:  Georgios Dimitriadis, Lydia Makrygianni, Andrew Milligan, Mathew Smith (Lancaster University)

TAT: Lluís Galbany (ICE-CSIC), Amit Kumar (University of Warwick), Priscila J. Pessi (Stockholm University)

Start: 23:28 UT | Humidity: 19.6 % | Wind speed: 10.3 m/s | Seeing: 1.50

Midway : 05:45 UT | Humidity: 14.5 % | Wind speed: 12.2 m/s | Seeing: 1.70

End: 09:40 UT | Humidity: 16.1 % | Wind speed: 12.7 m/s | Seeing: 1.8

Afternoon Calibrations:

Darks, arcs and dome flats done in the afternoon

Sky flats done during twilight. All completed, although only 4 exposures in i-band

Notes

23:30UT: Based on first standard, swtiched to slit 1.5

04:13UT: rebooted instrument as link between instrument and telescope was lost

04:34UT: Instrument problems being diagnosed. Problem with lamp identified. Identified as issue with lamp shutters.

04:54UT: Resumed operations. Intermitent problem with lamp shutter indentified. Several flats taken, some failed some worked.