4MOST team on Paranal

Between 2019-06-21 and 2019-07-01, the 4MOST project visited the Paranal Observatory. The overall purpose of this mission was to verify the VISTA telescope interfaces, to hone the AIV plan, and to discuss technical issues with the relevant Paranal staff. The mission was quite successful, and all the items on the list could be checked off. The team, consisting of Jeff, Marco and Christophe from ESO, Michael from MPIA, and Steffen, Allar, and Joar from the AIP were able to witness the removal of the VISTA primary and secondary mirrors for re-coating. To this end the telescope top end plus VIRCAM with its cable de-rotator had to be removed, which allowed us to access all relevant interfaces and to make laser tracker measurements. In addition, the HRS and LRS interfaces were inspected and surveyed. We were able to present 4MOST and discuss the project with several Paranal staff members. Special thanks to Jeff and Christophe for their great support before and during the visit!

In front of the VISTA telescope, from left to right: Allar Saviauk, Joar Brynnel, Steffen Frey (all AIP), Michael Lehmitz (MPIA), Jeff Pirard, Christophe Dupuy, and Marco Quattri (all ESO). In the background to the right you can see the VLT.

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