ESO Period 111 Proposal Submission Statistics

Published: 31 Oct 2022

The deadline for proposal submission for Period 111 (1 April 2023 - 30 September 2023) was 27 September 2022: 824 valid proposals were submitted, with no Large Programme as P111 is an odd period.  On the VLT, the most requested ESO instrument was MUSE with a request of 231 nights, followed by X-Shooter with 194 nights. HARPS on the ESO 3.6-metre telescope was the most demanded instrument at La Silla (and fourth most demanded instrument overall), with 130 nights. The new instruments  ERIS  and NIRPS got requests of 77 and 97 nights respectively.

In Paranal, the telescope with the highest oversubscription is Yepun (UT4), with a total request of 346 nights, closely followed by Melipal (UT3; 338 nights). As in P110, 90% of programmes requested Service Mode in P111 at the VLT. 

The distributed peer review (DPR) in P111 followed the setup introduced in P110. Thus the DPR channel processes proposals requesting a total telescope time of 16h or less, and will evaluate 50% of all submitted proposals, covering 19% of all the requested time. The rest of the proposals will be reviewed by the Observing Programmes Committee.

The percentages of submitted proposals across science categories were:

  • Cosmology and Intergalactic Medium 9.8%
  • Galaxies  24.3%
  • ISM, Star Formation, and Planetary Systems 35.1%
  • Stellar Evolution 30.3%