ESO Period 100 Proposal Submission Statistics

Published: 05 Apr 2017
Paranal twilight sky

The deadline for proposal submission for Period 100 (1 October 2017 – 1 April 2018) was 30 March 2017. 895 valid proposals were submitted, including 16 Large Programmes, of which one is a GTO Large Programme. The number of proposals for P100 is very similar to that of periods 91 (893), 92 (892), 93 (898), 94 (901), 98 (901) and 99 (887). This indicates a return to a steady situation following the peak observed in periods 95 (934), 96 (960) and 97 (1024), corresponding to the deployment of MUSE and SPHERE. The total time request also remained very similar to the steady state, with the total number of distinct scientists exceeding 3500.

On the VLT the most requested ESO instrument was X-shooter with 287 nights, followed by MUSE with 266 nights, and FORS2 with 196 nights. HARPS on the ESO 3.6-metre was the most demanded instrument at La Silla, with a request of 261 nights. The telescope with the highest oversubscription is UT2-Kueyen, with a total request of 525 nights, followed by UT4-Yepun (396 nights), UT1-Antu (328 nights) and UT3-Melipel (279 nights). On account of the two running Public Spectroscopic Surveys on UT3 (LEGA-C and VANDELS), no Large Programmes were offered on this telescope in P100.

The percentages of submitted proposals across science categories were:

  • Cosmology 21.2%
  • Galaxies & Galactic Nuclei 17.4%
  • ISM, Star Formation & Planetary Systems 30.8%
  • Stellar Evolution 30.6%.

Following the steady trend observed for many years, the request for Service Mode kept growing, exceeding 85% in P100.

The proposals will be reviewed by the Observing Programmes Committee, which meets in May. Proposers will be informed of the outcome of the review process at the beginning of July 2017.