Optimisation of the WEAVE target assignment algorithm

TL;DR

This paper analyzes and optimizes the fibre assignment algorithm for the WEAVE spectroscopic facility, improving target allocation efficiency and prioritization for scientific observations.

Contribution

It presents an analysis and adjustment of the simulated annealing-based assignment algorithm to enhance fibre utilization and target prioritization.

Findings

Optimized fibre assignment increases total targets allocated.

Adjusted priority algorithm improves high-priority target coverage.

Analysis informs science team planning and data quality.

Abstract

WEAVE is the new wide-field spectroscopic facility for the prime focus of the William Herschel Telescope in La Palma, Spain. Its fibre positioner is essential for the accurate placement of the spectrograph's ~960-fibre multiplex. To maximise the assignment of its optical fibres, WEAVE uses a simulated annealing algorithm called Configure, which allocates the fibres to targets in the field of view. We have conducted an analysis of the algorithm's behaviour using a subset of mid-tier WEAVE-LOFAR fields, and adjusted the priority assignment algorithm to optimise the total fibres assigned per field, and the assignment of fibres to the higher priority science targets. The output distributions have been examined, to investigate the implications for the WEAVE science teams.