MEGARA-GTC stellar spectral library: I

This work has been supported by MINECO-FEDER grants AYA2016-75808-R and AYA2016-79724-C4-3-P, and has been partially funded by FRACTAL, INAOE and CIEMAT. This work is based on observations made with the Gran Telescopio Canarias (GTC), installed at the Spanish Observatorio del Roque de los Muchachos, on the island of La Palma. This work is based on data obtained with MEGARA instrument, funded by the European Regional Development Funds (ERDF), through Programa Operativo Canarias FEDER 2014–2020. The authors are grateful for the support given by Dr Antonio Cabrera and Dr Daniel Reverte, GTC Operations Group staff, during the preparation and execution of the observations at the GTC. The authors acknowledge an anonymous referee for comments that have substantially improved the manuscript.