title: Compact low resolution spectrograph, an imaging and long slit spectrograph for robotic telescopes.
abstract: The COmpact LOw REsolution Spectrograph (COLORES) is a compact and lightweight (13 kg) f/8 imaging spectrograph designed for robotic telescopes, now installed and operating on the TELMA, a rapid-slewing 60 cm telescope of the BOOTES-2 observatory in Málaga (Spain). COLORES is a multi-mode instrument that enables the observer to seamlessly switch between low-dispersion spectroscopy and direct imaging modes during an observation. In this paper, we describe the instrument and its development, from the initial scientific requirements through the optical design process to final configuration with theoretical performance calculations. The mechanical and electronic design is described, methods of calibration are discussed and early laboratory and scientific results are shown.
authors.affiliation: Department of Civil Engineering, University of Granada, Severo Ochoa Str. s∕n, 18071 Granada, Spain.
authors.forename: O
authors.initials: O
authors.lastname: Rabaza
authors.forename: M
authors.initials: M
authors.lastname: Jelinek
authors.forename: A J
authors.initials: AJ
authors.lastname: Castro-Tirado
authors.forename: R
authors.initials: R
authors.lastname: Cunniffe
authors.forename: J
authors.initials: J
authors.lastname: Zeman
authors.forename: R
authors.initials: R
authors.lastname: Hudec
authors.forename: L
authors.initials: L
authors.lastname: Sabau-Graziati
authors.forename: J
authors.initials: J
authors.lastname: Ruedas-Sánchez