First results of a cryogenic optical photon-counting imaging spectrometer using a DROID arrayR. A. Hijmering, P. Verhoeve, D. D. E. Martin, R. Venn, A. van Dordrecht and P. J. GrootA&A, 511 (2010) A59DOI: https://doi.org/10.1051/0004-6361/200913155