OSIRIS (Optical System for Imaging and low Resolution Integrated Spectroscopy) is designed as an optical Day One instrument for the GTC. This versatile instrument will be able to perform broad band and tunable filter imaging, low resolution long slit and multiple-object spectroscopy, and fast spectrophotometry. In this paper we outline the main

We conduct a detailed comparison between the kinematics, morpology and excitation conditions of the RW Aur microjet on scales < 200 AU with predictions from stationary, self-similar, cold disk wind solutions. Implications for launching and ionization mechanisms of jets in young stars are discussed.

Using archival HST/WFPC2 imaging of 7 LMC globular clusters, and following the methods outlined in our previous study, we have reached the tightest constrain so far on their age dispersion, which cannot be greater than ~ 0.5 Gyr. We also confirm earlier results that their average age is comparable to that of the metal-poor Galactic globulars

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Extensive characterisation of subsystems such as detectors and their curing, preamplifiers, filters, on-board secondary standard sources and cryomechanisms were the basis for the understanding of the assembled instrument and the development of a dedicated CALibration FACility for ISOPHOT. In the CALFAC the instrument was fully calibrated and the

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