The fitting routines in MIDAS were developed in close collaboration with O. Richter and later upgraded by Ph. Defert. The INVENTORY programs were developed and written by A. Kruszewski during his extended visits to ESO. The multivariate statistical package has been developed in close collaboration with F. Murtagh. The package for 1-dimensional spectral reductions was designed and tested in collaboration with D. Baade and M. Rosa. The ROMAFOT package for crowded field photometry was developed by R. Buonanno, C. Buscema, C. Corsi, I. Ferraro, and G. Iannicolo at the Osservatorio Astronomico di Roma. The implementation of ROMAFOT in MIDAS was done in collaboration with R. Buonanno. M. Tapia and A. Moneti collaborated in the development of the IRSPEC reduction package. Marguerite Pierre developed modelling commands for interstellar absorption work and contributed to the Long Slit package. P. Stetson created a MIDAS compatible version of DAOPHOT-II.
The digital filter to remove cosmic ray events from single frames was contributed by P. Magain and M. Remy. Several routines used in the COMPUTE command for calculations of airmass, barycentric correction, ST, UT and Julian data were kindly made available by D. Gillet. The FILTER/ADAPTIVE command was kindly provided by G. Richter. The OPTOPUS context was implemented by A. Gemmo. The PISCO context was implemented by M. Schloetelburg and O. Stahl. The astrometry context ASTROMET was made available for MIDAS by O. Hainaut. The original code was written by R. West.
Significant contributions were also added in the application area. A number of important applications were made by ESO La Silla (or in close collaboration with them) such as the new Long Spectral Package and the XAlice graphic user interface for spectral analysis.The IRSPEC reduction was revised by E. Oliva, while an image restoration and co-addition application, based on ideas of L. Lucy, was added by R. Hook (ST-ECF). A Time Series Analysis context, which includes analysis of non-equally spaced data, was made by A. Schwarzenberg-Czerny. The Wavelet package was implemented by J. L. Starck and contains both general routines for wavelet transforms and special applications e.g. for deconvolution. Finally, the PEPSYS context was introduced by A.T. Young as the first application in a new context for calibrations of point-source photometry.