J. Pety (1,2), F. Gueth (2), S. Guilloteau (2,3), R. Lucas (2),
P. Teuben (4) and M. Wright (5)
1. LERMA, Observatoire de Paris
2. IRAM (Grenoble)
3. Observatoire de Bordeaux
4. Astronomy Department, U. Maryland
5. Radio Astronomy Laboratory, U.C. Berkeley
GILDAS and MIRIAD are two state-of-the-art data reduction packages for the current generation of millimeter instruments. GILDAS is used daily at the Plateau de Bure Interferometer (PdBI) as well as several single dish telescopes (e.g. IRAM-30m, CSO) while MIRIAD is used at BIMA, ATCA, OVRO and WSRT. Although the core functionalities needed to reduce millimeter interferometry data are well covered in both packages, it has recently been recognized that the strength of both packages are complementary. GILDAS has good data analysis programs while MIRIAD has a complete set of calibration and imaging algorithms in particular to handle polarization. It is thus interesting to study the possibility of interoperating both packages in a user-friendly way. Both packages have pretty different implementation philosophy: GILDAS is principally made of large stand-alone programs while MIRIAD is built around a large collection of individual tasks. Moreover, they use different command line interfaces and, in detail, data models. In a first step toward interoperability, we decided to run both packages under python and to exchange data using FITS.