With the advent of wide bandwidth and many spectral channels on the ALMA and NOEMA arrays, multi-spectral imaging requires handling large images of up to 100 000 channels. We developped
an easy-to-use, well documented, imaging tool to help astronomers in this process, IMAGER. Besides basic image reconstruction methods (Deconvolution, self-calibration, short spacing handling, mosaic processing), IMAGER is coupled to spectral line data bases to automate image generation for all relevant spectral lines that fall in the bandwidth coverage of the interferometric observations. It also incorporates advanced deconvolution technique, such as joint deconvolution at different velocity/frequency resolution. Polarization handling is possible. A PIPELINE command automates the whole process, once the end-user has defined the desired image characteristics. High speed is obtained through parallel programming.
Data from Casa can be transferred into IMAGER through a simple "casagildas()" plugin in Casa.