TableViewer for Herschel Data Processing

摘要

The TableViewer utility is a GUI tool written in Java to support interactive data processing and analysis for the Herschel Space Observatory (Pilbratt et al. 2001). The idea was inherited from a pro-totype written in IDL (Schulz et al. 2005). It allows to graphically viewand analyze tabular data organized in columns with equal numbers ofrows. It can be run either as a standalone application, where data accessis restricted to FITS (FITS 1999) files only, or it can be run from theQuick Look Analysis(QLA) or Interactive Analysis(IA) command line,from where also objects are accessible. The graphic display is very versa-tile, allowing plots in either linear or log scales. Zooming, panning, andchanging data columns is performed rapidly using a group of navigationbuttons. Selecting and de-selecting of fields of data points controls theinput to simple analysis tasks like building a statistics table, or generatingpower spectra. The binary data stored in a TableDataset 1, a Produceor in FITS files can also be displayed as tabular data, where values inindividual cells can be modified. TableViewer provides several processingutilities which, besides calculation of statistics either for all channels orfor selected channels, and calculation of power spectra, allows to con-vert/repair datasets by changing the unit name of data columns, and bymodifying data values in columns with a simple calculator tool. Interac-tively selected data can be separated out, and modified data sets can besaved to FITS files. The tool will be very helpful especially in the earlyphases of Herschel data analysis when a quick access to contents of dataproducts is important.