Spectrum

This procedure produces Figure , a plot of a low resolution IUE spectrum extracted by IUEDR (SUN/37) and written using the IUEDR command OUTSPEC SPECTYPE=2. The output file was subsequently edited to make the file label lines PONGO comments and to add a line of PONGO column labels (see §) at the beginning of the file. IUEDR indicates bad or missing data in an output spectrum by attributing zero fluxes to the affected wavelength samples. These can be detected and discarded using the SELCOND parameter of the READF command: e.g.

PONGO> readf (SWP_DATA) selcond="Flux > 0.0" noall

In this example PONGO draws a polyline across all missing data flagged by IUEDR.

Figure: SPECTRUM