The HEASARC is running nominally. If you are trying to download a lot of data, please consider using the AWS cloud copy of most HEASARC data. As an alternative to locally installing HEASoft, SciServer is an online platform which has the software installed and data available when you login.
plot
Plot light curve, images, spectra,...
Plots spectra, light curves, images, HK and MKF parameters.
xsel > plot <plot_what>
Plot curve also allows the user to enter timing selections graphically. Plot image allows you to construct region files.
Subsections