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To find and download HEASARC data in the cloud, you can use astroquery.heasarc or download our new tool, hark.

The HEASARC and NuSTAR teams are greatly saddened by the sudden passing of Katja Pottschmidt. Most recently Katja was the lead scientist for the NuSTAR Guest Observer Facility (GOF), a role she had supported for many years. During her science career she worked on many other high energy astrophysics missions and played an integral role in advancing our knowledge of the universe. She was a wonderful colleague and friend and will be keenly missed by all who knew her.

clear intensity

Clears the current intensity selection. Again, you can choose 'all', or last, or give a file list. The files are all named xsel_intensity_gtinnn.xsl.

There is one slightly non-obvious point here: the following sequence


xsel > extract curve
xsel > filter intensity 0.5-0.9
xsel > extract all
...
xsel > clear intensity
xsel > filter intensity 1.0-1.5


will result in all the data being eliminated. The reason is that the clear intensity clears the GTI's, but the next filter intensity acts upon the lightcurve which was produced with these GTI's.

To produce the desired effect, instead do


xsel > extract curve
xsel > filter intensity 0.5-0.9
xsel > extract all
...
xsel > clear intensity
xsel > extract curve
xsel > filter intensity 1.0-1.5