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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.

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select expref

Selects events based on exposure ID (Swift UVOT specific).

Syntax: 

xsel> select expref <exprefsel>

where exprefsel is a string of exposure specifiers given as numbers (1-99). This command extracts events for the exposure(s) into a new file and appends the appropriate GTI. If only one exposure is selected the GTI for the exposure is copied, if not the relevant GTIs are merged. Exposure specifiers should be separated by a space or a comma. This command also finds the minimum and maximum sky coordinates for the window used in the exposure sets the XYCENTER/XYSIZE appropriately.

Examples: 

xsel> select expref 4