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.
systematic
add a model-dependent systematic term to the variance
| Syntax: | systematic | [<modelName>] <model systematic error> |
|---|
Set a systematic error term on the model to be added in quadrature to that on the data when evaluating chi-squared. The default value is zero.
If no <modelName> argument is given, then the <model systematic error> value becomes the default value for all current models and any models defined in the future. But if a <modelName> is specified, the value will only apply to that model and it will override the default systematic error setting.
The <modelName> argument can be specified only if a model with that name already exists. To set a value specifically for the default model (which has no name), <modelName> should be unnamed.