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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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eebremss: electron-electron bremsstrahlung spectrum

The emission due to electron-electron bremsstrahlug from a collisionally-ionized gas. Uses the approximations from Nozawa et al (2009). This component is already included in all the apec-derived models if APECEEBREMSS is xset to yes.

par1 plasma temperature, keV
par2 The number of electrons per H nucleus. The default is 1.2.
par3 Redshift, z
norm ${10^{-14}\over{4\pi[D_A(1+z)]^2}}\int n_en_HdV$, where $D_A$ is the angular diameter distance to the source (cm), $dV$ is the volume element (cm$^3$), and $n_e$ and $n_H$ are the electron and H densities (cm$^{-3}$), respectively