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.
xsect
set the photoionization cross-sections
Change the photoelectric absorption cross-sections in use.
| Syntax: | xsect | [bcmc|obcm|vern] |
|---|
The three options are: bcmc, from Balucinska-Church & McCammon
(1992)
with a new He cross-section
based on Yan et al. (1998);
obcm, as bcmc but with the old He cross-section,
and, vern, from Verner & Yakovlev
(1995)
and Verner et
al. (1996).
This changes the cross-sections in use for all absorption models with the exception of
wabs, the tbabs family of models, amd ismabs.