HEASARC Staff Scientist Position - Applications are now being accepted for a Staff Scientist with significant experience and interest in the technical aspects of astrophysics research, to work in the High Energy Astrophysics Science Archive Research Center (HEASARC) at NASA Goddard Space Flight Center (GSFC) in Greenbelt, MD. Refer to the AAS Job register for full details.
ascac: ASCA surface brightness model
Mixing model for ASCA data. Written for cluster data so uses beta or two
power-law surface brightness models. Includes a calculation of the telescope
effective area so no arf should be applied to input files. Note that this
model is very slow if any of the parameters are free.
The model is used by reading spectra in as separate datagroups. Each input
file requires an XFLTnnnn keyword set to “region: N” where N is a different
number for each file (eg if concentric annuli are in use then number outwards).
The normalizations for each datagroup should be linked since the ascac
model takes care of the relative normalizations based on the surface
brightness model used. A maximum of five different spatial regions is allowed.
The absolute normalization is not reliable so this model should not be used
to derive fluxes.
| par1 |
Alpha |
| par2 |
Beta |
| par3 |
Core (arcmin) |
| par4 |
0  beta model,
1 2-power-law |
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Last modified: Friday, 23-Aug-2024 13:20:40 EDT
HEASARC Staff Scientist Position - Applications are now being accepted for a Staff Scientist with significant experience and interest in the technical aspects of astrophysics research, to work in the High Energy Astrophysics Science Archive Research Center (HEASARC) at NASA Goddard Space Flight Center (GSFC) in Greenbelt, MD. Refer to the AAS Job register for full details.
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