Tools for simulations - Athena
Tools for simulations
Athena effective area science requirements
The Athena effective area science requirements are:
|Requirement||Energy (keV)||Instrument||Area (cm2)|
The requirements are implemented through the following mirror configuration:
- Mirror Assembly (MA) with 15 rows, 6 sectors, 600 mirror modules
- Active mirror apertues radius 244-1256 mm
- Mirror plate rib spacing (pitch) of 2.3 mm
- 10 nm of Ir coating on each individual module, plus 10 nm SiC overcoating in rows 9 to 15 (the outermost)
- -1/+1 wedging geometry
The mirror geometry is described in the Athena Telescope Reference Document (TRD) version 3.1 by Tim Oosterbroek (ESA/ESTEC).
Component Data Files
Estimates of the on-axis effective area, vignetting curves, and Point Spread Function (PSF) have been provided by Prof. Richard Willingale (University of Leicester). The data files provided on this web page are preliminary. They have been based on realistic ray-trace experiments including all known loss effects. In addition, they do include provisional loss factors to account for expected losses such as misalignments, coating imperfections, contamination, etc. The simulations correspond to the simulated mission at beginning-of-life conditions.
Mirror Effective Area On Axis (X-ray tracing, 1 eV energy resolution)
- 15 rows, 2.3 mm rib pitch, Ir+SiC coating in the outermost MA rows (nominal baseline configuration): ASCII
For historical reasons, and for compliance with the original nominal requirements specified above, readers can download also an effective area data file corresponding to a Ir+B4C coating. This does not represent any longer the baseline coating solution.
- Image of the on-axis 1 keV PSF for the nominal HEW requirement (5"): FITS (pixel size=0.1")
- Image of the on-axis 1 keV PSF for a degraded HEW (6.5"): FITS (pixel size=0.1")
ON-AXIS De-focused PSF
Images (FITS) and radial profiles (ASCII) of the 35-mm de-focused PSF as a function of energy (pixel size=0.25") at :
OFF-AXIS AREAs and PSF
The PSF model is a 2-D distribution whose radial profile corresponds to a modified pseudo-Voigt distribution.