This page is for the old Sherpa 4.15 release. Please see the Sherpa home page for the latest release.

Gallery of Sherpa examples

Plotting examples

• 1D PHA data:
  • Source spectrum:
    • Counts/sec/keV vs. Energy (keV)
    • Counts/sec/Angstrom vs. Wavelength (Angstrom)
  • Deconvolved source spectrum in Photons/sec/cm²/keV vs. Energy (keV)
  • Background spectrum in Counts/sec/keV vs. Energy (keV)
  • ACIS-S/HETG source grating spectra in Counts/sec/Angstrom vs. Wavelength (Angstrom)
  • HRC-S/LETG source grating spectra in Counts/sec/Angstrom vs. Wavelength (Angstrom)
  • ARF data: cm² vs. Energy (keV)

• 2D Image data:
  • DS9 source counts image
  • Radial profile in Counts/pixel vs. Radius (pixel)

Fitting examples

• 1D PHA data:
  • Power-law model fit to source counts spectrum, with residuals
  • Simultaneous power-law fit to ACIS-S/HETG source grating spectra
  • High-resolution power-law model components fit to HRC-S/LETG source grating spectrum

• 2D Image data:
  • 2D Gaussian model radial profile fit with residuals | 1D Beta model radial profile fit
  • DS9 counts images of data, PSF-convolved model, and fit residuals
  • Contour plot of residuals of PSF-convolved model fit

• Estimating fit parameter bounds (for data of any dimensionality):
  • Parameter bounds with interval-projection: Confidence plot of fit statistic vs. parameter value
  • Parameter bounds with region-projection: Confidence contour plot of fit statistic vs. two parameter values