...
The data were analyzed for three four subselections, with counts cubes generated for emin, emax = 20, 5000 MeV (30 energy bands) for a 10x10 deg region centered on IC443:
- IC443 events only
- IC443 + Galactic + Isotropic (at full simulated statistics)
- IC443 decimated by a factor of 10 (=IC443/10) + Galactic + Isotropic such that Galactic:Isotropic:IC443 = 10:1:1
- IC443/10 + Galactic using only events with MCENERGY > 50 + Isotropic
This is intended to mimic simulations where the Galactic diffuse model was truncated below 50 MeV.
The selected energy range for fitting was emin, emax = 60, 2000 MeV using
| Code Block |
|---|
>>> like.setEnergyRange(60, 2000) |
These three four cases were analyzed both with energy dispersion handling turned off and turned on.
Results
dataset | edisp handling | Index1 | BreakValue | Index2 |
|---|---|---|---|---|
IC443 only | no | -0.70 +/- 0.03 | 248 +/- 5 | -1.88 +/- 0.01 |
IC443 only | yes | -0.43 +/- 0.07 | 249 +/- 10 | -1.89 +/- 0.01 |
IC443+Gal+Iso | no |