{{lastupdated_at}} by {{lastupdated_by}}

{{>toc}}

h1. COMPTEL Crab validation

This page summarizes analysis results obtained using GammaLib on the Crab.


h2. VP 1 validation

The interface has been validated using the COMPTEL data from Viewing Period 1. This observation was a 14 days pointing on the Crab. The analysis has been performed using GammaLib-00-07-00. The background has been modeled using a Phibar-fitted DRG file. This is only a crude background model, which may explain the discrepancy between nominal and fitted fluxes. The quoted sensitivities and the sensitivity derived by multiplying the statistical uncertainty by a factor of 3 are pretty close. Units are ph/cm2/s.

| *Energy* | *Nominal flux (1)* | *Fitted flux* | *Error* | *Quoted sensitivity (2)* | *Sensitivity (3*error)* |
| 0.7-1 MeV | 5.55e-4 | 8.55e-4 | 5.80e-5 | 2.01e-4 | 1.74e-4 |
| 1-3 MeV | 1.07e-3 | 1.283e-3 | 5.633e-5 | 1.68e-4 | 1.69e-4 |
| 3-10 MeV | 3.98e-4 | 2.42e-4 | 2.48e-5 | 7.3e-5 | 7.43e-4 |
| 10-30 MeV | 1.06e-4 | 5.03e-5 | 8.28e-6 | 2.8e-5 | 2.48e-5 |

References:
* (1) The Crab nebula and pulsar in the MeV range (attachment:Crab_analysis.pdf)
* (2) First COMPTEL source catalogue (attachment:COMPTEL_catalogue.pdf)