Table 2
Fit parameters for various fits to the nebula spectrum extracted from a symmetric region of 0.8° and 0.4° radius, respectively, with E0 = 1TeV and I0 in units of 10−12 cm−2 s−1 TeV−1.
| Analysis | Region | ϕ Fit model | I0 | Γ | Fit parameters | χ2∕ndf |
|---|---|---|---|---|---|---|
 |
6.81 ± 0.07 ± 0.2 | 2.28 ± 0.01 ± 0.02 | – | 141/14 | ||
| A | 0.4° |  |
7.20 ± 0.09 ± 0.2 | 2.13 ± 0.02 ± 0.03 | Ec = 19 ± 3 ± 0.8 TeV | 21/13 |
 |
7.4 ± 0.1 ± 0.1 | 2.26 ± 0.01 ± 0.02 | β = 0.078 ± 0.008 ± 0.01 | 21/13 | ||
 |
17.9 ± 0.2 ± 0.4 | 2.33 ± 0.01 ± 0.01 | – | 134/15 | ||
| A | 0.8° |  |
18.8 ± 0.2 ± 0.3 | 2.18 ± 0.02 ± 0.02 | Ec = 19 ± 3 ± 2 TeV | 34/14 |
 |
19.3 ± 0.3 ± 0.2 | 2.31 ± 0.01 ± 0.01 | β = 0.076 ± 0.009 ± 0.008 | 45/14 | ||
 |
15.0 ± 0.5 ± 2 | 2.23 ± 0.02 ± 0.04 | – | 39/16 | ||
| B | 0.8° |  |
16.1 ± 0.6 ± 2 | 2.06 ± 0.05 ± 0.08 | Ec = 15 ± 5 ± 6 TeV | 18/15 |
 |
16.5 ± 0.6 ± 2 | 2.21 ± 0.03 ± 0.04 | β = 0.08 ± 0.02 ± 0.03 | 21/15 | ||
 |
19.8 ± 0.4 | 2.38 ± 0.02 | – | 40.4/15 | ||
| H.E.S.S. 2006 | 0.8° |  |
21.0 ± 0.5 | 2.26 ± 0.03 | Ec = 24.8 ± 7.2 TeV | 16.9/14 |
 |
21.0 ± 0.4 | 2.29 ± 0.02 | β = −0.17 ± 0.04 | 14.5/14 | ||
Notes. In all cases, the first errors quoted are statistical and the second errors are systematic. Curved models are preferred for the results from analysis A, fitted in the energy ranges [0.133,91] TeV in the core region, [0.2, 91] TeV in the 0.8° radius, and for the shorter exposure analysis B in the energy range [0.14, 91] TeV. The fit results from Aharonian et al. (2006b) are also provided for comparison.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.