Table 4.
Fit results for the MSH 15–52 observations for different analysis methods.
Analysis method | TS | Nsrc | RA (deg) | Dec (deg) | σmaj | σmin | PA (deg) | k0 | Γ |
---|---|---|---|---|---|---|---|---|---|
H.E.S.S. published (a) | n.c. | 3481 | 228.529 ± 0.006 | −59.159 ± 0.003 | 6.4′±0.7′ | 2.3′±0.5′ | 139 ± 13 | 5.7 ± 0.2 | 2.27 ± 0.03 |
Unbinned | 762.1 | 1134 | 228.548 ± 0.012 | −59.174 ± 0.007 | 6.3′±0.5′ | 3.7′±0.4′ | 147 ± 6 | 6.1 ± 0.3 | 2.30 ± 0.06 |
Joint binned | 781.1 | 1139 | 228.552 ± 0.012 | −59.174 ± 0.007 | 6.4′±0.5′ | 4.0′±0.4′ | 149 ± 7 | 6.4 ± 0.4 | 2.28 ± 0.06 |
Stacked binned | 767.6 | 1124 | 228.548 ± 0.012 | −59.172 ± 0.007 | 6.6′±0.5′ | 3.8′±0.4′ | 148 ± 6 | 6.4 ± 0.4 | 2.26 ± 0.06 |
Joint On-Off (wstat) | 440.9 | 870 | 228.548 | −59.174 | 6.3′ | 3.7′ | 147 | 6.5 ± 0.4 | 2.35 ± 0.07 |
Joint On-Off (cstat) | 527.5 | 877 | 228.548 | −59.174 | 6.3′ | 3.7′ | 147 | 6.5 ± 0.4 | 2.30 ± 0.06 |
Stacked On-Off (wstat) | 530.1 | 882 | 228.548 | −59.174 | 6.3′ | 3.7′ | 147 | 6.5 ± 0.4 | 2.30 ± 0.06 |
Stacked On-Off (cstat) | 548.4 | 890 | 228.548 | −59.174 | 6.3′ | 3.7′ | 147 | 6.6 ± 0.4 | 2.30 ± 0.06 |
Notes. TS is the Test Statistic, Nsrc is the number of source events attributed to the source within the analysis region, which is the full field of view for the 3D analyses and the On region for the On-Off analyses, RA is the Right Ascension and Dec the Declination of the fitted source model (J2000), σmaj and σmin are the major and minor axes of the elliptical shape and PA is the position angle, counted counterclockwise from celestial north. k0 and Γ are the parameters of the power law I(E) = k0(E/E0)−Γ which was used as the spectral component, where E0 = 1 TeV and k0 is in units of 10−12 ph cm−2 s−1 TeV−1.
Values are from Aharonian et al. (2005). “n.c.” signals that the information was not communicated in the publication.
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