Table 1.
Best-fit parameters of the transverse count distributions of the main and secondary nebula (see Sect. 3 for details).
| Nebula | ds | cd | maxima | σima | maxangle | σangle | D95 |
|---|---|---|---|---|---|---|---|
| – | arcmin | arcmin−1 | arcsec | arcsec | deg | deg | arcsec |
| Main | 0–0.5 | 180 ± 18 | –3.1 ± 1.6 | 4.7 ± 1.2 | 103.0 ± 3.0 | 32.4 ± 5.3 | 9.2 ± 2.4 |
| Main | 0.5–1 | 202 ± 18 | –1.2 ± 1.7 | 8.1 ± 2.5 | 16.1 ± 5.0 | ||
| Main | 1–2 | 86 ± 60 | 8.9 ± 1.1 | 5.7 ± 1.4 | 103.7 ± 4.4 | 36.8 ± 8.7 | 11.3 ± 2.8 |
| Main | 2–3 | 143 ± 49 | 12.3 ± 1.8 | 10.8 ± 2.4 | 66.0 ±7.5 | 36.8 ± 12.7 | 20.7 ± 4.8 |
| Main | 3–4 | 53 ± 46 | 90.4 ± 1.7 | 4.0 ± 1.9 | |||
| Main | 4–5 | 92 ± 46 | 13.5 ± 2.2 | 12.1 ± 3.0 | 79.4 ± 2.6 | 20.5 ± 3.9 | 24.1 ± 6.0 |
| Main | 5–6 | 121 ± 47 | 6.8 ± 3.4 | 15.8 ± 4.6 | 91.6 ± 1.8 | 27.4 ± 2.7 | 31.4± 9.2 |
| Main | 6–7 | 84 ± 46 | 9.1 ± 2.6 | 11.9 ± 3.6 | 91.9 ± 1.8 | 22.9 ± 2.6 | 23.6 ± 7.2 |
| Main | 7–8 | 124 ± 46 | –1.7 ± 1.2 | 6.3 ± 1.7 | 83.8 ± 1.9 | 32.3 ± 3.1 | 12.0± 3.4 |
| Secondary | 0–2 | 87 ±31 | –3.0 ± 6.1 | 24.4 ± 9.1 | 71.0 ± 0.6 | 10.0 ± 1.7 | 48.8 ± 18.2 |
| Secondary | 2–4 | 113 ± 31 | –6.9 ± 2.4 | 14.2 ± 3.4 | 28.2 ± 6.8 |
Notes. Each distribution is significantly different (>3σ) from the previous and following distributions. The value ds indicates the position of the box with respect to the pulsar, cd is the observed number of nebular counts per arcminute, maxima and σima are the parameters of the Gaussian fits to the count distribution while maxangle and σangle are the parameters of the Gaussian fits to the angle distribution. The value D95 is the PSF-corrected nebular thickness containing 95% of the background-subtracted counts. Column entries that straddle two rows indicate that they were obtained using two boxes together. We do not rely on angles’ fit for the 2′−3′ segment, due to the high contamination of the CCD gap.
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