Table 2.
Apparent extension of the Crab Nebula.
| ν [Hz] | θ68[″] | |
|---|---|---|
| 5 × 109 | 117 ± 1 | VLA (1) |
| 150 × 109 | 115 ± 2 | NIKA (2) |
| 1.8 × 1012 | 112 ± 5 | PACS 160 μm (3) |
| 4.3 × 1012 | 112 ± 5 | PACS 60 μm (3) |
| 1.4 × 1013 | 137 ± 5 | WISE 22 μm (4) |
| 2.5 × 1013 | 119 ± 5 | WISE 12 μm (4) |
| 6.5 × 1013 | 140 ± 5 | WISE 4.6 μm (4) |
| 8.9 × 1013 | 141 ± 5 | WISE 3.3 μm (4) |
| 1.03 × 1015 | 99 ± 5 | UVOT UVW1 (5) |
| 2.66 × 1017 | 46 ± 4 | Chandra (0.5 − 1.5) keV (6) |
| 3.7 × 1017 | 43 ± 3 | Chandra (1.5 − 3.0) keV (6) |
| 8 × 1017 | 39 ± 3 | Chandra (3 − 6) keV (6) |
| 1.2 × 1018 | 37 ± 3 | NuSTAR (5 − 6) keV (7) |
| 2.4 × 1018 | 33 ± 3 | NuSTAR (8 − 12) keV (7) |
| 1.2 × 1019 | 27 ± 3 | NuSTAR (35 − 80) keV (7) |
| Eγ [GeV] | θ68[″] | |
| 7 | 121 ± 47 | Fermi-LAT (8) |
| 14 | 209 ± 22 | (8) |
| 28 | 125 ± 26 | (8) |
| 56 | 114 ± 14 | (8) |
| 112 | 95 ± 29 | (8) |
| 214 | 83 ± 26 | (8) |
| 990 | 121 ± 38 | (8) |
| 1050 | 79 ± 10 | H.E.S.S. (9) |
Notes. The apparent angular size of the nebula was calculated by integrating the observed intensity over the solid angle up to θ68 which is the percentile that encloses 68% of the total flux. Whenever needed, point sources were excluded and background subtracted.
References. (1) Bietenholz et al. (2004), (2) Fig. 5 of Ritacco et al. (2018), (3) Herschel Science Archive (HSA), (4) Infrared Science Archive (IRSA), (5) XMM-Newton Science Archive (XSA), (6) Chandra Data archive, (7) Madsen et al. (2015), (8) Yeung & Horns (2019), (9) H. E. S. S. Collaboration (2020).
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