Table 4.
Summary statistics of radio and optical samples in the ELAIS-N1 field.
| Sample | Ng | Area [deg2] | ng [arcmin−2] | zmed | zmean | ⟨erms2⟩1/2 | ⟨σe2⟩1/2 | ⟨erms2 + σe2⟩1/2 |
|---|---|---|---|---|---|---|---|---|
| HSC | 456 593 | 6.4 | 19.71 | 0.81 | 0.97 | 0.402 | 0.130 | 0.423 |
| LoTSS DR2 full | 154 952 | 24.5 | 1.76 | – | – | – | – | – |
| ILT sub-arcsecond | 7211 | 6.7 | 0.30 | – | – | 0.365 | 0.236 | 0.435 |
| HSC × LoTSS DR2 full | 21 845 | 6.4 | 0.95 | 0.84 | 0.86 | 0.408 | 0.075 | 0.415 |
| HSC × ILT sub-arcsecond | 2595 | 5.2 | 0.14 | 0.91 | 0.92 | 0.399 | 0.083 | 0.407 |
| ↳ Radio shape | – | – | – | – | – | 0.362 | 0.227 | 0.427 |
Notes. Ng and ng are the total number of sources and mean number density. All median and mean values are unweighted. The values in bold indicate the optical shape measurements from the HSC. ⟨erms2⟩1/2 and ⟨σe2⟩1/2 represent the intrinsic shape dispersion and measurement uncertainty, respectively. ⟨erms2 + σe2⟩1/2 denotes the total ellipticity dispersion. For ILT data, the total ellipticity dispersion ⟨erms2 + σe2⟩1/2 is measured directly, the measurement uncertainty ⟨σe2⟩1/2 is estimated through Eq. (8), and the intrinsic shape dispersion ⟨erms2⟩1/2 is derived from these quantities. Details on the LoTSS DR2, ILT sub-arcsecond, and HSC samples are provided in Sects. 3.1, 3.2, and 3.3.
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