Table 1.
Surveys used in the extended spectroscopic compilation (Espec).
| Survey | Median | Median | Count | Selection | References |
|---|---|---|---|---|---|
| redshift | r-mag | criteria | |||
| GAMA-eq | 0.220 | 19.16 | 145 908 | NQ ≥ 3, z > 0.002 | Baldry et al. (2010) |
| 2dFGRS | 0.117 | 17.85 | 48 294 | q_z ≥ 3, z > 0.002 | Colless et al. (2001) |
| GAMA-noneq | 0.207 | 18.96 | 41 612 | NQ ≥ 3, z > 0.002 | Liske et al. (2015) |
| SDSS DR14 | 0.152 | 17.54 | 30 029 | zWarning = 0, 0 < zErr < 0.001, | |
| zErr/z < 0.01, z > 0.001 | Abolfathi et al. (2018) | ||||
| 2dFLenS | 0.229 | 18.64 | 19 710 | qual < 6, z > 0.001 | Blake et al. (2016) |
| DESI EDR | 0.261 | 19.82 | 12 767 | ZCAT_PRIMARY, zWarn = 0, z > 0.002 | DESI Collaboration (2024) |
| DEVILS | 0.217 | 19.39 | 888 | zBestType = spec, starFlag = 0, | |
| mask = 0, artefactFlag = 0 | Davies et al. (2018) | ||||
| COSMOS | 0.221 | 19.49 | 675 | 3 ≤ Q_f ≤ 5, or 13 ≤ Q_f ≤ 15, or | |
| 23 ≤ Q_f ≤ 25, or Q_f ∈ {6, 10}, z > 0.002 | priv. comm. (M. Salvato) | ||||
| OzDES | 0.200 | 18.72 | 516 | qop ∈ {3, 4}, z > 0.002 | Lidman et al. (2020) |
| WIGGLEZ | 0.388 | 19.87 | 362 | Q ≥ 3, z > 0.001, Dz/z < 0.1 | Drinkwater et al. (2010) |
| VVDS | 0.228 | 19.55 | 212 | ZFLAGS ∈ {3, 4, 23, 24} | Le Fèvre et al. (2005, 2013) |
| HCOSMOS | 0.222 | 19.50 | 178 | None | Damjanov et al. (2018) |
| ACES | 0.181 | 19.29 | 173 | Z_QUALITY ≥ 3, zErr/z < 0.01 | Cooper et al. (2012) |
| G15-DEEP | 0.250 | 19.91 | 106 | Z_QUAL ≥ 3, z > 0.001 | Driver et al. (2022) |
Notes. The table is arranged based on the descending number of sources within the KiDS DR4 + KiDZ bright sample coverage area. All the numbers apply after cross-matching the input spec-z samples with the photometric data limited at r < 20 mag and removing duplicates between surveys. We list only those surveys that have at least 100 cross-matched objects each.
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