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Table 1

Target prioritisation categories.

Priority Criteria Total targets/MSA footprint Targets allocated JWST-only targets Success(4) rate Interloper fraction
1 z(1)> 8.5, F160W < 29 (HST) OR F115W dropout or higher | robust zphot > 9 & & Detection band < 29.5 (JWST) AND identified as robust from visual inspection 6 6 2 83% 0%

2 As for Class 1 but lower visual inspection score 6 2 2 50% 0%

3 z > 8.5, F160W > 29 (HST) AND not rejected at visual inspection Some objects not identified as robust originally in Classes 1 and 2 are demoted to this class 9 3 2 >33%(a) <33%(a)

4 5.7 < z < 8.5, pass rest-UV cut (HST) OR 6 < z < 8.5, detection band < 27.5 (JWST) AND identified as robust from visual inspection 76 20 1 85% 5%(b)

5 2 < zphot < 5.7, F160W < 23 (HST) OR zphot > 2, any filter < 22.5 (JWST) 18 5 1

6.1 5.7 < z < 8.5, F160W < 29 (HST) 5.7 < z < 8.5, (F105W < 29|F150W < 29) (JWST) AND not rejected at visual inspection 100 9 3 89% 11%
6.2 5.7 < z < 8.5, F160W > 29 (HST) OR 5.7 < z < 6.5, F444W(2) < 27.5 (JWST) AND not rejected at visual inspection 102 7 1 57% 29%

7.1 4.5 ≤ z < 5.7, F160W < 29 (HST) OR 4.5 ≤ z < 5.7, F444W(2) < 27.5 (JWST) AND rare galaxy up-weighting(3) 4 1 0
7.2 3.5 ≤ z < 4.5, F160W < 29 (HST) OR 3.5 ≤ z < 4.5, F444W(2) < 27.5 (JWST) AND rare galaxy up-weighting(3) 5 1 0
7.3 2.5 ≤ z < 3.5, F160W < 29 (HST) OR 2.5 ≤ z < 3.5, F444W(2) < 27.5 (JWST) AND rare galaxy up-weighting(3) 12 0 0
7.4 1.5 ≤ z < 2.5, F160W < 29 (HST) OR 1.5 ≤ z < 2.5, F444W(2) < 27.5 (JWST) AND rare galaxy up-weighting(3) 18 1 0
7.5 4.5 ≤ z < 5.7, F160W < 29 (HST) OR 4.5 ≤ z < 5.7, F444W(2) < 27.5 (JWST) 246 23 2 83% 4%
7.6 3.5 ≤ z < 4.5, F160W < 29 (HST) OR 3.5 ≤ z < 4.5, F444W(2) < 27.5 (JWST) 570 31 1 71% 3%
7.7 2.5 ≤ z < 3.5, F160W < 29 (HST) OR 2.5 ≤ z < 3.5, F444W(2) < 27.5 (JWST) 1015 45 4 78% 4%
7.8 1.5 ≤ z < 2.5, F160W < 29 (HST) OR 1.5 ≤ z < 2.5, F444W(2) < 27.5 (JWST) 1565 47 4 64% 4%

8.1 F160W > 28.5, 1.5 ≤ z < 5.7 AND has Gaia2 coords (HST) OR 1.5 ≤ z < 5.7, 27.5 < F444W(2) < 29 (JWST) 2119 20 3
8.2 24.5 <F160W< 29, z < 1.5 AND has Gaia2 coords (HST) OR z < 1.5, F444W(2) < 29 (JWST) 836 17 1
8.3 F160W > 29, z < 1.5 AND has Gaia2 coords (HST) 361 3 0

9 fillers (not deliberately rejected) 1569 12 0

Notes. The HST and JWST entries for each class denote the different priority criteria whether the source was primarily selected from JWST or HST(see text for details). The number of targets per MSA footprint were estimated from the full 36×34$\[3^\prime_\cdot6 \times 3^\prime_\cdot4\]$ field of view. (1)In this table, z denotes a redshift estimate either from a photometric redshift, or from dropout criteria. (2)Denotes photometry derived from Kron apertures. (3)“Rare galaxy up-weighting” was applied to targets that were identified as candidates for being either quiescent, hosting an active galactic nucleus (AGN), or Lyman-continuum leakers. (4)The success rate is the fraction of galaxies targeted who had a spectroscopic redshift measured within Δz = 0.1 of the predicted redshift interval for that priority class. Galaxies lying outside this range are classed as interlopers. (a)The spectrum of object 9992 is Class 3 is ambiguous and may show two sources, a low-redshift galaxy at z = 1.962 and hints of a second galaxy at z > 9. (b)One target in Class 4 for which we did not get a good spectrum, 10035328, is a star (with a proper motion of 016$\[0^{\prime\prime}_\cdot16\]$ between HST/WFC3 and NIRCam) and we class it as an interloper.

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