Figure 2b: 1 experiment transverse: 2 strong, 1 weak longitudinal: 2 strong, 4 weak Extended Data Figure 7: a: 5 experiments 7 outer cap, 11 transverse, 32 longitudinal - all consistent c: 1 experiment transverse: 4 moderate signal longitudinal: 5 moderate signal d: 1 experiment transverse: 2 no signal, rest moderate-to-strong longitudinal: 1 too high, 5 moderate-to-strong e: 1 experiment transverse: 4 weak, 11 none longitudinal: 2 weak f: 1 experiment transverse: 2 strong 1 weak longitudinal: 2 strong, 4 weak g: 3 experiments transverse: 2 weak, 1 very weak, 1 no signal longitudinal: 2 weak, 8 no signal h: 2 experiments transverse: 1 weak longitudinal: 4 weak, 5 no signal i: 1 experiment transverse: 4 moderate longitudinal: 1 moderate, 1 no signal j: 1 experiment outer cap: 2 weak transverse: 2 weak, 3 no signal longitudinal: 3 weak k: 1 experiment transverse: 4 weak longitudinal: 5 weak

l: 1 experiment outer cap: 1 weak longitudinal: 3 weak, 1 imaged too low m: 1 experiment transverse: 5 moderate longitudinal: 3 moderate, 1 no signal n: 3 experiments outer cap: 7 strong transverse: 3 strong, 1 no signal longitudinal: 25 strong Extended Data Figure 8 a: 4 experiments 2 outer, 5 transverse, 20 longitudinal - all consistent c: 2 experiments transverse: 3 strong, 2 moderate, 1 weak, 1 no signal longitudinal: 6 strong, 2 moderate, 4 weak, 11 none d: 3 experiments transverse: 7 strong, 2 no signal longitudinal: 7 strong, 1 moderate, 5 imaged too low, 1 none e: 1 experiment transverse: 3 weak longitudinal: 3 weak f: 1 experiment transverse: 3 no signal longitudinal: 5 weak g: 1 experiment outer: 1 moderate longitudinal: 4 moderate h: 1 experiment transverse: 1 very weak, 2 no signal longitudinal: 2 weak, 2 no signal i: 2 experiments transverse: 4 strong longitudinal: 8 strong, 7 imaged too low