Table 2
Synthetic data parameter space.
| Category | Parameter | Range of values | Parameter space | ||
|---|---|---|---|---|---|
| M87* | Sgr A* | M87* | Sgr A* | ||
| Standard | ϕmag | SANE–MAD | SANE–MAD | 2 | 2 |
| GRMHD | a* | ±0.94, ±0.5, 0 | ±0.94, ±0.5, 0 | 10 | 10 |
| -GRRT | Rhigh | 1,10, 20, 40, 80,160 | 1, 10, 40, 160 | 60 | 40 |
| models | ilos | 17° (163° if a* ≥ 0) | 10, 30, 50,…, 170° | 60 | 360 |
| θPA | 288° | 0, 30, 60,…, 180° | 60 | 2520 | |
| f0 | 0–1000 | 0–568 | 600000 | 252 000 | |
| Interstellar | Dsc | – | 2.7 ± 0.3 kpc | — | 252 000 |
| scattering | Rsc | – | 5.4 ± 0.3 kpc | — | 252 000 |
| screen | θsc,maj | – | 1.380 ± 0.013 mas | — | 252 000 |
| toward | θsc,min | – | 0.703 ± 0.013 mas | — | 252 000 |
| Sgr A* | ϕsc,PA | – | 81.9° ± 0.2° | — | 252 000 |
| αsc | – | 1.38 ± 0.06 | — | 252 000 | |
| rsc,in | – | 800 ± 200 km | — | 252 000 | |
| Data | 𝒫rms | 0.5′′&3x2013;1.5′′ | 600 000 | 252 000 | |
| corruption | 𝒲 | (0.8–4.0) ± (0.05–0.5) mm | 600 000 | 252 000 | |
| effects | 𝒯c | (5–10) ± (0.1–0.5) s | 600 000 | 252 000 | |
| Dϕ | ![\[ \propto {\cal T}_{\rm{c}}^{ - 5/3}\]](/articles/aa/full_html/2025/06/aa53784-25/aa53784-25-eq8.png) |
600 000 | 252 000 | ||
| 𝒟 | 1–3% | 600 000 | 252 000 | ||
| 𝒢err | 3–8% | 600 000 | 252 000 | ||
![\[{\rm{\sigma }}_{{\rm{th}}}^{\rm{2}}\]](/articles/aa/full_html/2025/06/aa53784-25/aa53784-25-eq9.png) |
∝ SEFD1 × SEFD2 | 600 000 | 252 000 | ||
| Total number of datasets: | 600 000 | 252 000 | |||
Notes. – Parameter space values that are drawn together (f0, interstellar scattering, and data corruption effects) are written in italics. Non-nuisance parameters of physical interest are marked in bold. The scattering parameters are taken from Table 3 in Johnson et al. (2018). The GRMHD-GRRT parameter space is different for the exotic models (see Section 3.8).
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