Table 1.
Summary of the EHT 2017 observations at 230 GHz.
| Common | B1950 | J2000 | Redshift z | Type | Volume | Days (Apr. 2017) | Sites | BL (km) | Ref. |
|---|---|---|---|---|---|---|---|---|---|
| Sagittarius A* | 1742–286 | J1750–2900 | – | – | 23024 | 5, 6, 7, 10, 11 | all | 11204 | (1) |
| 3C 279 | 1253–055 | J1256–0547 | 0.538 | Q | 9638 | 5, 6, 10, 11 | all | 11297 | (2) |
| M 87 | 1228+126 | J1230+1223 | 0.0042 | R | 8846 | 5, 6, 10, 11 | all but Y | 10835 | (3) |
| OJ 287 | 0851+202 | J0854+2006 | 0.306 | B | 4548 | 5, 10, 11 | all but Y | 10834 | (4) |
| Centaurus A | 1322–427 | J1325-4303 | 0.0014 | R | 3218 | 10 | all but P | 10749 | (5) |
| J1924–2914 | 1921–293 | J1924–2914 | 0.353 | Q | 2937 | 5, 6, 7, 10, 11 | all | 11091 | (6) |
| NRAO 530 | 1730–130 | J1733–1304 | 0.902 | Q | 1439 | 5, 6, 7 | all | 11305 | (7) |
| 3C 273 | 1226+023 | J1229+0203 | 0.158 | Q | 642 | 6 | all but Y | 9372 | (8) |
| 1749+096 | 1749+096 | J1751+0939 | 0.322 | B | 612 | 10 | J, L, S, X, Z | 9342 | |
| 1055+018 | 1055+018 | J1058+0133 | 0.89 | Q | 488 | 5, 10, 11 | all but Y | 8904 | |
| BL Lacertae | 2200+420 | J2202+4216 | 0.069 | B | 174 | 7 | J, S, X, Z | 8934 | |
| 3C 84 | 0316+413 | J0319+4130 | 0.0177 | R | 141 | 7 | A, J, S, X, Z | 9344 | (9) |
| 3C 454.3 | 2251+158 | J2253+1608 | 0.859 | Q | 139 | 7 | J, S, X | 9382 | |
| CTA 102 | 2230+114 | J2232+1143 | 1.037 | Q | 118 | 7 | J, S, X | 9384 | |
| J0132–1654 | 0130–171 | J0132–1654 | 1.020 | Q | 65 | 6, 7 | A, J, P, Y | 11263 | |
| J0006–0623 | 0003–066 | J0006–0623 | 0.347 | B | 36 | 7 | A, J, P, Y | 11211 | |
| NGC 1052 | 0238–084 | J0241–0815 | 0.0049 | R | 20 | 6, 7 | A, J, S, Y | 5895 | (10) |
| Cygnus X–3 | 2030+407 | J2032+4057 | – | X | 16 | 5 | J, S | < 0.2 |
Notes. The names listed in column “Common” follow the convention used by the EHT, and sometimes coincide with the “B1950” or “J2000” designations. Object types: B: BL Lac object; Q: quasar; R: radio galaxy; X: X-ray binary. Sites: A = ALMA; J = JCMT; L = LMT; P = PV; S = SMA; X = APEX; Y = SPT; Z = SMT. Redshifts taken from SIMBAD (Wenger et al. 2000); Sgr A* and Cyg X–3 are galactic sources. Volume: Total number of detections; BL: Maximum projected baseline. (1) The Event Horizon Telescope Collaboration (2022a); (2) Kim et al. (2020); (3) The Event Horizon Telescope Collaboration (2019a; (4) Gómez et al. in prep.; (5) Janssen et al. (2021); (6) Issaoun et al. (2022); (7) Jorstad et al. (2023); (8) Wielgus et al. (in prep.); (9) Paraschos et al. (2024); (10) Baczko et al. (2024).
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