Open Access
Table B.1.
Non-closing systematic uncertainties, s (and in units of thermal noise, s/σth), for M87* and its calibrator 3C 279 estimated using various statistical tests on both CASA and HOPS products.
| Source | Test | CASA | HOPS | ||||
|---|---|---|---|---|---|---|---|
| s | s/σth | n | s | s/σth | n | ||
| M87* | RR − LL closure phases | 0.0° | 0.0 | 339 | 0.0° | 0.0 | 446 |
| band 1 − band 2 closure phases | 2.6° | 0.3 | 229 | 0.0° | 0.0 | 300 | |
| band 3 − band 4 closure phases | 1.5° | 0.2 | 192 | 0.0° | 0.0 | 251 | |
| trivial closure phases | 0.0° | 0.0 | 436 | 1.3° | 0.2 | 500 | |
| RR − LL log closure amplitudes | 13.2% | 0.7 | 158 | 4.0% | 0.2 | 294 | |
| band 1 − band 2 log closure amplitudes | 5.4% | 0.3 | 139 | 2.2% | 0.1 | 255 | |
| band 3 − band 4 log closure amplitudes | 0.0% | 0.0 | 116 | 0.0% | 0.0 | 171 | |
| trivial log closure amplitudes | 0.0% | 0.0 | 60 | 0.0% | 0.0 | 119 | |
| band 1 − band 2 closure trace phases | 1.2° | 0.2 | 43 | 0.0° | 0.0 | 103 | |
| band 3 − band 4 closure trace phases | 3.4° | 0.5 | 60 | 3.8° | 0.5 | 114 | |
| trivial closure trace phases | 0.0° | 0.0 | 118 | 3.5° | 0.5 | 152 | |
| band 1 − band 2 log closure trace amplitudes | 0.0% | 0.0 | 43 | 2.4% | 0.2 | 103 | |
| band 3 − band 4 log closure trace amplitudes | 0.0% | 0.0 | 60 | 5.3% | 0.4 | 114 | |
| trivial log closure trace amplitudes | 4.8% | 0.4 | 118 | 0.0% | 0.0 | 152 | |
| 3C 279 | RR − LL closure phases | 1.8° | 0.5 | 680 | 1.9° | 0.6 | 687 |
| band 1 − band 2 closure phases | 1.7° | 0.5 | 404 | 1.8° | 0.6 | 407 | |
| band 3 − band 4 closure phases | 1.9° | 0.5 | 416 | 1.8° | 0.5 | 420 | |
| trivial closure phases | 0.9° | 0.6 | 503 | 0.8° | 0.6 | 503 | |
| RR − LL log closure amplitudes | 5.4% | 0.7 | 833 | 5.4% | 0.7 | 846 | |
| band 1 − band 2 log closure amplitudes | 5.6% | 0.7 | 604 | 6.5% | 0.9 | 605 | |
| band 3 − band 4 log closure amplitudes | 5.1% | 0.7 | 619 | 6.4% | 0.8 | 638 | |
| trivial log closure amplitudes | 3.2% | 0.7 | 487 | 2.9% | 0.7 | 491 | |
| band 1 − band 2 closure trace phases | 3.0° | 0.9 | 378 | 3.8° | 1.2 | 393 | |
| band 3 − band 4 closure trace phases | 3.4° | 1.0 | 359 | 3.3° | 0.9 | 412 | |
| trivial closure trace phases | 0.5° | 0.3 | 316 | 0.5° | 0.3 | 320 | |
| band 1 − band 2 log closure trace amplitudes | 8.5% | 1.4 | 378 | 9.0% | 1.6 | 393 | |
| band 3 − band 4 log closure trace amplitudes | 7.0% | 1.1 | 359 | 6.3% | 1.0 | 412 | |
| trivial log closure trace amplitudes | 2.7% | 1.0 | 316 | 2.4% | 0.8 | 320 | |
Note. Only data from Apr 21 and Apr 25 have been used. n is the number of closure quantities used for each test.
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