Table 1
Multiple systems observed in this paper.
| System | Comp. | nexp | nused | texp | Sep. | PA | Δm |
|---|---|---|---|---|---|---|---|
| ζ Ori | AaAb+B | 100 | 12 | 0.1 s | 2.′′42 | 167° | 2.3 |
| σ Ori | AaAb+B | 100 | 7 | 1.0 s | 0.′′26 | 70° | 1.2 |
| 15 Mon | AaAb+B | 110 | 17 | 1.0 s | 3.′′00 | 214° | 3.1 |
| δ Ori | Aa+Ab | 100 | 10/6 | 0.1 s | 0.′′30 | 131° | 1.3 |
| η Ori | AaAb+B | 100 | 29/22 | 1.0 s | 1.′′80 | 77° | 1.3 |
Notes. For each system we give the total number of exposures, the number of exposures used (with two values when the system was observed on two nights), and the single exposure time. The systems separation, position angle, and approximate magnitude difference were obtained from the Washington Double Star Catalog (Mason et al. 2001) and our own AstraLux data (Maíz Apellániz 2010)
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