Open Access
Table 4.
Vega magnitudes of ULXs X-6 and X-7 optical counterparts in NGC 4631.
| Source | Filter | Vega magnitude |
|---|---|---|
| X6a | F606W HST/WFC3 | 25.50 ± 0.06 |
| X6a | F814W HST/WFC3 | 26.35 ± 0.08 |
| X6b | F606W HST/WFC3 | 26.45 ± 0.08 |
| X6b | F814W HST/WFC3 | 25.48 ± 0.08 |
| X6c | F606W HST/WFC3 | 25.86 ± 0.04 |
| X6c | F814W HST/WFC3 | 25.11 ± 0.10 |
| X7a | F606W HST/WFC3 | 24.53 ± 0.04 |
| X7a | F814W HST/WFC3 | 24.20 ± 0.06 |
| X7b | F606W HST/WFC3 | 24.31 ± 0.04 |
| X7b | F814W HST/WFC3 | 24.37 ± 0.06 |
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