Table 2.
UV/optical magnitudes from Swift/UVOT and XMM-Newton/OM.
| Instrument | Epoch | AB magnitude |
|||||
|---|---|---|---|---|---|---|---|
| V | B | U | UVW1 | UVM2 | UVW2 | ||
| Swift/UVOT (merged) | – | 19.84 ± 0.09 | 19.66 ± 0.05 | 19.75 ± 0.03 | 19.93 ± 0.04 | 20.06 ± 0.05 | 20.16 ± 0.05 |
| Swift/UVOT (averaged) | – | 19.82 ± 0.11 | 19.56 ± 0.09 | 19.77 ± 0.07 | 19.79 ± 0.07 | 19.85 ± 0.06 | 19.92 ± 0.05 |
| XMM-Newton/OM | 2000-12-26 | – | 20.2 ± 0.1 | – | – | – | – |
| 2001-01-01 | – | 20.1 ± 0.1 | 20.3 ± 0.1 | 19.5 ± 0.1 | – | – | |
| 2005-05-22 | – | – | 20.0 ± 0.1 | 19.9 ± 0.1 | 20.2 ± 0.1 | – | |
| 2005-11-25 | – | – | 20.0 ± 0.1 | 19.62 ± 0.05 | 20.1 ± 0.1 | – | |
| 2016-12-17 | – | – | – | – | 20.3 ± 0.1 | – | |
| 2016-12-19 | – | – | – | – | 20.1 ± 0.1 | – | |
Notes. Swift/UVOT AB magnitudes from the merged observations and averaged over the single observations. XMM-Newton/OM magnitudes are from the XMM-Newton/OM catalogue (Page et al. 2012). U and UVW1 magnitudes from the 2016 XMM-Newton/OM observations have not been reported as they are affected by the ‘smoke ring’ feature. Quantities are reported with 1σ errors.
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