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Table 1.
Log of photometric observations for the blazar OJ 287.
| Date of observations | Telescope | Number of data points | |||
|---|---|---|---|---|---|
| (yyyy mm dd) | B | V | R | I | |
| 2019 02 15 | C | 0 | 1 | 6 | 1 |
| 2019 02 27 | A | 3 | 2 | 30 | 2 |
| 2019 03 01 | A | 2 | 9 | 27 | 1 |
| 2019 03 02 | A | 0 | 9 | 22 | 1 |
| 2019 03 03 | A | 1 | 17 | 16 | 2 |
| 2019 03 09 | C | 1 | 1 | 1 | 1 |
| 2019 03 11 | C | 1 | 1 | 1 | 1 |
| 2019 03 12 | C | 0 | 1 | 1 | 0 |
| 2019 03 13 | C | 1 | 1 | 1 | 1 |
| 2019 03 26 | A | 2 | 1 | 24 | 2 |
| 2019 04 05 | C | 1 | 1 | 17 | 1 |
| 2019 04 06 | C | 1 | 1 | 10 | 1 |
| 2019 04 07 | C | 1 | 2 | 20 | 2 |
| 2019 04 09 | A | 1 | 16 | 16 | 1 |
| 2019 04 10 | A | 2 | 10 | 10 | 2 |
| 2019 04 10 | A | 3 | 4 | 12 | 2 |
| 2019 04 11 | A | 2 | 12 | 14 | 2 |
| 2019 12 17 | A | 0 | 1 | 9 | 2 |
| 2020 01 03 | A | 2 | 2 | 120 | 2 |
| 2020 01 27 | B | 0 | 4 | 4 | 1 |
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