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Table 1
Numbers of images and exposure times for the V and I band observations of M 68.
| Date | NV | tV(s) | N I | tI(s) |
|
|
||||
| 20130308 | 1 | 120 | 1 | 60 |
| 20130311 | 7 | 120 | 9 | 60 |
| 20130314 | 15 | 120 | 16 | 60 |
| 20130316 | 17 | 120 | 16 | 60 |
| 20130317 | 14 | 120 | 16 | 60 |
| 20130318 | 16 | 120 | 11 | 60 |
| 20130319 | 12 | 120 | 7 | 60 |
| 20130320 | 8 | 120 | 8 | 60 |
| 20130321 | 15 | 120 | 16 | 60 |
| 20130323 | 5 | 120 | 6 | 60 |
| 20130329 | 20 | 40 | 20 | 40 |
| 20130331 | 9 | 120 | 10 | 60 |
| 20130401 | 4 | 120 | 2 | 60 |
| 20130402 | 30 | 40–120 | 28 | 40–60 |
| 20130403 | 7 | 120 | 5 | 60 |
| 20130404 | 19 | 40-120 | 19 | 40-60 |
| 20130427 | 9 | 40 | 9 | 40 |
| 20130428 | 10 | 40 | 10 | 40 |
| 20130429 | 10 | 40 | 10 | 40 |
| 20130520 | 8 | 120 | − | − |
|
|
||||
| Total | 236 | 219 | ||
Notes. When varying exposure times were used, a range is given.
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