Table 1.
Informations on the observations of M 15.
| Filter | λeff | Δλ | tsng | Total | Seeing | N | mlim | Spectral |
|---|---|---|---|---|---|---|---|---|
| name | [nm] | [nm] | [s] | [s] | [′′] | (stars) | (mag) | feature |
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) |
| u | 348.5 | 50.8 | 60 | 600 | 1.944 | 13 451 | 22.2 | |
| J0378 | 378.5 | 16.8 | 60 | 544 | 1.873 | 6289 | 20.2 | [OII] |
| J0395 | 395.0 | 10.0 | 60 | 604 | 1.643 | 7532 | 19.2 | Ca H+K |
| J0410 | 410.0 | 20.0 | 60 | 605 | 1.473 | 22 522 | 21.6 | Hδ |
| J0430 | 430.0 | 20.0 | 60 | 605 | 1.481 | 22 959 | 21.7 | G-band |
| g | 480.3 | 140.9 | 10 | 115 | 1.383 | 39 427 | 22.6 | |
| J0515 | 515.0 | 20.0 | 60 | 665 | 1.299 | 23 968 | 21.6 | Mgb |
| r | 625.4 | 138.8 | 10 | 105 | 1.179 | 53 357 | 22.4 | |
| J0660 | 660.0 | 13.8 | 60 | 605 | 1.214 | 22 402 | 20.6 | Hα |
| i | 766.8 | 153.5 | 10 | 105 | 1.117 | 57 518 | 21.8 | |
| J0861 | 861.0 | 40.0 | 60 | 675 | 1.211 | 40 723 | 21.0 | Ca-Trpl |
| z | 911.4 | 140.9 | 10 | 105 | 1.071 | 49 510 | 21.2 | |
Notes. Col. 2: central wavelength of the filter; Col. 3: effective pass band; Col. 4: exposure time of individual frames; Col. 5: total exposure time of the co-added image; Col. 6: average seeing of the short-exposure frames; Col. 7: number of stars with error ≤ 0.5 mag; Col. 8: limiting (faintest) magnitude reached with error ≤ 0.5 mag; Col. 9: key spectral feature sampled.
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