Open Access
Table 1.
Log of ground-based observations of GD 99.
| Run | UT date | Start time | Exp. | N | δT |
|---|---|---|---|---|---|
| (BJD-2 450 000) | (s) | (h) | |||
| Photometrics Inc. CCD | |||||
| 01 | 2002 Feb. 04 | 2310.274 | 40 | 519 | 9.46 |
| 02 | 2002 Feb. 05 | 2311.276 | 40 | 542 | 9.53 |
| Total | 1061 | 18.99 | |||
| FLI Proline CCD | |||||
| 03 | 2018 Oct. 12 | 8403.540 | 30 | 309 | 2.87 |
| 04 | 2018 Oct. 14 | 8405.548 | 30 | 284 | 2.64 |
| 05 | 2018 Oct. 15 | 8406.545 | 30 | 284 | 2.69 |
| Total | 877 | 8.20 | |||
| SI CCD | |||||
| 06(a) | 2021 Feb. 15 | 9261.248 | 30 | 426 | 6.27 |
| 07(b) | 2021 Mar. 15 | 9289.320 | 30 | 409 | 6.01 |
| 08(b) | 2021 Mar. 16 | 9290.308 | 30 | 450 | 6.80 |
| Total | 1285 | 19.08 | |||
| EMCCD | |||||
| 09 | 2021 Nov. 05 | 9523.505 | 30 | 170 | 1.61 |
| 10 | 2021 Nov. 05 | 9524.448 | 30 | 601 | 5.68 |
| 11 | 2021 Nov. 08 | 9527.478 | 30 | 500 | 4.73 |
| 12 | 2021 Nov. 09 | 9528.463 | 30 | 524 | 4.97 |
| Total | 1795 | 16.99 | |||
| SI CCD | |||||
| 13(c) | 2021 Dec. 07 | 9556.400 | 30 | 467 | 7.55 |
| 14(d) | 2022 Jan. 06 | 9586.308 | 30 | 664 | 9.97 |
| 15(d) | 2022 Jan. 07 | 9587.320 | 30 | 221 | 3.20 |
| 16(d) | 2022 Jan. 10 | 9589.527 | 30 | 329 | 4.91 |
| 17(d) | 2022 Jan. 10 | 9590.437 | 30 | 446 | 6.80 |
| 18(d) | 2022 Jan. 11 | 9591.311 | 30 | 658 | 9.71 |
| 19(d) | 2022 Jan. 12 | 9592.317 | 30 | 589 | 8.64 |
| 20(e) | 2022 Feb. 11 | 9622.430 | 30 | 402 | 6.15 |
| 21(e) | 2022 Feb. 12 | 9623.229 | 30 | 711 | 11.06 |
| 22(f) | 2022 Feb. 24 | 9635.239 | 30 | 262 | 4.95 |
| 23(f) | 2022 Feb. 27 | 9638.252 | 30 | 247 | 3.58 |
| 24(f) | 2022 Feb. 28 | 9639.247 | 30 | 452 | 7.21 |
| 25(f) | 2022 Mar. 01 | 9640.236 | 30 | 455 | 7.72 |
| 26(g) | 2022 Mar. 24 | 9663.267 | 30 | 261 | 3.81 |
| 27(g) | 2022 Mar. 25 | 9664.326 | 30 | 308 | 4.93 |
| 28(g) | 2022 Mar. 26 | 9665.303 | 30 | 448 | 6.76 |
| 29(g) | 2022 Mar. 27 | 9666.262 | 30 | 398 | 5.85 |
| 30(g) | 2022 Mar. 28 | 9667.261 | 30 | 395 | 6.54 |
| Total: | 7713 | 119.34 | |||
Notes. ‘Exp’ is the integration time, N is the number of data points, and δT is the length of the data sets including gaps. Weekly observations in the case of the SI camera are denoted by ‘a–g’ letters in parentheses. We also list the cameras used for the corresponding observations.
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