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Table 1.
Summary of I-band photometric observations considered in this paper.
| Source | N | HJDstart | HJDend | mag | std. |
|---|---|---|---|---|---|
| OGLE-II | 915 | 50 455.6744 | 51 873.7744 | 14.898 | 0.218 |
| OGLE-III | 504 | 52 123.9345 | 54 953.5268 | 14.907 | 0.246 |
| OGLE-IV | 73 | 55 326.4931 | 57 710.7482 | 14.901 | 0.302 |
Notes. The number of measurements, starting and ending times for the series, average magnitude, and standard deviation (in magnitudes) are given. Single point uncertainties are between 4 and 6 mmag. The zero point for HJD is 2 400 000.
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