Table 1.
Main properties of the three sets of high-cadence TOAs.
| Dates | MJD range | Obs. Freqs. | Cadence | TOA error |
|---|---|---|---|---|
| (MHz). | (min) | (μs) | ||
| Oct. 1981–May 1986 | 44886–46563 | 635 | 2–15 | 7–15 |
| Jan. 1990–Sep. 1997 | 47894–50705 | 635; 950 | 2; 2 | 30; 22 |
| Apr. 1999–Oct. 2005 | 51294–53671 | 635; 990 | 2–4; 2 | 30; 25 |
Notes. The quoted cadences are the most common time lengths between TOAs, which generally correspond to 2-min integration observations. Observations were less dense on occasion, however. The quoted TOA errors are the average of all available values when they are (roughly) distributed normally. A range of values is given otherwise.
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