Table 1
Basic properties of η Car datasets.
| Dataset | Start date | End date | Phase range | Live time | Mean zenith | Telescopes considered |
|---|---|---|---|---|---|---|
| (h) | (°) | |||||
| DS-A | Jan. 13, 2013 | May 30, 2016 | −0.28-0.29 | 20.6 | 39.2 | CT1–4 (a) |
| DS-B | Jan. 29, 2017 | Apr. 7, 2019 | 0.45–0.84 | 63.3 | 39.2 | CT1–4 (b) |
| DS-C | Dec. 23, 2019 | May 24, 2020 | 0.97–1.05 | 97.8 | 39.9 | CT1–5 (c) |
| DS-D | Feb. 15, 2021 | Apr. 10, 2021 | 1.18–1.21 | 31.5 | 37.2 | CT1–4 (b) |
Notes. The phase is given with respect to the 2014 periastron passage (phase = 0) following the ephemeris from Teodoro et al. (2016). The live time is given for the stereo observation time and is corrected for dead time. (a)CT1–4 with the original cameras. (b)CT1–4 with upgraded cameras (H.E.S.S.1U, Giavitto et al. 2018). (c)H.E.S.S.1U and CT5 with FlashCam (Bi et al. 2022).
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