Table 2.
Photometry of α Cir from space and spectroscopy from ground.
| Season | Tobs | Number of | Start | End |
|---|---|---|---|---|
| [d] | data points | [yyyy-mm-dd] | ||
| Photometry: | ||||
| WIRE (λ ≃ 600 ± 190) | ||||
| 2000 | 42.1 | 26 359 | 2000-08-18 | 2000-09-29 |
| 2005 | 8.3 | 10 857 | 2005-02-16 | 2005-02-25 |
| 2006 († ) | 171.2 | 56 673 | 2006-02-10 | 2006-07-31 |
| 5cSMEI (λ ≃ 630 ± 300) | ||||
| 2003/10 | 2885 | 23 703 | 2003-02-03 | 2010-12-30 |
| 5cTESS (λ ≃ 800 ± 200) | ||||
| 2019 | 53.0 | 34 425 | 2019-04-22 | 2019-06-19 |
| 2021 | 51.9 | 37 706 | 2021-04-28 | 2021-06-24 |
| 2023 | 27.9 | 19 514 | 2023-05-04 | 2023-06-01 |
| 5cBRITE (λ ≃ 605 ± 70) | ||||
| 2014 | 145.3 | 64 037 | 2014-03-03 | 2014-08-08 |
| 2016 | 163.7 | 31 257 | 2016-02-04 | 2016-07-22 |
| 2021 | 136.4 | 46 367 | 2021-03-21 | 2021-08-23 |
| Spectroscopy: | ||||
| HARPS (echelle spectra: λ 378 − 691) | ||||
| 2008 (††) | 60.2 | 4869 | 2008-02-20 | 2008-04-20 |
Notes. Given are the approximate effective wavelengths and band widths of the different photometers in nm, the data time span, Tobs, the number of data points, and the start and end date of the observations. († )The WIRE 2006 data have a gap from March 15 to July 7 (114 days). (††)HARPS data have a gap from February 23 to April 16 (52 days).
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