Table 1.
Stellar targets used for the radiometric calibration.
| Star ID | Spectral type | U | V | R | Observation date | dMetis | Coeff. RT ± σRT | ϵVL, * ± σ* |
|---|---|---|---|---|---|---|---|---|
| α Leonis | B8IVn | 0.88 | 1.40 | 1.37 | 15 June 2020 | 0.51 au | 1.14 ± 0.05 | 0.0126 ± 0.0007 |
| ρ Leonis | B1Iab | 2.78 | 3.87 | 3.90 | 17 June 2020 | 0.52 au | 1.13 ± 0.04 | 0.0140 ± 0.0010 |
| ν Scorpii | B2V | 3.42 | 4.00 | 3.90 | 15 March 2021 | 0.64 au | 1.16 ± 0.05 | 0.0141 ± 0.0006 |
| β 01 Scorpii | B1V | 1.68 | 2.62 | 2.60 | 15 March 2021 | 0.64 au | 1.16 ± 0.05 | 0.0141 ± 0.0006 |
| ω Scorpii | B1V | 3.10 | 3.97 | 3.91 | 15 March 2021 | 0.64 au | 1.16 ± 0.05 | 0.0128 ± 0.0014 |
| λ Librae | B3V | 4.43 | 5.03 | 5.00 (a) | 15 March 2021 | 0.64 au | 1.15 ± 0.05 | 0.0137 ± 0.0011 |
| θ Ophiuchi | OB | 2.18 | 3.26 | 3.38 | 25 March 2021 | 0.71 au | 1.15 ± 0.04 | 0.0136 ± 0.0008 |
Notes. The Johnson-Cousins U, V, R apparent magnitudes of the target stars are listed in the third, fourth and fifth column. Starting date of the target observations is in the sixth column. Distances of Metis dMetis to the Sun in astronomical unit (au), at the time of the observations, are in the seventh column. Values of the coefficient RT and its σRT (error propagation) in the eighth column (see Sect. 2.3). Values of the radiometric calibration factor for every star and its σ* (standard deviation) are in the last column. Reported information is taken from the SIMBAD catalog, with the exceptions of the last four columns.
Value derived taking into account the spectral type of the star and the B and V apparent magnitudes. This magnitude is consistent with the value provided by the Gaia catalog for the red band pass (Gaia Collaboration 2016, 2023).
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.