Table 2.
Best-fitting TBABS*JeTCAF model parameters for all observations of 3C 273.
| OBS date. | MJD | MBH | ṁd | ṁh | Xs | R | fcol | χr2 | Fjet | Fcorona |
|---|---|---|---|---|---|---|---|---|---|---|
| ( × 108 M⊙) | (ṁEdd) | (ṁEdd) | (rS) | |||||||
| 2012-07-13 | 56121 | 7.6 ± 1.2 | 0.010 ± 0.002 | 0.62 ± 0.05 | 21.1 ± 2.9 | 1.69 ± 0.16 | 0.12 ± 0.03 | 1.0 | 2.24 ± 0.07 | 0.32 ± 0.01 |
| 2012-07-14 | 56122 | 7.8 ± 1.0 | 0.015 ± 0.001 | 0.71 ± 0.04 | 20.2 ± 2.4 | 2.18 ± 0.19 | 0.18 ± 0.01 | 1.0 | 2.33 ± 0.12 | 0.20 ± 0.01 |
| 2015-07-13 | 57216 | 7.3 ± 0.9 | 0.016 ± 0.002 | 0.68 ± 0.04 | 23.8 ± 2.6 | 1.89 ± 0.21 | 0.25 ± 0.04 | 1.2 | 1.67 ± 0.11 | 0.15 ± 0.01 |
| 2016-06-26 | 57565 | 7.3 ± 1.0 | 0.020 ± 0.003 | 0.86 ± 0.06 | 21.7 ± 2.9 | 3.75 ± 0.33 | 0.07 ± 0.02 | 1.3 | 3.80 ± 0.11 | 0.73 ± 0.02 |
| 2017-06-26 | 57930 | 8.1 ± 1.1 | 0.022 ± 0.003 | 0.36 ± 0.01 | 8.5 ± 1.0 | 2.17 ± 0.17 | 0.006 ± 0.001 | 1.1 | 1.74 ± 0.05 | 0.69 ± 0.02 |
| 2018-05-19 | 58257 | 8.0 ± 1.6 | 0.014 ± 0.001 | 0.77 ± 0.04 | 25.1 ± 2.6 | 2.65 ± 0.15 | 0.17 ± 0.02 | 1.1 | 1.68 ± 0.04 | 0.46 ± 0.01 |
| 2018-06-02 | 58271 | 8.1 ± 1.5 | 0.016 ± 0.003 | 0.79 ± 0.04 | 28.6 ± 2.4 | 2.64 ± 0.22 | 0.17 ± 0.02 | 1.1 | 1.45 ± 0.03 | 0.94 ± 0.02 |
| 2018-06-15 | 58284 | 8.0 ± 1.4 | 0.018 ± 0.002 | 0.78 ± 0.03 | 24.6 ± 2.7 | 2.56 ± 0.21 | 0.15 ± 0.01 | 1.0 | 1.30 ± 0.03 | 0.41 ± 0.01 |
| 2018-07-04 | 58303 | 7.8 ± 1.1 | 0.016 ± 0.001 | 0.76 ± 0.02 | 14.0 ± 1.3 | 2.86 ± 0.23 | 0.13 ± 0.02 | 1.0 | 1.50 ± 0.06 | 0.24 ± 0.01 |
| 2019-07-02 | 58666 | 8.1 ± 1.2 | 0.020 ± 0.002 | 0.79 ± 0.03 | 19.4 ± 2.1 | 3.24 ± 0.24 | 0.06 ± 0.01 | 1.1 | 1.24 ± 0.04 | 0.35 ± 0.01 |
| 2020-07-06 | 59036 | 7.2 ± 1.0 | 0.020 ± 0.002 | 0.80 ± 0.04 | 20.9 ± 2.0 | 3.36 ± 0.28 | 0.06 ± 0.01 | 1.1 | 1.62 ± 0.04 | 0.40 ± 0.01 |
| 2021-04-14 | 59318 | 8.1 ± 1.4 | 0.013 ± 0.001 | 0.71 ± 0.02 | 19.6 ± 2.1 | 1.90 ± 0.11 | 0.35 ± 0.05 | 1.1 | 0.17 ± 0.00 | 1.39 ± 0.01 |
| 2021-06-09 | 59374 | 8.1 ± 1.3 | 0.018 ± 0.001 | 0.80 ± 0.02 | 20.0 ± 2.3 | 3.17 ± 0.22 | 0.04 ± 0.01 | 1.1 | 1.06 ± 0.03 | 0.44 ± 0.01 |
| 2022-06-28 | 59758 | 8.1 ± 1.4 | 0.020 ± 0.003 | 0.81 ± 0.02 | 19.8 ± 2.5 | 3.10 ± 0.29 | 0.10 ± 0.02 | 1.1 | 1.24 ± 0.03 | 0.38 ± 0.01 |
| 2023-04-12 | 60046 | 7.9 ± 0.9 | 0.017 ± 0.003 | 0.76 ± 0.03 | 23.9 ± 2.6 | 4.69 ± 0.53 | 0.03 ± 0.01 | 1.1 | – | 1.45 ± 0.01 |
| 2024-01-07 | 60316 | 8.1 ± 1.1 | 0.020 ± 0.001 | 0.82 ± 0.01 | 19.8 ± 2.4 | 3.30 ± 0.20 | 0.08 ± 0.02 | 1.0 | 1.15 ± 0.03 | 0.49 ± 0.01 |
Notes. Epochs with simultaneous XMM-Newton observations showed excesses below ∼1.5 keV, which required one Gaussian component between energies 0.2–0.5 keV of width 0.1–0.4 keV and another component at ≲0.1 keV of width ∼0.4 keV. The fluxes for the jet (Fjet) and the corona (Fcorona) are in units of 10−10 erg cm−2 s−1. Here ‘–’ in Fjet denotes the lowest normalization epoch, where the total flux is taken to be the coronal flux.
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