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Home All issues Volume 690 (October 2024) A&A, 690 (2024) A80 Full HTML
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Table A.1.

Spectral fit results for all epochs.

Epoch Spectrum Model kTdisk F 0.2 − 2.0 keV disk $ F^{\mathrm{disk}}_{\mathrm{0.2-2.0\,keV}} $ F 0.2 − 2.0 keV disk , comp $ F^{\mathrm{disk,comp}}_{\mathrm{0.2-2.0\,keV}} $ kTQPE F 0.2 − 2.0 keV QPE $ F^{\mathrm{QPE}}_{\mathrm{0.2-2.0\,keV}} $ F bol disk $ F^{\mathrm{disk}}_{\mathrm{bol}} $ F bol QPE $ F^{\mathrm{QPE}}_{\mathrm{bol}} $
[eV] [erg s−1 cm−2] [erg s−1 cm−2] [eV] [erg s−1 cm−2] [erg s−1 cm−2] [erg s−1 cm−2]
Aug. 2020 Quiescence D+C 63 ± 5 1 . 1 − 0.6 + 1.2 × 10 − 11 $ 1.1^{+1.2}_{-0.6} \times 10^{-11} $ 7 . 5 − 2.7 + 3.6 × 10 − 14 $ 7.5_{-2.7}^{+3.6} \times 10^{-14} $ – – 4 . 5 − 2.5 + 5.5 × 10 − 11 $ 4.5^{+5.5}_{-2.5} \times 10^{-11} $ –
QPE rise D+C+BB ∼63 ∼1.1 × 10−11 ∼7.5 × 10−14 176 ± 10 7 . 3 − 1.2 + 1.4 × 10 − 13 $ 7.3^{+1.4}_{-1.2} \times 10^{-13} $ – –
QPE peak D+C+BB ∼63 ∼1.1 × 10−11 ∼7.5 × 10−14 186 ± 6 (1.9 ± 0.2)×10−12 – (2.0 ± 0.2)×10−12
QPE decay D+C+BB ∼63 ∼1.1 × 10−11 ∼7.5 × 10−14 127 ± 8 1 . 0 − 0.2 + 0.4 × 10 − 12 $ 1.0^{+0.4}_{-0.2} \times 10^{-12} $ – –
Feb. 2022 Quiescence D+C 58 − 7 + 10 $ 58_{-7}^{+10} $ 1 . 1 − 0.8 + 2.8 × 10 − 11 $ 1.1^{+2.8}_{-0.8} \times 10^{-11} $ < 4.3 × 10−14 – – 5 . 5 − 4.5 + 19.9 × 10 − 11 $ 5.5^{+19.9}_{-4.5} \times 10^{-11} $ –
QPE rise D+C+BB ∼58 ∼1.1 × 10−11 ≲4.3 × 10−14 200 ± 20 8 . 2 − 1.6 + 2.9 × 10 − 13 $ 8.2^{+2.9}_{-1.6} \times 10^{-13} $ – –
QPE peak D+C+BB ∼58 ∼1.1 × 10−11 ≲4.3 × 10−14 196 ± 11 1 . 9 − 0.3 + 0.6 × 10 − 12 $ 1.9^{+0.6}_{-0.3} \times 10^{-12} $ – 2 . 0 − 0.3 + 0.6 × 10 − 12 $ 2.0^{+0.6}_{-0.3} \times 10^{-12} $
QPE decay D+C+BB ∼58 ∼1.1 × 10−11 ≲4.3 × 10−14 131 ± 11 1 . 6 − 0.4 + 0.8 × 10 − 12 $ 1.6^{+0.8}_{-0.4} \times 10^{-12} $ – –
Jun. 2022 Quiescence D+C 65 − 11 + 13 $ 65_{-11}^{+13} $ 3 . 7 − 2.9 + 22.5 × 10 − 12 $ 3.7^{+22.5}_{-2.9} \times 10^{-12} $ < 3.7 × 10−16 – – 1 . 8 − 1.5 + 12.2 × 10 − 11 $ 1.8^{+12.2}_{-1.5} \times 10^{-11} $ –
QPE rise D+C+BB ∼65 ∼3.7 × 10−12 ≲3.7 × 10−16 212 ± 13 6 . 6 − 0.8 + 1.5 × 10 − 13 $ 6.6^{+1.5}_{-0.8} \times 10^{-13} $ – –
QPE peak D+C+BB ∼65 ∼3.7 × 10−12 ≲3.7 × 10−16 200 ± 9 1 . 6 − 0.1 + 0.3 × 10 − 12 $ 1.6^{+0.3}_{-0.1} \times 10^{-12} $ – 1 . 7 − 0.2 + 0.3 × 10 − 12 $ 1.7^{+0.3}_{-0.2} \times 10^{-12} $
QPE decay D+C+BB ∼65 ∼3.7 × 10−12 ≲3.7 × 10−16 128 ± 9 1 . 5 − 0.4 + 0.7 × 10 − 12 $ 1.5^{+0.7}_{-0.4} \times 10^{-12} $ – –
Dec. 2023 Quiescence D+C 61 − 8 + 10 $ 61_{-8}^{+10} $ 1 . 0 − 0.8 + 3.6 × 10 − 11 $ 1.0^{+3.6}_{-0.8} \times 10^{-11} $ < 3.1 × 10−15 – – 6 . 1 − 5.1 + 26.6 × 10 − 11 $ 6.1^{+26.6}_{-5.1} \times 10^{-11} $ –
QPE rise D+C+BB ∼61 ∼1.0 × 10−11 ≲3.1 × 10−15 205 ± 16 5 . 0 − 0.9 + 1.4 × 10 − 13 $ 5.0^{+1.4}_{-0.9} \times 10^{-13} $ – –
QPE peak D+C+BB ∼61 ∼1.0 × 10−11 ≲3.1 × 10−15 202 ± 8 1 . 8 − 0.3 + 0.3 × 10 − 12 $ 1.8^{+0.3}_{-0.3} \times 10^{-12} $ – 1 . 8 − 0.3 + 0.5 × 10 − 12 $ 1.8^{+0.5}_{-0.3} \times 10^{-12} $
QPE decay D+C+BB ∼61 ∼1.0 × 10−11 ≲3.1 × 10−15 108 ± 8 1 . 7 − 0.5 + 0.8 × 10 − 12 $ 1.7^{+0.8}_{-0.5} \times 10^{-12} $ – –

Notes. Fit values show the median and related 16th-84th percentiles of the fit posteriors, using the disk (D), Comptonization (C) and blackbody QPE model (BB). Fluxes are reported in the rest-frame band and after correcting for Galactic and host absorption (see text for values). For the bolometric fluxes, the chosen energy range is 0.001 − 100 keV. For the ‘Aug. 2020’ epoch, the different phases are shown in Fig. 4 and in the top panel of Fig. 1. Here, the quiescence spectrum, including the additional host galaxy absorption, is held fixed during the QPE epochs by letting its parameters free to vary only within the 10th-90th percentiles of the posteriors of the quiescence fit alone (hence the "∼"). Given the spectroscopic redshift of 0.0175 (Arcodia et al. 2021) and the cosmology adopted (Hinshaw et al. 2013) the conversion for related luminosity values for eRO-QPE2 is 7.04 × 1053 cm2.

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