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Table C.1

HST line fluxes of GJ 3470.

Ion λmodel 2017-11-28 qsc 2017-12-04 qsc 2018-01-07 qsc 2018-01-23 qsc 2018-03-08 qsc
(Å) Fobs S∕N Ratio Fobs S∕N Ratio Fobs S∕N Ratio Fobs S∕N Ratio Fobs S∕N Ratio
Si III 1206.5019 5.49e-16 4.9 −0.45 4.32e-16 4.5 −0.56 4.13e-16 4.3 −0.58 3.11e-16 22.9 −0.71 3.08e-16 22.8 −0.72
O V 1218.344 … … … … … … … … … 1e-16 9.1 −0.01 1.11e-16 8.7 −0.01
N V 1238.8218 4.87e-16 7.4 0.02 5.16e-16 7.3 −0.03 3.69e-16 6.6 −0.08 4.48e-16 39.3 0.01 5.11e-16 33.8 0.00
N V 1242.8042 2.26e-16 4.8 −0.01 2.89e-16 5.9 0.03 2.76e-16 5.8 0.10 2.33e-16 25.5 0.03 2.57e-16 17.6 0.01
C II 1334.535 … … … … … … … … … 5.43e-16 17.6 −0.31 5.02e-16 17.9 −0.35
C II 1335.71 … … … … … … … … … 6.95e-16 41.6 0.14 6.72e-16 35.2 0.13
Si IV 1393.7552 … … … … … … … … … 2.53e-16 20.7 0.15 2.75e-16 20.2 0.18
Si IV 1402.7704 … … … … … … … … … 1.36e-16 11.4 0.18 1.36e-16 10.4 0.17
C III 1176.0 … … … … … … … … … 2.02e-15 10.7 0.42 5.19e-16 23.5 −0.17
2018-03-08 flare 1 2018-03-08 flare 2 2018-12-23 qsc 2018-12-23 flare peak 2018-12-23 flare decay
Si III 1206.5019 2.3e-15 17.3 −0.27 1.15e-15 11.2 −0.50 4.76e-16 28.9 −0.61 5.26e-15 23.9 −0.32 1.1e-15 9.1 −0.56
N V 1238.8218 7.2e-16 8.1 0.01 5.08e-16 6.5 −0.07 5.56e-16 54.0 −0.02 1.23e-15 17.4 0.03 7.62e-16 12.9 0.04
N V 1242.8042 3.21e-16 4.7 −0.04 3.35e-16 5.0 0.05 3.2e-16 31.4 0.04 5.11e-16 10.3 −0.05 3.29e-16 7.2 −0.03
C II 1334.535 1.62e-15 7.3 −0.19 6.02e-16 3.6 −0.34 6.93e-16 25.8 −0.24 2.94e-15 13.5 −0.24 1.59e-15 9.1 −0.19
C II 1335.71 1.72e-15 89.8 0.18 8.53e-16 7.2 0.17 9.2e-16 50.0 0.23 3.64e-15 22.2 0.21 1.84e-15 14.7 0.22
Si IV 1393.7552 8.01e-16 8.2 0.17 1.06e-15 10.3 0.19 3.55e-16 31.2 0.23 3.01e-15 28.2 0.25 1.18e-15 15.2 0.35
Si IV 1402.7704 5.15e-16 6.0 0.28 6.41e-16 6.7 0.28 1.73e-16 15.8 0.22 1.81e-15 20.4 0.33 4.27e-16 6.9 0.21
C III 1176.0 1.91e-15 10.9 −0.07 1.8e-15 10.5 −0.12 9.54e-16 36.1 −0.00 6.42e-15 22.1 0.00 2.02e-15 10.7 −0.02

Notes. Line fluxes (in erg cm−2 s−1) measured inHST/STIS and COS GJ 3470 spectra, and corrected for the ISM absorption when relevant. log Tmax (K) indicates the maximum temperature of formation of the line (unweighted by the EMD). “Ratio” is the log(Fobs/Fpred) of the line.

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