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Table 2

Combined transit depth, associated uncertainties and limb-darkening coefficients.

Wavelength (μm) Bandwidth (μm) Transit depth (ppm) Error (ppm) Limb-darkening coefficients
a1 a2 a3 a4
1.1262 0.0308 3128.22 129.30 2.0139 –1.6261 0.8709 –2.0398
1.1563 0.0293 2981.61 132.61 2.1956 –2.0725 1.2403 –0.3147
1.1849 0.0279 3224.87 121.09 2.1292 –1.9036 1.0964 –0.2708
1.2123 0.0269 3275.06 112.69 1.9514 –1.5303 0.8020 –0.1849
1.2390 0.0265 3476.20 95.97 1.9236 –1.5957 0.8838 –0.2137
1.2657 0.0269 3264.82 95.65 2.0255 –1.8405 1.0765 –0.2698
1.2925 0.0267 3589.24 115.10 2.1105 –2.1495 1.3561 –0.3578
1.3190 0.0263 3686.39 110.98 2.1650 –2.2486 1.4262 -0.3772
1.3454 0.0265 3368.20 126.87 1.2204 –0.1088 –0.1857 0.0789
1.3723 0.0274 2900.07 108.34 1.0023 0.4493 –0.6644 0.2195
1.4000 0.0280 3271.69 109.38 0.9553 0.4582 –0.6187 0.1988
1.4283 0.0285 3321.59 103.01 0.7774 0.7086 –0.7252 0.2128
1.4572 0.0294 3111.09 113.41 0.9247 0.4694 –0.6071 0.1921
1.4873 0.0308 3070.67 113.98 1.0279 0.2998 –0.530181 0.18063
1.5186 0.0318 3037.95 112.45 1.2541 –0.1103 –0.2727 0.1188
1.5514 0.0337 3125.30 102.78 1.5025 –0.6408 0.1247 0.0082
1.5862 0.0360 3472.00 114.20 1.7942 –1.3368 0.6809 –0.1553
1.6237 0.0390 3045.52 95.82 1.9296 –1.7566 1.0358 –0.2629

1.3750 0.5500 3268.70 51.38 2.009 –1.7704 1.0225 –0.2546

Notes. The final transmission spectrum was computed in ppm using the three HST/WFC3 G141 transit observations from July 2017, September 2019, and July 2020 on TRAPPIST-1 h.

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