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Table B.1.

Log of our SPIRou observations of IRAS 04125+2902 in semesters 2024B and 2025A.

BJD UT date c / ϕ o / ψ texp SNR σV B dT RV (ato) RV (CO) RV (LBL) Pa-β EW
(2460000+) (rotation) (orbit) (s) (H) (10−4Ic) (G) (K) (km s−1) (km s−1) (km s−1) (km s−1)
608.0143940 2024 Oct 24 0 / 0.001 202 / 0.172 2128.5 147 4.3 24.4±8.8 10.0±1.4 16.69±0.05 17.13±0.05 16.994±0.007 -4.3±0.2
609.0920572 2024 Oct 25 0 / 0.096 202 / 0.294 2407.1 119 6.1 61.4±12.6 14.8±1.7 16.70±0.06 17.06±0.08 17.105±0.008 -5.6±0.2
622.0988784 2024 Nov 07 1 / 0.242 203 / 0.767 2407.1 124 5.3 51.4±11.4 -41.3±1.6 16.86±0.05 17.09±0.07 17.239±0.007 -5.5±0.2
623.8468610 2024 Nov 09 1 / 0.396 203 / 0.964 2351.4 144 4.5 20.8±10.1 -49.2±1.3 16.45±0.05 16.93±0.06 17.019±0.006 -6.5±0.2
624.9390119 2024 Nov 10 1 / 0.492 204 / 0.088 2039.3 147 4.3 44.0±8.9 -22.5±1.3 16.41±0.05 16.95±0.05 16.960±0.006 -6.0±0.2
625.8439799 2024 Nov 11 1 / 0.572 204 / 0.191 2044.9 147 4.2 16.2±9.4 -4.5±1.3 16.30±0.06 16.86±0.06 16.970±0.006 -6.7±0.2
626.8787366 2024 Nov 12 1 / 0.663 204 / 0.308 2078.3 146 4.2 0.3±9.1 18.2±1.3 16.44±0.05 16.91±0.06 16.935±0.006 -6.8±0.2
628.1004148 2024 Nov 13 1 / 0.771 204 / 0.446 2395.9 145 4.6 10.8±9.3 23.3±1.3 16.71±0.05 17.03±0.06 16.973±0.006 -5.5±0.2
631.9550217 2024 Nov 17 2 / 0.111 204 / 0.882 2407.1 92 7.9 66.2±17.7 -1.5±2.0 16.79±0.07 17.06±0.08 16.986±0.009 -6.2±0.2
636.9760053 2024 Nov 22 2 / 0.553 205 / 0.451 2407.1 132 5.1 23.8±10.5 -5.4±1.4 16.55±0.05 16.88±0.06 16.884±0.006 -6.6±0.2
638.0567321 2024 Nov 23 2 / 0.648 205 / 0.573 2407.1 121 6.3 19.2±13.2 14.3±1.6 16.59±0.05 16.99±0.07 16.905±0.007 -6.8±0.2
638.9277689 2024 Nov 24 2 / 0.725 205 / 0.671 2301.2 144 4.5 37.9±9.2 18.9±1.3 16.73±0.05 16.94±0.05 16.929±0.006 -6.3±0.2
640.8493921 2024 Nov 26 2 / 0.894 205 / 0.889 2368.1 139 5.0 16.9±10.6 14.5±1.4 16.81±0.05 17.05±0.05 16.987±0.006 -5.9±0.2
648.9055747 2024 Dec 04 3 / 0.604 206 / 0.801 2100.6 137 4.6 29.2±9.4 5.9±1.3 16.61±0.05 16.94±0.06 16.902±0.006 -6.0±0.2
650.8658794 2024 Dec 06 3 / 0.777 207 / 0.023 2407.1 116 5.8 55.5±12.2 23.5±1.6 16.63±0.06 17.01±0.07 16.961±0.007 -6.0±0.2
652.0129438 2024 Dec 07 3 / 0.878 207 / 0.152 2407.1 135 4.8 27.1±10.2 15.8±1.3 16.78±0.05 17.06±0.05 16.979±0.006 -6.3±0.2
652.8490028 2024 Dec 08 3 / 0.951 207 / 0.247 2234.3 146 4.4 -4.1±8.9 11.0±1.3 16.78±0.05 17.06±0.05 16.979±0.006 -5.5±0.2
653.8467623 2024 Dec 09 4 / 0.039 207 / 0.360 2245.5 130 4.9 -0.8±10.6 3.7±1.4 16.83±0.06 17.05±0.06 16.985±0.007 -6.2±0.2
654.9702164 2024 Dec 10 4 / 0.138 207 / 0.487 2407.1 124 5.4 58.7±11.3 -20.1±1.5 16.94±0.05 17.12±0.07 17.057±0.007 -5.7±0.2
656.9989921 2024 Dec 12 4 / 0.317 207 / 0.717 2407.1 125 5.2 16.7±11.5 -62.6±1.6 16.66±0.06 17.05±0.06 16.991±0.007 -6.8±0.2
657.8461617 2024 Dec 13 4 / 0.392 207 / 0.813 2245.5 138 4.6 38.1±9.9 -47.5±1.3 16.44±0.05 16.89±0.04 16.904±0.006 -6.9±0.2
659.8565597 2024 Dec 15 4 / 0.569 208 / 0.040 2295.6 130 5.2 50.0±11.0 -4.5±1.4 16.57±0.05 16.93±0.07 16.924±0.006 -6.2±0.2
660.9820562 2024 Dec 16 4 / 0.668 208 / 0.168 2373.6 128 5.2 29.6±10.7 10.8±1.4 16.61±0.05 16.94±0.05 16.947±0.007 -6.9±0.2
661.8967913 2024 Dec 17 4 / 0.749 208 / 0.271 2407.1 89 8.2 59.4±18.1 24.1±2.1 16.71±0.11 16.94±0.08 16.993±0.009 -7.0±0.2
662.9070342 2024 Dec 18 4 / 0.838 208 / 0.386 2401.5 141 4.6 39.8±9.3 28.9±1.3 16.73±0.05 16.97±0.06 16.987±0.006 -5.5±0.2
664.8320040 2024 Dec 20 5 / 0.007 208 / 0.603 2395.9 139 4.7 0.2±9.7 9.5±1.3 16.82±0.05 17.02±0.04 17.021±0.006 -6.3±0.2
665.8295021 2024 Dec 21 5 / 0.095 208 / 0.716 1978.0 134 4.7 26.4±9.7 -8.6±1.4 16.90±0.05 17.13±0.05 17.072±0.006 -6.3±0.2
666.7968469 2024 Dec 22 5 / 0.180 208 / 0.826 2111.8 141 4.4 58.7±9.2 -29.8±1.3 17.00±0.05 17.12±0.04 17.064±0.006 -6.2±0.2
667.9460719 2024 Dec 23 5 / 0.282 208 / 0.956 2384.8 138 4.6 30.9±9.8 -55.9±1.4 16.82±0.06 17.03±0.06 17.034±0.006 -5.9±0.2

712.7557814 2025 Feb 06 9 / 0.230 214 / 0.028 2407.1 144 4.4 33.8±9.2 -42.7±1.4 16.91±0.06 17.08±0.06 17.043±0.006 -6.0±0.2
713.7517826 2025 Feb 07 9 / 0.317 214 / 0.140 2407.1 140 4.5 30.9±10.1 -54.5±1.4 16.51±0.07 17.01±0.05 17.018±0.006 -5.7±0.2
714.7552796 2025 Feb 08 9 / 0.406 214 / 0.254 2407.1 147 4.3 46.0±9.2 -36.6±1.4 16.42±0.06 16.94±0.05 16.912±0.006 -5.3±0.2
716.7313956 2025 Feb 10 9 / 0.580 214 / 0.478 2407.1 150 4.2 55.1±8.8 -3.4±1.4 16.58±0.05 17.05±0.04 17.005±0.006 -6.1±0.2
717.7468824 2025 Feb 11 9 / 0.669 214 / 0.593 2407.1 143 4.4 82.3±9.7 5.4±1.4 16.52±0.08 17.01±0.06 16.940±0.006 -6.9±0.2
718.7253109 2025 Feb 12 9 / 0.756 214 / 0.703 2407.1 147 4.2 100.9±8.8 18.8±1.4 16.54±0.05 16.99±0.05 16.946±0.006 -6.7±0.2
719.7597841 2025 Feb 13 9 / 0.847 214 / 0.821 2407.1 140 4.5 62.9±9.9 23.4±1.4 16.61±0.08 17.02±0.05 16.971±0.006 -6.1±0.2
720.7188669 2025 Feb 14 9 / 0.931 214 / 0.929 2407.1 99 6.5 -17.6±15.2 15.7±2.4 16.87±0.08 17.07±0.08 17.034±0.010 -5.8±0.2
721.8351858 2025 Feb 15 10 / 0.030 215 / 0.055 2407.1 128 5.0 -47.0±10.2 -2.4±1.5 16.89±0.05 17.12±0.06 17.038±0.007 -5.5±0.2
724.7468078 2025 Feb 18 10 / 0.286 215 / 0.385 2407.1 145 4.2 14.7±9.2 -58.7±1.5 16.78±0.05 17.06±0.06 16.998±0.006 -5.3±0.2
725.8192773 2025 Feb 19 10 / 0.381 215 / 0.506 2407.1 135 4.7 53.9±10.4 -45.3±1.6 16.62±0.06 16.98±0.08 16.951±0.007 -5.7±0.2

Notes. For each visit, we list the barycentric Julian date BJD, the UT date, the rotation cycle c and phase ϕ (assuming Prot = 11.35 d, see Sect. 3, and counting from BJD 2460608, i.e., prior to our first SPIRou observation), the orbital cycle o and phase ψ (using the ephemeris of Barber et al. 2024b, i.e., Porb = 8.834976 d and BJD0 = 2458821.8257), the total observing time texp, the peak SNR in the spectrum (in the H band) per 2.3 km s−1 pixel, the noise level in the LSD Stokes V profile, the estimated B with error bars, the differential temperature dT with error bars, the nightly averaged RVs and corresponding error bars derived from Stokes I LSD profiles of atomic and CO lines, the RVs and corresponding error bars from the LBL analysis, and the measured Pa-β EWs (the negative sign indicating absorption).

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