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 | Bℓ | 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 Bℓ 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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