Table 1.
GJ 436 observations collected in 2016 with Narval.
| Date | UT | HJD | ncyc | texp | S/N | σLSD | Bl |
|---|---|---|---|---|---|---|---|
| [hh:mm:ss] | [−2457464.4967] | [s] | [10−4Ic] | [G] | |||
| Mar. 16 | 23:49:19 | 0.00 | 0.00 | 4×700 | 201 | 5.7 | −12.3±7.0 |
| Mar. 18 | 00:36:58 | 1.03 | 0.03 | 4×700 | 202 | 5.6 | −8.0±6.8 |
| Mar. 20 | 23:25:14 | 3.98 | 0.10 | 4×700 | 271 | 4.0 | −4.0±5.0 |
| Apr. 18 | 21:33:54 | 32.91 | 0.82 | 4×700 | 231 | 4.6 | −0.9±6.0 |
| May 2 | 23:10:51 | 46.97 | 1.17 | 4×700 | 265 | 4.0 | −14.8±5.0 |
| May 3 | 23:32:45 | 47.99 | 1.20 | 4×700 | 220 | 5.7 | −11.5±6.6 |
| May 4 | 21:30:12 | 48.90 | 1.22 | 4×700 | 229 | 4.8 | −14.8±6.0 |
| May 11 | 20:34:43 | 55.86 | 1.39 | 4×700 | 190 | 6.5 | −12.3±7.4 |
| May 16 | 20:45:50 | 60.87 | 1.52 | 4×700 | 270 | 3.9 | −23.1±5.0 |
| May 17 | 20:46:53 | 61.87 | 1.54 | 4×700 | 188 | 5.8 | −19.6±7.4 |
| May 20 | 21:13:31 | 64.89 | 1.62 | 4×700 | 210 | 5.9 | −21.9±6.7 |
| May 23 | 20:54:26 | 67.88 | 1.69 | 4×700 | 228 | 5.1 | −17.4±6.1 |
| Jun. 2 | 20:58:28 | 77.88 | 1.94 | 4×700 | 214 | 5.2 | −9.1±6.5 |
| Jun. 4 | 21:10:44 | 79.89 | 1.99 | 4×700 | 204 | 5.6 | −2.7±6.8 |
| Jun. 7 | 20:59:19 | 82.88 | 2.07 | 4×700 | 265 | 3.9 | −11.3±5.1 |
| Jun. 8 | 21:04:34 | 83.88 | 2.09 | 4×700 | 278 | 3.8 | −6.5±4.7 |
Notes. The columns are: (1) and (2) date and universal time of the observations, (3) heliocentric Julian date normalised to the first collected observation, (4) rotational cycle of the observations found using Eq. (1), (5) exposure time of a polarimetric sequence, (6) signal-to-noise ratio at 1650 nm per polarimetric sequence, (7) rms noise level of the Stokes V signal in units of an unpolarised continuum, and (8) longitudinal magnetic field with a formal error bar.
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