Table 1: The log of the spectroscopic observations of HR 3831. The columns give the heliocentric Julian Date and rotation phase of observation. Information about telescope/spectrograph combination used to collect the observations, spectral resolution ( ) and wavelength range is also provided.

HJD		HJD
CAT/CES (North et al. 1998)
R=100 000, 6675-6732 Å		2 451 945.852	0.070
2 450 152.703	0.330	2 451 946.582	0.326
2 450 154.770	0.055	2 451 946.636	0.345
2 450 155.691	0.378	2 451 946.690	0.364
2 450 155.707	0.384	2 451 946.746	0.383
2 450 155.809	0.419	2 451 946.800	0.402
2 450 156.547	0.678	2 451 946.854	0.421
2 450 156.779	0.760	2 451 947.573	0.673
ESO 1.52-m/FEROS,		2 451 947.627	0.692
R=48 000, 3650-9271 Å		2 451 947.681	0.711
2 451 883.743	0.292	2 451 947.735	0.730
2 451 883.866	0.335	2 451 947.788	0.749
2 451 885.755	0.997	2 451 947.842	0.767
2 451 885.866	0.036	2 451 953.559	0.772
2 451 886.766	0.352	2 451 953.613	0.791
2 451 886.870	0.388	2 451 953.667	0.810
2 451 887.741	0.694	2 451 953.721	0.829
2 451 887.871	0.739	2 451 953.776	0.848
2 451 888.752	0.048	2 451 953.841	0.871
2 451 888.869	0.089	2 451 954.554	0.121
2 451 889.747	0.397	2 451 954.608	0.140
2 451 889.870	0.440	2 451 954.663	0.159
2 451 890.742	0.746	2 451 954.717	0.178
2 451 890.869	0.791	2 451 954.771	0.197
ESO 3.6-m/CES		2 451 954.835	0.220
R=123 500, 6116-6156 Å		2 451 955.547	0.469
2 451 945.579	0.974	2 451 955.603	0.489
2 451 945.634	0.993	2 451 955.659	0.508
2 451 945.689	0.012	2 451 955.713	0.527
2 451 945.743	0.032	2 451 955.767	0.546
2 451 945.798	0.051	2 451 955.832	0.569