NGC 1514: regression detection of a magnetic field on the second night, using uncontaminated stellar lines only. Methods R1 and RM yield a mean longitudinal magnetic field of ⟨B_z⟩ = −252 ± 85 G (top) and ⟨B_z⟩ = −252 ± 77 G (bottom), respectively. In the bottom panel, and the following figures of this kind, the histogram plot has a bin size of 5 G, and the (red) curve represents a Gaussian with the same mean value and standard deviation as the histogram data.