Fig2.csv comma separated csv column 1: space coordinate column 2: w, localized perturbation in modulation column n: difference pump rate ~ interaction strength Fig. 3: raw data for squares bmp files intensity profiles for transmitted beams projected on sigma_+ and sigma_- polarizations raw data for hexagons comma separated ASCII data intensity profiles for transmitted beams projected on sigma_+ and sigma_- polarizations Fig4.csv: comma separated csv column 1: input intensity for B=0 column 2: input intensity for B=0 column 3: input intensity for B neq 0 column 4: input intensity for B=0 Fig. 5: Fig5ab_Bx.csv: comma separated csv Fig. 5a column 1: magnetic field Bx columns 2-7: Diffracted power with y error for three different input intensities Fig. 5b columns 8-19: scaled B field with x error, normalized diffracted power with y error for three different input intensities Fig5ab_By.csv: comma separated csv Fig. 5a column 1: magnetic field By columns 2-7: Diffracted power with y error for three different input intensities Fig. 5b columns 8-19: scaled B field with x error, normalized diffracted power with y error for three different input intensities Fig5c.csv: comma separated csv column 1: Transverse By field column 2: threshold intensity column 3: Transverse By field column 4: Theoretical prediction for thereshold intensity from linear stability analysis for B=0 column 5: Transverse By field column 6: Theoretical prediction for thereshold intensity from linear stability analysis for Bx=35 mG