Syntax:
-BLSFixPer <"aov" | "ls" | "spec" | "fix" period> <"r" rmin rmax | "q" qmin qmax > nbins timezone omodel [model_outdir] correctlc ["fittrap"] Example 1.$ ./vartools -i EXAMPLES/3.transit -ascii -oneline \ -rms \ -BLSFixPer fix 2.12345 q 0.01 0.1 200 0 0 1 fittrap \ -rms Name = EXAMPLES/3.transit Mean_Mag_0 = 10.16727 RMS_0 = 0.00542 Expected_RMS_0 = 0.00104 Npoints_0 = 3417 BLSFixPer_Period_1 = 2.12345000 BLSFixPer_Tc_1 = 53727.29676321477 BLSFixPer_SR_1 = 0.00238 BLSFixPer_Depth_1 = 0.01189 BLSFixPer_Qtran_1 = 0.03626 BLSFixPer_Qingress_1 = 0.20623 BLSFixPer_OOTmag_1 = 10.16687 BLSFixPer_i1_1 = 0.98158 BLSFixPer_i2_1 = 1.01785 BLSFixPer_deltaChi2_1 = -24228.56603 BLSFixPer_fraconenight_1 = 0.43366 BLSFixPer_Npointsintransit_1 = 166 BLSFixPer_Ntransits_1 = 4 BLSFixPer_Npointsbeforetransit_1 = 129 BLSFixPer_Npointsaftertransit_1 = 144 BLSFixPer_Rednoise_1 = 0.00151 BLSFixPer_Whitenoise_1 = 0.00489 BLSFixPer_SignaltoPinknoise_1 = 14.08946 BLSFixPer_deltaChi2_invtransit_1 = -2934.30109 BLSFixPer_MeanMag_1 = 10.16740 Mean_Mag_2 = 10.16678 RMS_2 = 0.00489 Expected_RMS_2 = 0.00104 Npoints_2 = 3417
Fit a Box-shape transit to the light curve EXAMPLES/3.transit at the period of 2.12345 days. Allow for fractional transit durations between 0.01 and 0.1, and use 200 phase-bins. Set the time-zone to 0 (this only affects the BLSFixPer_fraconenight statistic. Do not output the model, but subtract the best-fit model from the light curve before passing it on to the next command (in this example, that is the final -rms command). The fittrap option causes the procedure to fit a trapezoid-shaped transit. The calls to -rms before and after -BLSFixPer show how subtracting the BLS model reduces the scatter of the light curve.