# Area-median subtraction using background estimation: JetMedianBackgroundEstimator, using uninitialised JetDefinition (jet_algorithm=undefined_jet_algorithm) with Active area (hidden ghosts) with ghosts of area 0.00997331 (had requested 0.01), placed up to y = 6, scattered wrt to perfect grid by (rel) 1, mean_ghost_pt = 1e-100, rel pt_scatter = 0.1, n repetitions of ghost distributions = 1 and selecting jets with |rap| <= 3, background estimation for particle masses: JetMedianBackgroundEstimator, using uninitialised JetDefinition (jet_algorithm=undefined_jet_algorithm) with Active area (hidden ghosts) with ghosts of area 0.00997331 (had requested 0.01), placed up to y = 6, scattered wrt to perfect grid by (rel) 1, mean_ghost_pt = 1e-100, rel pt_scatter = 0.1, n repetitions of ghost distributions = 1 and selecting jets with |rap| <= 3, known vertex selection: !(Identity), leading vertex selection: Identity and safety checks for pt and mass.