Matched filter results for the band seven CH₃OH lines in the HD 163296 disk using the H₂CO emission as atemplate. A peak >3σ at the sourcevelocity (v = 5.8 km s⁻¹; red dashed line) would signify a positive detection of methanol. The band seven lines should be the strongest in our sample, but there is no evidence of CH₃ OH in the matched filter for the band seven individual lines nor the band seven stacked lines. Left panel: CH₃ OH 1₁₀ –1₀₁ (A) line. Middle panel: CH₃OH 2₁₁ –2₀₂ (A) line. Right panel: stacked band seven CH₃OH lines.