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We explore the relationships between the 3.3 {\mu}m polycyclic aromatichydrocarbon (PAH) feature and active galactic nucleus (AGN) properties of asample of 54 hard X-ray selected bright AGNs, including both Seyfert 1 andSeyfert 2 type objects, using the InfraRed Camera (IRC) on board the infraredastronomical satellite AKARI. The sample is selected from the 9-month Swift/BATsurvey in the 14-195 keV band and all of them have measured X-ray spectra at $E\lesssim 10$ keV. These X-ray spectra provide measurements of the neutralhydrogen column density ($N_{\rm H}$) towards the AGNs. We use the 3.3 {\mu}mPAH luminosity ($L_{\rm 3.3{\mu}m}$) as a proxy for star formation activity andhard X-ray luminosity ($L_{\rm 14-195keV}$) as an indicator of the AGNactivity. We search for possible difference of star-formation activity betweentype 1 (un-absorbed) and type 2 (absorbed) AGNs. We have made severalstatistical analyses taking the upper-limits of the PAH lines into accountutilizing survival analysis methods. The results of our $\log(L_{\rm14-195keV})$ versus $\log(L_{\rm 3.3{\mu}m})$ regression shows a positivecorrelation and the slope for the type 1/unobscured AGNs is steeper than thatof type 2/obscured AGNs at a $3\sigma$ level. Also our analysis show that thecircum-nuclear star-formation is more enhanced in type 2/absorbed AGNs thantype 1/un-absorbed AGNs for low X-ray luminosity/low Eddington ratio AGNs,while there is no significant dependence of star-formation activities on theAGN type in the high X-ray luminosities/Eddington ratios.

AKARI Infrared Camera Observations of the 3.3 {\mu}m PAH feature in Swift/BAT AGNs