AKARI North Ecliptic Pole Deep Survey: Revision of the catalogue via a new image analysis

We present the revised near- to mid-infrared catalogue of the AKARI North Ecliptic Pole deep survey. The survey has the unique advantage of continuous filter coverage from 2 to 24 mu m over nine photometric bands, but the initial version of the survey catalogue leaves room for improvement in the image analysis stage; the original images are strongly contaminated by the behaviour of the detector and the optical system. The purpose of this study is to devise new image analysis methods and to improve the detection limit and reliability of the source extraction. The detection limits of all mid-infrared bands were improved by ~20%, and the total number of detected objects was increased by ~2000 compared with the previous version of the catalogue; it now has 9560 objects. The false-detection rate of all nine bands was decreased to less than 0.3%. In total, 27770 objects are listed in the catalogue, 11349 of which have mid-infra red fluxes.