============================================================================ Photometric conversion factors for Phase 3 data Aug. 24, 2009 Dear AKARI/IRC users, The following table summaries the preliminary conversion factors for phase 3 observations until March 2009 derived from observations of standard stars. Note that the ratio of the conversion factors between the long and short exposures is not the one expected from the exposure time. The reason is not known at present. The conversion factors are given in units of ADU/exposure to Jy (same as in the IDUM). CF (short exposure) CF (long exposure) short %error Nstar long %error Nstar N2 5.499e-06 1.845 16 6.600e-07 2.158 13 N3 3.885e-06 1.960 18 4.947e-07 2.367 11 N4 2.776e-06 2.125 16 3.615e-07 2.279 13 Sincerely yours, IRC team ============================================================================