SIMBAD references

We present the spectral energy distribution (SED) between 10 and 200µm obtained for the prototype narrow-line X-ray galaxy NGC 7582 with ISOPHOT, the photometer on board the Infrared Space Observatory. The emission is spatially extended and we separated for the first time the nuclear and extranuclear infrared SEDs. The nuclear luminosity (L_IR∼4.5x10¹⁰L_☉) is dominated by cold (T∼32K) dust emission mainly due to star formation activity; warm (T∼122K) dust emission is also present and is probably related to the active nucleus. In addition to a cold component of 30K, the extranuclear SED (L_IR∼1.7x10¹⁰L_☉) shows emission by colder (T∼17K) dust: this very cold component comprises 90% of the total dust mass of 9.8x10⁷M_☉.