Detection of strong Fe-K lines from the spiral galaxies NGC 1365 and NGC 1386

Two spiral galaxies, NGC 1365 and NGC 1386, were observed in X-rays with ASCA. Both galaxies exhibit hard X-ray emission from point-like sources at the nuclei. The continuous spectrum of NGC 1365 was fitted well with a power-law of photon index 0.8(-0.2)(+0.7), whose 2-10 keV luminosity is (3.8+/-0.5) x 10(40) erg s(-1) for an assumed distance of 18.4 Mpc. NGC 1386 has an absorbed [N-H=(2.8(-2.6)(+2.7)) x 10(23) cm(-2)] power-law continuum, whose 2-10 keV luminosity (at 18.4 Mpc) is (2.6(-2.0)(+3.2)) x 10(40) erg s(-1) after removing the absorption. A broad (sigma=0.20(-0.08)(+0.16) keV) Fe-K emission line centered at 6.61(-0.06)(+0.08) keV was detected from the NGC 1365 nucleus at an equivalent width of 2.1(-0.3)(+2.1) keV. The Fe-K line was also detected from NGC 1386 at an equivalent width of 1.6(-1.2)(+7.9) keV and at a similar energy as the NGC 1365 line. These spectral features indicate that both galaxies host low-luminosity active galactic nuclei (LLAGNs).