Abstract:
A new narrow-line QSO, RX J1334.2+3759, has been identified at a redshift of 0.3858. The QSO has intrinsic soft X-ray luminosity ~ 2.8 x 1044 erg s-1. Soft X-ray emission from the QSO is highly variable. Rapid variability (change in intensity by a factor of ~ 4 within ~ 400 s) has also been found. The soft X-ray spectra of the QSO is well described by a power-law of photon index, ?x ~ 3.8. The optical spectrum of RX J1334.2+3759 is typical of narrow-line Seyfert 1 galaxies. The NLR of RX J1334.2+3759 appears to be significantly different from those of normal Seyfert 1 galaxies.