The Discovery of Eight Bright Active Galactic Nuclei Observed with the HEAO 1 Scanning Modulation Collimator

Eight active galactic nuclei (AGNs; seven type 1 Seyferts and one QSO) are reported. They are 14th and 15th mag objects with broad hydrogen lines and redshifts in the range 0.026 < z < 0.138. The AGNs were discovered in a systematic program to identify the fainter X-ray sources of the HEAO 1 survey. The X-ray and optical luminosities and many of the optical emission features of these AGNs resemble other bright and nearby Seyfert 1 galaxies. However, three of the galaxies exhibit very strong Fe II emission, and two additionally show very weak forbidden line spectra similar to I Zw 1. One of the I Zw 1 types, the previously unidentified radio source PKS 0558-504, is a QSO with unusually narrow hydrogen lines. Photometric magnitudes and the intensities of selected emission lines are given for each of the AGNs.