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- W3099685919 abstract "The X-ray source AXJ0341.4-4453 was described by Boyle et al. as a Type 2 active galactic nucleus (AGN) at z=0.672 based on the absence of broad emission lines in the observed wavelength range 4000–7000 Å. We obtained a new spectrum of AXJ0341.4-4453 extending to 9600 Å which reveals broad Balmer lines and other characteristics of Seyfert 1 galaxies. The FWHM of broad Hβ is at least 1600 km s−1, while [O iii] λ5007 has FWHM=730 km s−1. The flux ratio [O iii] λ5007/Hβ=1. Thus, AXJ0341.4-4453 is by definition a narrow-line Seyfert 1 galaxy, or perhaps a moderately reddened Seyfert 1 galaxy, but it is not a Type 2 QSO. Although examples of the latter have long been sought, particularly in connection with the problem of the X-ray background, there is still virtually no evidence for the existence of any Type 2 QSO among X-ray selected samples." @default.
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- W3099685919 date "1999-08-01" @default.
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- W3099685919 title "Are there any Type 2 QSOs? The case of AXJ0341.4-4453" @default.
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- W3099685919 doi "https://doi.org/10.1046/j.1365-8711.1999.02874.x" @default.
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