D. W. Xu

An AGN Sample with High X-ray-to-optical Flux Ratio from RASS II.Optical Emission Line Properties of Seyfert 1 Type AGN (2003)

Xu, D. W., Komossa, Stefanie, Wei, J. Y., Qian, Y., Zheng, X. Z.

This work studies the optical emission line properties of a sample of 155 low-redshift bright X-ray selected ROSAT Seyfert~1 type AGN for which adequate signal-to-noise ratio spectroscopic...

An active galactic nucleus sample with high X-ray-to-optical flux ratio from RASS. II. Optical emission line properties of Seyfert 1-type active galactic nuclei (2003)

Xu, D. W., Komossa, Stefanie, Wei, J. Y., Zheng, X. Z.

Emission line properties of Seyfert 1 type AGN from RASS (2003)

Xu, D. W., Komossa, S., Wei, J. Y., Zheng, X. Z., Qian, Y.

1RXS J232953.9+062814: a New SU UMa Dwarf Nova below the Period Minimum (2001)

Wei, J. Y., Jiang, X. J., Xu, D. W., Zhou, A. Y., Hu, J. Y.

1RXS J232953.9+062814 was identified as a cataclysmic variable by Wei et al. (1999). Four low-resolution spectra of 1RXS J232953.9+062814 were obtained by using the 2.16-m telescope of the National...