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2004ApJ...600L.123K - Astrophys. J., 600, L123-L126 (2004/January-2)
A possible new population of sources with extreme X-Ray/optical ratios.
KOEKEMOER A.M., ALEXANDER D.M., BAUER F.E., BERGERON J., BRANDT W.N., CHATZICHRISTOU E., CRISTIANI S., FALL S.M., GROGIN N.A., LIVIO M., MAINIERI V., MOUSTAKAS L.A., PADOVANI P., ROSATI P., SCHREIER E.J. and URRY C.M.
Abstract (from CDS):
Abstract Copyright: ∼
Journal keyword(s): Galaxies: Active - Galaxies: Evolution - Galaxies: High-Redshift - Surveys - X-Rays: Galaxies
Simbad objects: 11
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