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P. Palunas, J.P. Gardner, M.S. Sahu, H.I. Teplitz, E.M. Malumuth, B.E. Woodgate, S.R. Heap, G.M. Williger (NASA--GSFC)
We have used the Big Throughput Camera at CTIO to image around the Hubble Deep Field--South in a narrow--band filter centered on Ly-\alpha at the redshift of QSO J2233-606 (z=3D2.25). A total 4 hours of exposure reaches limits of 8.0\times10-17~ergs~cm-2~s-1 (5\sigma for point sources with 1.5\arcsec seeing). The images cover 40\arcmin\times40\arcmin\ and sample a cube 60 co-moving Mpc on a side at the redshift of the QSO (for H0 =3D 50 km/s/Mpc and q0 =3D = 0.5). Broad-band, uB, images were also obtained to measure the continuum. We discuss emission-line objects associated with the QSO. These objects may outline a large-scale structure at z=3D2.25.
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