Table 3: Properties of the Ly$\alpha $ nebulae around the QSOs. Columns (1) list the names, (2) the redshifts derived from the narrow emission lines, (3) velocity offsets in the EELRs relative to the QSO redshifts, (4) peak surface brightness, (5) apparent extension of the Ly$\alpha $ nebula, (6) total Ly$\alpha $ flux from the nebula, (7) total luminosity in the nebulae, (8) emission line FWHM corrected for instrumental resolution, (9) relative velocity offsets between the narrow emission lines (one-dimensional spectra) and the QSO redshifts. Fluxes have been corrected for Galactic reddening. An analysis of the surface brightness has been attempted only for the two objects with very bright nebulae.

(1)
(2) (3) (4) (5) (6) (7) (8) (9)
Name z (Ly$\alpha $) V $\Sigma$ (Ly$\alpha $) size ftot $\log L_{{\rm tot}}$ FWHM $\Delta V$
    (km s-1) ( erg cm-2 s-1 arcsec-2) (kpc) (10-16  erg cm-2 s-1) (erg s-1) (km s-1) (km s-1)

Q0953+4749
4.489     13 $0.36\pm0.17$ 42.9 1000 1800 $\pm$ 200

Q1425+606
3.204 600-200 $2\times10^{-16}$ 34 $9.8\pm0.8$ 43.9 500 100 $\pm$ 100

Q1451+122
3.253     15 $1.8\pm0.5$ 43.2 500 -600 $\pm$ 100

Q1759+7539
3.049 200-300 $3\times10^{-16}$ 60 $9.9\pm1.6$ 43.9 450 $0\pm100$

Q2233+131
3.301     10 $1.1\pm0.4$ 43.0 <400 $700\pm100$


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