Table 1: Log of the observations. $\sigma _{{\rm star}}$ denotes the standard deviation of flux in images of the guide star during each integration. Column 6 lists the signal to noise ratio of a one-dimensional spectrum within a 1 $^{\prime \prime }$ radius of the QSO.
Date (UT) Exposure time (s) Airmass Seeing $\sigma _{{\rm star}}$(%) S/N
Sep. 5 2002 02:48 1800 1.19 1 $^{\prime \prime }$ 0.5 5.9
Sep. 5 2002 03:20 1800 1.19 1 $^{\prime \prime }$ 0.5 5.7
Sep. 8 2002 00:03 1800 1.57 1 $.\!\!^{\prime\prime}$3-1 $.\!\!^{\prime\prime}$5 10 3.9
Sep. 8 2002 00:36 1800 1.14 1 $.\!\!^{\prime\prime}$3-1 $.\!\!^{\prime\prime}$5 9 4.2


Source LaTeX | All tables | In the text