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Table 2.

Stars around QSO 2237+0305.

Star RA(J2000) Dec(J2000) g V r R I
α 340.10997 3.35061 17.795 17.500 17.209 17.280 17.260
β 340.11231 3.37664 18.684 18.276 17.805 17.855 17.692
γ 340.12079 3.33275 16.074 15.813 15.583 15.661 15.690

Notes. Field stars named α and β are shown in Fig. 1 of Corrigan et al. (1991), and the γ star is the so-called star 1 in Moreau et al. (2005). RA(J2000) and Dec(J2000) are given in degrees. The gr magnitudes are taken from the Sloan Digital Sky Survey DR15 (Aguado et al. 2019), while the VRI magnitudes correspond to results in Corrigan et al. (1991) and Vakulik et al. (1997).

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