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Table 1.
Log of spectral observations of the lensed quasar J1004+4112 with the 6 m telescope.
| Object | Device | Date | Texp | Sp. range | Sp. res. | Seeing |
|---|---|---|---|---|---|---|
| (s) | (Å) | (Å) | (arcsec) | |||
| J1004+4112 (ABD) | MPFS | 2007 May 16 | 7200 | 3800 ÷ 6100 | 8 | 1.5 |
| J1004+4112 (ABC) | MPFS | 2007 May 17 | 7200 | 3800 ÷ 6100 | 8 | 1.3 |
| J1004+4112 (AB) | SCORPIO | 2008 Oct. 27 | 4800 | 3650 ÷ 7540 | 10 | 1.1 |
| J1004+4112 (CD) | SCORPIO | 2008 Oct. 28 | 4800 | 3650 ÷ 7540 | 10 | 0.9 |
| J1004+4112 (AB) | SCORPIO-2 | 2018 Feb. 07 | 600 | 3650 ÷ 7250 | 5 | 1.7 |
| J1004+4112 (CD) | SCORPIO-2 | 2018 Feb. 07 | 900 | 3650 ÷ 7250 | 5 | 1.7 |
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