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Table 1

Parameters of the models and the accuracy of the delay recovery for variability amplitude 0.1, assumed delay 660 days.

Model A B C D E
Parameter

Photometric  accuracy 5% 1% 5% 5% 5%
Spectroscopic  accuracy 10% 1% 10% 10% 10%
Width of the BLR response 10% 10% 10% 10% 10%
No. of photometric points/year 18 18 18 100 18
No. of spectroscopic points/year 5 5 5 5 18
Dispersion of the photometry date 3 days 3 days 3 days 1 day 3 days
Dispersion of the spectroscopy date 14 days 14 days 14 days 14 days 3 days
Observational gap/year 3 months 3 months 3 months 3 months 3 months
Campaign duration 5 years 5 years 20 years 5 years 5 years

ICCF
Obtained delay 605 ± 285 605 ± 251 660 ± 94 605 ± 279 605 ± 246
Spread 220 192 55 220 165

χ 2
Obtained delay 671 ± 113 652 ± 20 673 ± 31 671 ± 111 671 ± 76
Spread 84 9 40 93 47

ZDCF
Obtained delay 622 ± 200 666 ± 38 661 ± 405 604 ± 200 641 ± 206
Spread 141 20 62 137 119

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