Illustration of the simplified calibration process for J-PLUS images beyond DR1. The J0515 passband and the DR1 pointing pid = 03508 are used as example. The offset Δ𝒳atm (grey arrow) is estimated with respect to the ISL computed with DR1 data (red solid line). The global offset Δ𝒳WD given in Table 3 is then applied to obtain the final zero point (coloured arrow).
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