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Fig. 25.

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ZTF forced-photometry light curve for SN 2020qlb binned in 30-day-long bins. We did not detect any precursor outbursts and here show the 5σ upper limits on pre-explosion outbursts. In the g- and r-bands, we typically obtain limiting magnitudes of −18 assuming that the outburst lasts for at least one month.

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