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Fig. 3.

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Four stamps of the template-subtracted images from the PROMPT telescopes of 23 November 2018, showing the fast rise of SN 2018ivc after the explosion. Top-left: last non-detection with a threshold of 2.5σ. Top-right: First detection. Bottom-left: second, much brighter detection of the night. Bottom-right: First PROMPT image from the following night, with the source close to maximum light. The colour scales are roughly the same on all the stamps. All the green circles are centred on the position of the transient calculated by the PSF fitting and have a radius of 5″.

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