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Fig. 3.

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Light curves of AT 2021hdr. From top to bottom: Swift/XRT in the 0.5–10 keV energy band, Swift/UVOT in the UVW2 (blue triangles) and UVM2 (pink circles), and ZTF in the g (green crosses) and r (red triangles) bands. Dates are between August 8, 2022, and March 31, 2024.
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