Image Details
Caption: Figure 1.
Left: last preexplosion ZTF g-band image of SN 2024iss with a limiting apparent magnitude of mg ≥ 21.0 mag at time t0. Middle: first-detection image of SN 2024iss in the ZTF i band at δt = 1.3 hr after the last nondetection, indicating a ≳50× increase in flux at a rate of >3.2 mag hr−1. Right: second detection image of SN 2024iss in the ZTF r band at 1 day after the last nondetection.
© 2026. The Author(s). Published by the American Astronomical Society.