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astro-ph.HE2026
SN 2025fhm: A central-engine powered Ic-BL supernova associated with X-ray transient EP250304a
Cui-Ying Song, Nan Jiang, Xiaofeng Wang +32
We present X-ray, optical, and radio follow-up observations of EP250304a, an extragalactic fast X-ray transient (EFXT) discovered by the Einstein Probe. Its X-ray light curve exhib…
astro-ph.HE2025
Infant Core-collapse Supernovae with Circumstellar Interactions from KMTNet I: Luminous Transitional Case of KSP-SN-2022c
Nan Jiang, Dae-Sik Moon, Yuan Qi Ni +6
We present multi-band high-cadence observations of a Type II supernova (SN) KSP-SN-2022c from a star-forming galaxy at 0.041 from its infant to nebular phase. Ea…
astro-ph.HE2024
Infant Type Ia Supernovae from the KMTNet I. Multi-Color Evolution and Populations
Yuan Qi Ni, Dae-Sik Moon, Maria R. Drout +6
We conduct a systematic analysis of the early multi-band light curves and colors of 19 Type Ia Supernovae (SNe) from the Korea Microlensing Telescope Network SN Program, including…