Gamma-ray quiet fast X-ray transients (FXTs) provide a new approach for studying relativistic explosions that evade traditional gamma-ray triggers. In this work, we present multi-wavelength observations and analysis of EP260119a, a high-$z$ FXT detected by Einstein Probe/WXT and followed up with COLIBR\'I, the Liverpoo...
C. Angulo-Valdez, A. Kuwata, E. Aguilar-Ruiz et al.· 1 citation
Soft X-ray flashes (XRFs) are predicted from a variety of hypothesized phenomena, including"dirty fireballs"(relativistic jets with significant baryon loading), and gamma-ray bursts viewed marginally off-axis. For a given burst, detailed multiwavelength observations are necessary for distinguishing between possible pro...
G. Schroeder, A. Y. Q. Ho, Gavin P. Lamb et al.· 0 citations
SN 2025wny is a gravitationally lensed, hydrogen-poor superluminous supernova (SLSN-I) at z = 2.015. To date, it is the most extensively observed high-redshift core-collapse SN and has the most detailed rest-frame UV observations of any SLSN. We present densely sampled rest-frame UV-to-optical photometry and spectrosco...
Maggie L. Li, Lin Yan, A. Gkini et al.· 0 citations
We present space-based follow-up observations of the superluminous Type I supernova (SLSN-I) SN 2025wny at redshift $z_{SN}=2.0151$, gravitationally lensed by two galaxies at redshifts $z_{G1}=0.3755$ and $z_{G2}=0.3766$ into five resolved images. SN 2025wny is the first strongly lensed SLSN discovered and the first ga...
A. Goobar, J. Johansson, E. Mörtsell et al.· 0 citations
We present spatially resolved spectra and infer the time-delays between the multiple images of the strongly gravitationally lensed superluminous supernova (SLSN) 2025wny at z=2.015. SN 2025wny is the first known spatially resolved strongly lensed SLSN and provides a unique opportunity to measure lensing delays through...
J. Johansson, E. Mörtsell, A. Goobar et al.· 0 citations
We present photometric time-delay measurements of SN 2025wny, the first strongly lensed Type I superluminous supernova (SLSN-I), discovered at $z = 2.015$. Time-delay measurements from strongly lensed supernovae provide an independent probe of cosmology and the Hubble constant, $H_0$, without reliance on the local dist...
Alice Townsend, S. Dhawan, E. Hayes et al.· 0 citations
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