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The Einstein Probe Transient EP240414a: Linking Fast X-Ray Transients, Gamma-Ray Bursts, and Luminous Fast Blue Optical Transients

  • Authors: Joyce N. D. van Dalen, Andrew J. Levan, Peter G. Jonker, Daniele Bjørn Malesani, Luca Izzo, Nikhil Sarin, Jonathan Quirola-Vásquez, Daniel Mata Sánchez, Antonio de Ugarte Postigo, Agnes P. C. van Hoof, Manuel A. P. Torres, Steve Schulze, Stuart P. Littlefair, Ashley Chrimes, Maria E. Ravasio, Franz E. Bauer, Antonio Martin-Carrillo, Morgan Fraser, Alexander J. van der Horst, Pall Jakobsson, Paul O'Brien, Massimiliano De Pasquale, Giovanna Pugliese, Jesper Sollerman, Nial R. Tanvir, Tayyaba Zafar, Joseph P. Anderson, Lluís Galbany, Avishay Gal-Yam, Mariusz Gromadzki, Tomás E. Müller-Bravo, Fabio Ragosta, Jacco H. Terwel

Joyce N. D. van Dalen et al 2025 The Astrophysical Journal Letters 982 .

  • Provider: AAS Journals

Caption: Figure 13.

Absolute magnitude of GRB afterglows at 1 and 4 days post-burst, compared with the magnitudes of EP240414a at the same epochs. The implication is that emission like the first episode (which has spectra similar to LFBOTs) could be readily hidden, but the 4 day peak would only be straightforward to hide in a minority of bursts.

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