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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 6.

Best-fit pPXF model to the MUSE spectroscopy of the galaxy taken on July 4; the top panel shows the full spectrum, while the bottom panels show zoomed-in spectra at the locations of the Hα and [N II] (left) and [O III] (right). In all cases the observed spectrum is shown in black, with the flexible stellar population synthesis template in red and several fitted emission lines in orange. Model-subtracted residuals are shown in green, with the position of the emission lines on top in pink. The blue curves underneath the pink curve indicate the individual Gaussian line components.

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