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Resolving the Decades-long Transient FIRST J141918.9+394036: An Orphan Long Gamma-Ray Burst or a Young Magnetar Nebula?

  • Authors: B. Marcote, K. Nimmo, O. S. Salafia, Z. Paragi, J. W. T. Hessels, E. Petroff, and R. Karuppusamy

2019 The Astrophysical Journal Letters 876 L14.

  • Provider: AAS Journals

Caption: Figure 2.

Images of FIRST J1419+3940 at 1.6 GHz with the EVN on 2018 September 18 derived from the two gain calibrations performed on Tianma data (original, top, and scaled, bottom). Contours start at a 3σ rms noise level of 25 and 29 μJy beam−1, respectively, and increase by factors of ﹩\sqrt{2}﹩. The synthesized beams are represented by the dark gray ellipses at the bottom-left corner of each image.

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