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Fig. 1


Mosaic of the images of the GRB 980425 host. The R-band is from Sollerman et al. (2005) and the remaining images are presented here for the first time. North is up and east is to the left. Each panel is 80′′ × 80′′ (14 kpc × 14 kpc). The scale is indicated on the 10 cm image, whereas the FWHM beamsize is shown on each panel as a filled circle or ellipse. The red and blue circles show the GRB position and the WR region, respectively. Blue and green crosses on the 100 μm image show the star-forming regions with high electron density ne > 145 cm-3 and age ≥ 6 Myr, respectively (see Sect. 5.2). The ALMA 2.8 mm image is shown as 3.5, 4, and 5σ contours on the 0.2 μm image. The 870 μm image has been inverted.

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