GRBs x-raying Galaxies

• Long (>2s) Gamma Ray Bursts:
• Collapse of massive stars
• Produce γ-ray
• Detected through any obscuration
• Detected at z=0-10
• X-ray, Opt, … Radio
• Follow blue light, general SF
• But: avoid high-Z galaxies
• SF, low-mass galaxies

• Idea:
• X-ray tomography
• Can we reconstruct the galaxy from LOS densities