Where (E_{52}) is the isotropic energy in (10^{52}) ergs, (n_0) is the density in cm(^{-3}), and (\Gamma) is the bulk Lorentz factor. The "upd better" version adds a derivation of this in – a miracle for timed exams. 3. The Jet Break Angle How do you tell if a GRB jet is pointed at us or slightly off-axis? Volume 2 teaches you the jet break time method:
[ t_{\text{peak, RS}} \approx 0.1 , \text{day} \left( \frac{E_{52}}{n_0} \right)^{1/3} \left( \frac{\Gamma}{300} \right)^{-8/3} ] grb physics for competitions vol 2 pdf upd better
Without it, solving a GRB jet break problem feels like deriving special relativity from scratch in the middle of an exam. With it, you recognize the pattern in 30 seconds. Where (E_{52}) is the isotropic energy in (10^{52})
[ \theta_j \approx 0.1 , \text{rad} \left( \frac{t_{\text{jet, break}}}{1 , \text{day}} \right)^{3/8} \left( \frac{n_0}{E_{52}} \right)^{1/8} ] The Jet Break Angle How do you tell
Solve the 5 "legacy" problems at the end of the PDF without looking at the solutions. Grade yourself brutally. These problems are harder than actual olympiad questions intentionally – a feature, not a bug.