Synchrotron Self-inverse Compton Radiation From Reverse-shock on GRB120326A

摘要: We present multi-wavelength observations of a typical long duration GRB 120326A at $z=1.798$, including rapid using submillimeter array (SMA), and comprehensive monitoring in X-ray optical. The SMA observation provided the fastest detection to date among seven afterglows 230 GHz. prompt spectral analysis, Swift Suzaku yielded peak energy $E^{\rm src}_{\rm peak}=107.8^{+15.3}_{-15.3}$ keV equivalent isotropic $E_{\rm iso}$ as $3.18^{+0.40}_{-0.32}\times 10^{52}$ erg. temporal evolution properties optical were consistent with standard forward shock synchrotron jet collimation ($6^{\circ}.69\pm0^{\circ}.16$). modeling 2D relativistic hydrodynamic simulation also determined reasonable burst explosion radiation parameters for afterglow. light curve showed no apparent break decay index relation between ($\alpha{\rm o}-\alpha_{X}=-1.45\pm0.10$) indicated different processes Introducing self-inverse Compton from reverse is possible solution, slow afterglow supports that this plausible idea. observed well parameters, enabled determine functions describe properties. Because half events share similar current event, GRB120326A will be benchmarks further follow-ups, instruments such ALMA.