Central engine models Y NS-NS merger model (Paczynski1986; Eichleret al 1989) v Collapsar models ( woosley 1993; Paczynski1998; MacFadyen Woosley 1999) Y Magnetar model(Usov 1992; Duncan Thompson 1992) Y NSSS phase transition models( Cheng Dai1996; Dai& Lu 1998a; Paczynski& Haensel 2005) Y Supranova models(Vietri& Stella 1998)
Central engine models ✓ NS-NS merger model (Paczynski 1986; Eichler et al. 1989) ✓ Collapsar models (Woosley 1993; Paczynski 1998; MacFadyen & Woosley 1999) ✓ Magnetar model (Usov 1992; Duncan & Thompson 1992) ✓ NS-SS phase transition models (Cheng & Dai 1996; Dai & Lu 1998a; Paczynski & Haensel 2005) ✓ Supranova models (Vietri & Stella 1998)
X-rays. visible then radio Stellar-mass black hole cretion disk (100km) Helium Collapsar IS-NS merger model Collapsar model
NS-NS merger model Collapsar model
Expectations to Swift Gehrels et al. 2004. ApJ. 611, 1005 A GRB progenitors A Early afterglows Blast wave A Short-GRB afterglows? nteraction? A Environments? A Classes of grbs? A(High-z) GRBs as astrophysical tools
Expectations to Swift GRB progenitors? Early afterglows? Short-GRB afterglows? Environments? Classes of GRBs? (High-z) GRBs as astrophysical tools? Blast wave interaction? Gehrels et al. 2004, ApJ, 611, 1005
Gehrels et al. 2004: Launch UVOT BAT on 20 November 2004 XRT Spacecraft
Gehrels et al. 2004; Launch on 20 November 2004
Discoveries in the Swift era 1. Prompt optical-IR emission and very earl optical afterglows 2. Early steep decay and shallow decay of x-ray afterglows 3. X-ray flares from long/short bursts 4. One high-redshift(3=6.295) burst 5. Afterglows and host galaxies of short bursts 6. Nearby GRB060218/SN2006aj; nearby GRB060614(=0.125)/no supernova
Discoveries in the Swift era 1. Prompt optical-IR emission and very early optical afterglows 2. Early steep decay and shallow decay of X-ray afterglows 3. X-ray flares from long/short bursts 4. One high-redshift (z=6.295) burst 5. Afterglows and host galaxies of short bursts 6. Nearby GRB060218 / SN2006aj; nearby GRB060614 (z=0.125) / no supernova