Achromatic breaks for Swift GRBs.
Any evidence?
Stefano Covino (INAF/OAB), Daniele Malesani (SISSA), Susanna Vergani
(Dunsink), Giampiero Tagliaferri (INAF/OAB), on behalf of the MISTICI
collaboration
Zhang et al. (2006); many others…
Venice, 6 June 2006
Ghirlanda & Ghisellini (2006)
Venice, 6 June 2006
The prototype:
GRB 990510
Stanek et al. 2000
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Panaitescu et al. (2006); Panaitescu (talk)
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Blustin et al. (2006)
Della Valle et al. (2006)
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GRB 050801; Rykoff et al. (2006)
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short GRB 051221; Soderberg et al. (2006); Fox (talk)
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GRB 061224; Kann et al. (in preparation); Romano (talk); Curran et al. (poster)
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GRB 060526; Moretti et al. (poster); Halpern et al. (2006)
Venice, 6 June 2006
Summing up,
•most of the Swift GRBs do not show achromatic
breaks;
•in a few cases, however, achromatic breaks can be
singled out;
•pre-Swift: Epeak, good optical, poor X-ray coverage;
•Swift: no Epeak, X-ray coverage optimal, good
optical, complex light-curves
•Future: best use of the few good events. Is it time
to think to worlwide coordination for optical?
Venice, 6 June 2006
Venice, 6 June 2006