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Speaker |
Zaninoni, Elena |
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Coauthors |
Bernardini, Maria Grazia; Margutti, Raffaella; Amati, Lorenzo |
| Talk Title |
The GRB Universal Scaling E_{X,iso} - E_{gamma,iso} - E_{pk} With Ten Years Of Swift Data |
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Abstract |
With the data collected until June 2014, we have updated and confirmed the existence of the three-parameter correlation for gamma-ray bursts (GRBs) that involves the isotropic energy emitted in the rest frame 1-10^4 keV energy band during the prompt emission (E_{gamma;iso}), the rest frame peak of the prompt emission energy spectrum (E_{pk}), and the X-ray energy emitted in the rest-frame 0.3-30 keV observed energy band (E_{X;iso}), computed excluding the contribution of flares. The importance of this universal correlation is that it connects the prompt and afterglow properties of both long and short GRBs. We verify that it does not depend on redshift or on the X-ray light-curve morphology and we discuss about the behavior of the peculiar objects as ultra-long GRBs. Moreover we propose the existence of an intermediate group between long and short GRBs. Interestingly, two GRBs with uncertain classification fall into this category. Finally, we discuss the physics underlying this correlation. |
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