rest frame light curves of swift grbs

Vanessa Mangano - Venice 2006Vanessa Mangano - Venice 2006

Rest frame light curves of Swift GRBs

Vanessa Mangano,Giancarlo Cusumano, Valentina La Parola,

Eleonora Troja, Teresa Mineo

Vanessa Mangano - Venice 2006Vanessa Mangano - Venice 2006

Outline of the Talk

• The sample of Gamma-ray burst with known redshift triggered by Swift

• Their light curves: shape and and average properties

• Energetics

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26 GRB with flares

14 GRB w/o flares

High zShortXRFothersHigh-z/XRF

8 High z/GRB

3 Short

8 XRF20 Others

1 High z/XRFThe sample

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The redshift distribution

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Nousek at al. 2006

Chincarini et al. 2005

Previous works

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luminositylight curves

with4 < z < 7

<Log Lx>=49.8 ± 0.6

<Log Lx>=48.3 ± 0.8

<Log Lx>=46.1 ± 0.6

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<Log Lx>=49.6 ± 0.5

<Log Lx>=48.3 ± 0.9

<Log Lx>=46.7 ± 0.6

luminositylight curves

with2 < z < 4

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<Log Lx>=50.19 ± 0.73

<Log Lx>=47.7 ± 0.6

<Log Lx>=46.1 ± 0.7

luminositylight curves

with1 < z < 2

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Long bursts

Short bursts

Luminosity light curves with z < 1

<Log Lx>=45.0 ± 0.8

<Log Lx>=46.0 ± 1.5

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X-ray luminosities atfixed rest frame timessince the trigger

@ 35 s@ 1 ks@ 11 hr

Only the continuum underlying flares

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Afterglow light curves with two breaks

(at least)

Light curves with one break

no breaks...

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Average properties of the light curves

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The durations of long bursts

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Nousek et al. 2006

Correlation between Eiso and the X-ray afterglow luminosity

BeppoSAX andHETE data from

Bloom et al. 2003Berger et al. 2003

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Using the larger Swift sample…..

10

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Energetics15-150 keV rest frame energy of the prompt

versus0.2-10 keV rest frame energy of the afterglow

X-rays from 35 to 1000 s X-rays from 1000 s to 11 hr

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To be continued……

Summary:

• Average properties of the luminosity light curves in rest frame studied in detail• Energetics of flares and different afteglow phases need further investigation