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


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


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


The redshift distribution


Nousek at al. 2006

Chincarini et al. 2005

Previous works


luminositylight curves

with4 < z < 7

<Log Lx>=49.8 ± 0.6

<Log Lx>=48.3 ± 0.8

<Log Lx>=46.1 ± 0.6


<Log Lx>=49.6 ± 0.5

<Log Lx>=48.3 ± 0.9

<Log Lx>=46.7 ± 0.6


with2 < z < 4


<Log Lx>=50.19 ± 0.73

<Log Lx>=47.7 ± 0.6

<Log Lx>=46.1 ± 0.7


with1 < z < 2


Long bursts

Short bursts

Luminosity light curves with z < 1

<Log Lx>=45.0 ± 0.8

<Log Lx>=46.0 ± 1.5


X-ray luminosities atfixed rest frame timessince the trigger

@ 35 s@ 1 ks@ 11 hr

Only the continuum underlying flares


Afterglow light curves with two breaks

(at least)

Light curves with one break

no breaks...


Average properties of the light curves


The durations of long bursts


Nousek et al. 2006

Correlation between Eiso and the X-ray afterglow luminosity

BeppoSAX andHETE data from

Bloom et al. 2003Berger et al. 2003


Using the larger Swift sample…..

10


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


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

Rest frame light curves of Swift GRBs

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