2010A&A...511A..43G


Query : 2010A&A...511A..43G

2010A&A...511A..43G - Astronomy and Astrophysics, volume 511, A43-43 (2010/2-2)

Spectral-luminosity relation within individual Fermi gamma rays bursts.

GHIRLANDA G., NAVA L. and GHISELLINI G.

Abstract (from CDS):

We study the spectra of all long gamma ray bursts (GRBs) of known redshift detected by the Fermi satellite untill the end of July 2009. Their fluxes and fluences are large enough to allow a time dependent study of their spectral characteristics in the 8keV-1MeV energy range. We find that the peak energy Epeak of their EL(E) spectrum correlates with the luminosity in a remarkably tight way within individual bursts. This time-resolved Epeak-Liso correlation is very similar for all the considered bursts and has a slope and normalisation similar to the analogous Epeak-Liso correlation defined by the time-integrated spectra of different bursts detected by several different satellites. For a few of the considered GRBs, we could also study the behaviour of the Epeak-Liso correlation during the rising and decaying phases of individual pulses within each burst, finding no differences. Our results indicate the presence of a similar physical mechanism, operating for the duration of different GRBs, tightly linking the burst luminosity with the peak energy of the spectrum emitted at different times. Such a physical mechanism is the same during the rise and decay phase of individual pulses composing a GRB. While calling for a robust physical interpretation, these results strongly indicate that the Epeak-Liso spectral energy correlation found considering the time-integrated spectra of different bursts is real and not the result of instrumental selection effects.

Abstract Copyright:

Journal keyword(s): stars: gamma-rays bursts: general

Simbad objects: 20

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Number of rows : 20
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 Fermi bn081222204 gB 01 30 57.76 -34 05 44.0           ~ 167 0
2 GRB 061007 gB 03 05 19.510 -50 30 02.50 14.28 14.40 12.95     ~ 283 1
3 GRB 080913 gB 04 22 57.90 -25 07 38.6           ~ 185 0
4 Fermi bn081121858 gB 05 57 07.70 -60 36 42.1           ~ 126 0
5 Fermi bn090328401 gB 06 02 39.69 -41 52 55.1           ~ 158 1
6 Fermi bn080928628 gB 06 20 16.85 -55 11 59.3           ~ 153 0
7 Fermi bn080916009 gB 07 59 23.24 -56 38 16.8           ~ 343 0
8 GRB 081028 gB 08 07 34.40 +02 18 16.8           ~ 103 0
9 Fermi bn090102122 gB 08 32 59.50 +33 06 25.7           ~ 205 0
10 Fermi bn090423330 gB 09 55 33.19 +18 08 57.7           ~ 339 0
11 Fermi bn090424592 gB 12 38 07.40 +16 49 45.9           ~ 224 0
12 Fermi bn090323002 gB 12 42 50.28 +17 03 11.9           ~ 201 1
13 GRB 090418A gB 17 57 15.17 +33 24 21.1           ~ 83 0
14 Fermi bn080905499 gB 19 10 39.10 -18 51 55.4           ~ 160 0
15 Fermi bn090618353 gB 19 36 01.80 +78 21 07.1           ~ 302 0
16 Fermi bn090510016 gB 22 14 12.60 -26 35 51.1           ~ 473 1
17 Fermi bn080916406 gB 22 25 09.30 -57 01 33.7           ~ 150 0
18 SN 2008hw SN* 22 39 50.39 -40 08 49.1           SNIc 162 1
19 Fermi bn080810549 gB 23 47 08.00 +00 18 35.1           ~ 203 0
20 GRB 081007B gB ~ ~           ~ 3 0

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2023.01.31-07:55:37

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