2007MNRAS.374L..20L

Query : 2007MNRAS.374L..20L

2007MNRAS.374L..20L - Mon. Not. R. Astron. Soc., 374, L20-L23 (2007/January-1)

Redshift degeneracy in the Eiso-Epeakrelation of gamma-ray bursts.

LI L.-X.

Abstract (from CDS):

In this Letter we show that there is a redshift degeneracy in the Eiso-Epeakrelation of gamma-ray bursts (GRBs). If a GRB has a redshift solved from the Eiso-Epeakrelation that lies in the range of 0.9 < z < 20, a GRB that has the same observed fluence and peak spectral energy but is at a different redshift in that range also satisfies the Eiso-Epeakrelation within a 1σ error, implying an extremely large error in the calculated redshift. Even if the data scatter in the Eiso-Epeakrelation is reduced by a factor of 2, the error in the predicted redshift is still large enough to prevent one from constraining the redshift meaningfully. Hence, the Eiso-Epeakrelation is not useful for determining the GRB distance.

Abstract Copyright: 2006 The Author. Journal compilation © 2006 RAS

Journal keyword(s): cosmology: theory - gamma-rays: bursts - gamma-rays: observations

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 SN 2006aj SN* 03 21 39.670 +16 52 02.27 17.96 19.11 17.40     SNIc-BL 1007 1
2 SN 2003lw SN* 08 02 30.1 -39 51 03       20.23   SNIc: 576 0
3 NAME GRB 060121 HOST Galaxy G 09 09 52.0260 +45 39 45.538       26.6   ~ 127 0
4 SN 1998bw SN* 19 35 03.17 -52 50 46.1   14.09       SNIc 1928 2
5 GRB 020903 gB 22 48 42.34 -20 46 09.3           ~ 248 1

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