de Luca 2009 GRB090709A是典型长暴

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主要是用了XMM-Newton的数据。

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Title:		XMM-Newton and Swift observations prove GRB090709A to be a distant, standard, long GRB
Authors:		de Luca, A.; Esposito, P.; Israel, G. L.; Götz, D.; Novara, G.; Tiengo, A.; Mereghetti, S.
Affiliation:		AA(IUSS - Istituto Universitario di Studi Superiori, viale Lungo Ticino Sforza 56, 27100 Pavia, Italy; INAF/Istituto di Astrofisica Spaziale e Fisica Cosmica - Milano, via E. Bassini 15, 20133 Milano, Italy), AB(INAF/Istituto di Astrofisica Spaziale e Fisica Cosmica - Milano, via E. Bassini 15, 20133 Milano, Italy; Istituto Nazionale di Fisica Nucleare, sezione di Pavia, via A. Bassi 6, 27100 Pavia, Italy), AC(INAF/Osservatorio Astronomico di Roma, via Frascati 33, 00040 Monteporzio Catone, Italy), AD(CEA Saclay, DSM/Irfu/Service d'Astrophysique, Orme des Merisiers, Bât. 709, 91191 Gif-sur-Yvette, France), AE(INAF/Istituto di Astrofisica Spaziale e Fisica Cosmica - Milano, via E. Bassini 15, 20133 Milano, Italy), AF(INAF/Istituto di Astrofisica Spaziale e Fisica Cosmica - Milano, via E. Bassini 15, 20133 Milano, Italy), AG(INAF/Istituto di Astrofisica Spaziale e Fisica Cosmica - Milano, via E. Bassini 15, 20133 Milano, Italy)
Publication:		Monthly Notices of the Royal Astronomical Society, Volume 402, Issue 3, pp. 1870-1876. (MNRAS Homepage)
Publication Date:		03/2010
Origin:		WILEY
MNRAS Keywords:		gamma-rays: bursts, X-rays: bursts, X-rays: individual: GRB090709A
DOI:		10.1111/j.1365-2966.2009.16012.x
Bibliographic Code:		2010MNRAS.402.1870D

Abstract

GRB090709A is a long gamma-ray burst (GRB) discovered by Swift, featuring a bright X-ray afterglow as well as a faint infrared transient with very red and peculiar colours. The burst attracted a large interest because of a possible quasi-periodicity at P = 8.1s in the prompt emission, suggesting that it could have a different origin with respect to standard, long GRBs. In order to understand the nature of this burst, we obtained a target of opportunity observation with XMM-Newton. X-ray spectroscopy, based on XMM-Newton and Swift data, allowed us to model the significant excess in photoelectric absorption with respect to the Galactic value as due to a large column density (~6.5 × 10²²cm^-2) in the GRB host, located at z ~ 4.2. Such a picture is also consistent with the infrared transient's properties. Re-analysis of the prompt emission, based on International Gamma-Ray Astrophysics Laboratory and on Swift data, excludes any significant modulation at P = 8.1s. Thus, we conclude that GRB090709A is a distant, standard, long GRB.

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