Colour variations in the GRB 120327A afterglow

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F17%3A00485446" target="_blank" >RIV/67985815:_____/17:00485446 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1051/0004-6361/201731759" target="_blank" >http://dx.doi.org/10.1051/0004-6361/201731759</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/201731759" target="_blank" >10.1051/0004-6361/201731759</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Colour variations in the GRB 120327A afterglow

Popis výsledku v původním jazyce

We present a comprehensive temporal and spectral analysis of the long Swift GRB120327A afterglow data to investigate possible causes of the observed early-time colour variations. We collected data from various instruments and telescopes in X-ray, ultraviolet, optical, and near-infrared bands, and determined the shapes of the afterglow early-time light curves. We studied the overall temporal behaviour and the spectral energy distributions from early to late times. The ultraviolet, optical, and near-infrared light curves can be modelled with a single power-law component between 200 and 2 x 10(4) s after the burst event. The X-ray light curve shows a canonical steep-shallow-steep behaviour that is typical of long gamma-ray bursts. At early times a colour variation is observed in the ultraviolet/optical bands, while at very late times a hint of a re-brightening is visible. The observed early-time colour change can be explained as a variation in the intrinsic optical spectral index, rather than an evolution of the optical extinction.n

Název v anglickém jazyce

Colour variations in the GRB 120327A afterglow

Popis výsledku anglicky

We present a comprehensive temporal and spectral analysis of the long Swift GRB120327A afterglow data to investigate possible causes of the observed early-time colour variations. We collected data from various instruments and telescopes in X-ray, ultraviolet, optical, and near-infrared bands, and determined the shapes of the afterglow early-time light curves. We studied the overall temporal behaviour and the spectral energy distributions from early to late times. The ultraviolet, optical, and near-infrared light curves can be modelled with a single power-law component between 200 and 2 x 10(4) s after the burst event. The X-ray light curve shows a canonical steep-shallow-steep behaviour that is typical of long gamma-ray bursts. At early times a colour variation is observed in the ultraviolet/optical bands, while at very late times a hint of a re-brightening is visible. The observed early-time colour change can be explained as a variation in the intrinsic optical spectral index, rather than an evolution of the optical extinction.n

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Astronomy & Astrophysics

ISSN

1432-0746

e-ISSN

—

Svazek periodika

607

Číslo periodika v rámci svazku

October

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

5

Strana od-do

"A29/1"-"A29/5"

Kód UT WoS článku

000414181400011

EID výsledku v databázi Scopus

2-s2.0-85032641680