Počet záznamů: 1

Colour variations in the GRB 120327A afterglow

SYSNO ASEP	0485446
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Colour variations in the GRB 120327A afterglow
Tvůrce(i)	Melandri, A. (IT) Covino, S. (IT) Zaninoni, E. (BR) Campana, S. (IT) Bolmer, J. (DE) Cobb, B. E. (US) Gorosabel, J. (US) Kim, J.W. (KR) Kuindersma, S. (NL) Kuroda, D. (JP) Malesani, D. (IT) Mundell, C. G. (GB) Nappo, F. (IT) Sbarufatti, B. (US) Smith, R. J. (GB) Steele, I.A. (GB) Topinka, M. (IE) Trotter, G. (FR) Virgili, F. J. (GB) Bernardini, M. G. (FR) D'Avanzo, P. (IT) D'Elia, V. (IT) Fugazza, D. (IT) Ghirlanda, G. (IT) Gomboc, A. (SI) Greiner, J. (DE) Guidorzi, C. (IT) Haislip, J.B. (US) Hanayama, H. (JP) Hanlon, L. (IE) Im, M. (KR) Ivarsen, K.M. (US) Japelj, J. (SI) Jelínek, Martin (ASU-R)_ORCID Kawai, N. (JP) Kobayashi, S. (JP) Kopac, D. (SI) LaCluyze, A. (US) Martin-Carrillo, A. (IE) Murphy, D. (IE) Reichart, D. E. (US) Salvaterra, R. (IT) Salafia, O. S. (IT) Tagliaferri, G. (IT) Vergani, S. D. (KR)
Celkový počet autorů	45
Zdroj.dok.	Astronomy & Astrophysics. - : EDP Sciences - ISSN 0004-6361 Roč. 607, October (2017), A29/1-A29/5
Poč.str.	5 s.
Forma vydání	Online - E
Jazyk dok.	eng - angličtina
Země vyd.	FR - Francie
Klíč. slova	gamma-ray burst ; time-dependent photoionization ; early optical afterglow
Vědní obor RIV	BN - Astronomie a nebeská mechanika, astrofyzika
Obor OECD	Astronomy (including astrophysics,space science)
Institucionální podpora	ASU-R - RVO:67985815
UT WOS	000414181400011
EID SCOPUS	85032641680
DOI	10.1051/0004-6361/201731759
Anotace	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.
Pracoviště	Astronomický ústav
Kontakt	Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326
Rok sběru	2018

Počet záznamů: 1