Astronomy and astrophysics (Berlin), 2017-11, Vol.607, p.A29
- Melandri, A.
- Covino, S.
- Zaninoni, E.
- Campana, S.
- Bolmer, J.
- Cobb, B. E.
- Gorosabel, J.
- Kim, J.-W.
- Kuin, P.
- Kuroda, D.
- Malesani, D.
- Mundell, C. G.
- Nappo, F.
- Sbarufatti, B.
- Smith, R. J.
- Steele, I. A.
- Topinka, M.
- Trotter, A. S.
- Virgili, F. J.
- Bernardini, M. G.
- D’Avanzo, P.
- D’Elia, V.
- Fugazza, D.
- Ghirlanda, G.
- Gomboc, A.
- Greiner, J.
- Guidorzi, C.
- Haislip, J. B.
- Hanayama, H.
- Hanlon, L.
- Im, M.
- Ivarsen, K. M.
- Japelj, J.
- Jelínek, M.
- Kawai, N.
- Kobayashi, S.
- Kopac, D.
- LaCluyzé, A. P.
- Martin-Carrillo, A.
- Murphy, D.
- Reichart, D. E.
- Salvaterra, R.
- Salafia, O. S.
- Tagliaferri, G.
- Vergani, S. D.
2017
Volltextzugriff (PDF)
Details
- Autor(en) / Beteiligte
- Melandri, A.
- Covino, S.
- Zaninoni, E.
- Campana, S.
- Bolmer, J.
- Cobb, B. E.
- Gorosabel, J.
- Kim, J.-W.
- Kuin, P.
- Kuroda, D.
- Malesani, D.
- Mundell, C. G.
- Nappo, F.
- Sbarufatti, B.
- Smith, R. J.
- Steele, I. A.
- Topinka, M.
- Trotter, A. S.
- Virgili, F. J.
- Bernardini, M. G.
- D’Avanzo, P.
- D’Elia, V.
- Fugazza, D.
- Ghirlanda, G.
- Gomboc, A.
- Greiner, J.
- Guidorzi, C.
- Haislip, J. B.
- Hanayama, H.
- Hanlon, L.
- Im, M.
- Ivarsen, K. M.
- Japelj, J.
- Jelínek, M.
- Kawai, N.
- Kobayashi, S.
- Kopac, D.
- LaCluyzé, A. P.
- Martin-Carrillo, A.
- Murphy, D.
- Reichart, D. E.
- Salvaterra, R.
- Salafia, O. S.
- Tagliaferri, G.
- Vergani, S. D.
- Titel
- Colour variations in the GRB 120327A afterglow
- Ist Teil von
- Astronomy and astrophysics (Berlin), 2017-11, Vol.607, p.A29
- Ort / Verlag
- Heidelberg: EDP Sciences
- Erscheinungsjahr
- 2017
- Quelle
- Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals
- Beschreibungen/Notizen
- Aims. We present a comprehensive temporal and spectral analysis of the long Swift GRB 120327A afterglow data to investigate possible causes of the observed early-time colour variations. Methods. 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. Results. The ultraviolet, optical, and near-infrared light curves can be modelled with a single power-law component between 200 and 2 × 104 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.
- Sprache
- Englisch
- Identifikatoren
- ISSN: 0004-6361eISSN: 1432-0746, 1432-0756DOI: 10.1051/0004-6361/201731759Titel-ID: cdi_hal_primary_oai_HAL_hal_01645283v1
- Format
- –
- Schlagworte
- Astronomical instruments, Astrophysics, Biological evolution, Brightening, Color, dust, Extinction, Gamma ray bursts, Gamma rays, gamma-ray burst: individual: GRB 120327A, Infrared radiation, Light curve, Physics, Spectra, Spectral analysis, Ultraviolet telescopes, X ray telescopes