Swift and optical observations of GRB 050401

De Pasquale, Massımılıano; Beardmore, AP; Barthelmy, SD; Boyd, P; Burrows, DN; Fink, R; Gehrels, N; Kobayashi, S; Mason, KO; McNought, R; Nousek, JA; Page, KL; Palmer, DM; Peterson, BA; Price, PA; Rich, J; Roming, P; Rosen, SR; Sakamoto, T; Schmidt, BP; Tueller, J; Wells, AA; Zane, S; Zhang, B; Ziaeepour, H

doi:10.1111/j.1365-2966.2005.09787.x

Swift and optical observations of GRB 050401

Atıf İçin Kopyala

De Pasquale M., Beardmore A., Barthelmy S., Boyd P., Burrows D., Fink R., ...Daha Fazla

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, cilt.365, sa.3, ss.1031-1038, 2006 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 365 Sayı: 3
Basım Tarihi: 2006
Doi Numarası: 10.1111/j.1365-2966.2005.09787.x
Dergi Adı: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Sayfa Sayıları: ss.1031-1038
İstanbul Üniversitesi Adresli: Hayır

Özet

We present the results of the analysis of gamma-ray and X-ray data of GRB 050401 taken with the Swift satellite, together with a series of ground-based follow-up optical observations. The Swift X-ray light curve shows a clear break at about 4900 s after the gamma-ray burst (GRB). The decay indices before and after the break are consistent with a scenario of continuous injection of radiation from the 'central engine' of the GRB to the fireball. Alternatively, this behaviour could result if ejecta are released with a range of Lorentz factors, with the slower shells catching up the faster at the afterglow shock position. The two scenarios are observationally indistinguishable.