The unusual gamma-ray burst GRB 101225A explained as a minor body falling onto a neutron star

S. Campana (), G. Lodato, P. D’Avanzo, N. Panagia, E. M. Rossi, M. Della Valle, G. Tagliaferri, L. A. Antonelli, S. Covino, G. Ghirlanda, G. Ghisellini, A. Melandri, E. Pian, R. Salvaterra, G. Cusumano, V. D’Elia, D. Fugazza, E. Palazzi, B. Sbarufatti and S. D.Vergani
Additional contact information
S. Campana: INAF - Osservatorio Astronomico di Brera, Via E. Bianchi 46, I-23807 Merate (LC), Italy
G. Lodato: Università degli Studi di Milano, Via Celoria 16, I-20133 Milano, Italy
P. D’Avanzo: INAF - Osservatorio Astronomico di Brera, Via E. Bianchi 46, I-23807 Merate (LC), Italy
N. Panagia: Space Telescope Science Institute, 3700 San Martin Drive
E. M. Rossi: Leiden Observatory, Leiden University, PO Box 9513, 2300 RA Leiden, The Netherlands
M. Della Valle: INAF - Osservatorio Astronomico di Capodimonte, Salita Moiariello 16, I-80131 Napoli, Italy
G. Tagliaferri: INAF - Osservatorio Astronomico di Brera, Via E. Bianchi 46, I-23807 Merate (LC), Italy
L. A. Antonelli: INAF - Osservatorio Astronomico di Roma, Via Frascati 33, I-00044 Monte Porzio (Roma), Italy
S. Covino: INAF - Osservatorio Astronomico di Brera, Via E. Bianchi 46, I-23807 Merate (LC), Italy
G. Ghirlanda: INAF - Osservatorio Astronomico di Brera, Via E. Bianchi 46, I-23807 Merate (LC), Italy
G. Ghisellini: INAF - Osservatorio Astronomico di Brera, Via E. Bianchi 46, I-23807 Merate (LC), Italy
A. Melandri: INAF - Osservatorio Astronomico di Brera, Via E. Bianchi 46, I-23807 Merate (LC), Italy
E. Pian: Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italy
R. Salvaterra: Università dell’Insubria, Via Valleggio 7, I-22100 Como, Italy
G. Cusumano: INAF - Istituto di Astrofisica Spaziale e Fisica Cosmica, Via U. La Malfa 153, I-90146 Palermo, Italy
V. D’Elia: INAF - Osservatorio Astronomico di Roma, Via Frascati 33, I-00044 Monte Porzio (Roma), Italy
D. Fugazza: INAF - Osservatorio Astronomico di Brera, Via E. Bianchi 46, I-23807 Merate (LC), Italy
E. Palazzi: INAF - Istituto di Astrofisica Spaziale e Fisica Cosmica, Sezione di Bologna, Via Gobetti 101, I-40129 Bologna, Italy
B. Sbarufatti: INAF - Osservatorio Astronomico di Brera, Via E. Bianchi 46, I-23807 Merate (LC), Italy
S. D.Vergani: INAF - Osservatorio Astronomico di Brera, Via E. Bianchi 46, I-23807 Merate (LC), Italy

Nature, 2011, vol. 480, issue 7375, 69-71

Abstract: Two views of Christmas γ-ray burst The Christmas γ-ray burst of 25 December 2010 (GRB 101225A, first detected by the Swift orbiting observatory) was a very unusual event. It was long lasting without the typical decreasing trend, its X-ray afterglow faded rapidly and its spectrum was atypical. Two papers in this issue offer very different explanations for these puzzling properties. Sergio Campana's group favours a comet crashing onto a neutron star as the cause of the outburst. Christina Thöne's group prefers a more conventional supernova mechanism, in this case involving a merger between a helium star and a neutron star.

Date: 2011
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DOI: 10.1038/nature10592

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