We present the simultaneous Swift and Fermi observations of the bright GRB 100728A and its afterglow. The early X-ray emission is dominated by a vigorous flaring activity continuing until 1ks after the burst. In the same time interval, high-energy emission is significantly detected by the Fermi/Large Area Telescope. Marginal evidence ofGeV emission is observed up to later times. We discuss the broadband properties of this burst within both the internal and external shock scenarios, with a particular emphasis on the relation between X-ray flares, theGeV emission, and a continued long-duration central engine activity as their power source.

Detection of high-energy gamma-ray emission during the X-ray flaring activity in GRB 100728A / Abdo, A.a., Ackermann, M., Ajello, M., Baldini, L., Ballet, J., Barbiellini, G., Baring, M.g., Bastieri, D., Bechtol, K., Bellazzini, R., Berenji, B., Bhat, P.n., Bissaldi, E., Blandford, R.d., Bonamente, E., Bonnell, J., Borgland, A.w., Bouvier, A., Bregeon, J., Brigida, M., et al.. - In: THE ASTROPHYSICAL JOURNAL LETTERS. - ISSN 2041-8205. - 734:2(2011). [10.1088/2041-8205/734/2/L27]

Detection of high-energy gamma-ray emission during the X-ray flaring activity in GRB 100728A

BISSALDI, Elisabetta;FAVUZZI, Cecilia;GIGLIETTO, Nicola;
2011

Abstract

We present the simultaneous Swift and Fermi observations of the bright GRB 100728A and its afterglow. The early X-ray emission is dominated by a vigorous flaring activity continuing until 1ks after the burst. In the same time interval, high-energy emission is significantly detected by the Fermi/Large Area Telescope. Marginal evidence ofGeV emission is observed up to later times. We discuss the broadband properties of this burst within both the internal and external shock scenarios, with a particular emphasis on the relation between X-ray flares, theGeV emission, and a continued long-duration central engine activity as their power source.
2011
Detection of high-energy gamma-ray emission during the X-ray flaring activity in GRB 100728A / Abdo, A.a., Ackermann, M., Ajello, M., Baldini, L., Ballet, J., Barbiellini, G., Baring, M.g., Bastieri, D., Bechtol, K., Bellazzini, R., Berenji, B., Bhat, P.n., Bissaldi, E., Blandford, R.d., Bonamente, E., Bonnell, J., Borgland, A.w., Bouvier, A., Bregeon, J., Brigida, M., et al.. - In: THE ASTROPHYSICAL JOURNAL LETTERS. - ISSN 2041-8205. - 734:2(2011). [10.1088/2041-8205/734/2/L27]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/52137
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