We present a wide dataset of gamma-ray, X-ray, UVOIR, and radio observations of the Swift GRB100814A. At the end of the slow decline phase of the X-ray and optical afterglow, this burst shows a sudden and prominent rebrightening in the optical band only, followed by a fast decay in both bands. The optical rebrightening also shows chromatic evolution. Such a puzzling behaviour cannot be explained by a single com- ponent model. We discuss other possible interpretations, and we find that a model that incorporates a long-lived Reverse Shock and Forward Shock fits the temporal and spectral properties of GRB100814 the best. We also touch upon other GRBs presenting a behaviour similar to that of GRB100814A, such as 081029 and 100621A.

The optical rebrightening of GRB100814A: an interplay of forward and reverse shocks?

GUIDORZI, Cristiano;
2015

Abstract

We present a wide dataset of gamma-ray, X-ray, UVOIR, and radio observations of the Swift GRB100814A. At the end of the slow decline phase of the X-ray and optical afterglow, this burst shows a sudden and prominent rebrightening in the optical band only, followed by a fast decay in both bands. The optical rebrightening also shows chromatic evolution. Such a puzzling behaviour cannot be explained by a single com- ponent model. We discuss other possible interpretations, and we find that a model that incorporates a long-lived Reverse Shock and Forward Shock fits the temporal and spectral properties of GRB100814 the best. We also touch upon other GRBs presenting a behaviour similar to that of GRB100814A, such as 081029 and 100621A.
2015
M., De Pasquale; N. P., Kuin; S., Oates; S., Schulze; Z., Cano; Guidorzi, Cristiano; A., Beardmore; P., Evans; Z. L., Uhm; B., Zhang; M., Page; S., Kobayashi; A., Castro Tirado; J., Gorosabel; T., Sakamoto; T., Fatkhullin; S. B., Pandey; M., Im; P., Chandra; D., Frail; H., Gao; D., Kopac; Y., Urata; Y., Jeon; C., Akerlof; L., Huang; S., Pak; S., Zane; C., Mundell; F., Virgili; I. A., Steele; A., Melandri; A., Gomboc; N., Tanvir; C., Saxton
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/1843503
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