TY - GEN
T1 - GRBs with no afterglow even in the swift era?
AU - Vetere, L.
AU - Burrows, David Nelson
AU - Gehrels, N.
AU - Meszaros, Peter Istvan
AU - Wang, X.
PY - 2009/7/21
Y1 - 2009/7/21
N2 - Thanks to its great capability Swift succeeds detecting an afterglow more than 93% of the time BAT triggers a new event. In a few cases, mainly Short GRBs or late observations, XRT did not detect any emission. However, for at least seven Long GRBs XRT could not measure any X-afterglow either, even as early as 100s after the BAT trigger The detection of this new class of GRBs without any X-ray emission has raised many questions. Are these extreme naked GRB? Is this a completely new class of objects with an uncommon emission release? In this contribution we present a study on these unusual events. We analyse their peculiar behaviour in the Gamma and X-ray bands and discuss their singular origin.
AB - Thanks to its great capability Swift succeeds detecting an afterglow more than 93% of the time BAT triggers a new event. In a few cases, mainly Short GRBs or late observations, XRT did not detect any emission. However, for at least seven Long GRBs XRT could not measure any X-afterglow either, even as early as 100s after the BAT trigger The detection of this new class of GRBs without any X-ray emission has raised many questions. Are these extreme naked GRB? Is this a completely new class of objects with an uncommon emission release? In this contribution we present a study on these unusual events. We analyse their peculiar behaviour in the Gamma and X-ray bands and discuss their singular origin.
UR - http://www.scopus.com/inward/record.url?scp=67650517541&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=67650517541&partnerID=8YFLogxK
U2 - 10.1063/1.3141575
DO - 10.1063/1.3141575
M3 - Conference contribution
AN - SCOPUS:67650517541
SN - 9780735406483
T3 - AIP Conference Proceedings
SP - 370
EP - 373
BT - Probing Stellar Populations Out To The Distant Universe - Cefalu 2008 - Proceedings of the International Conference
T2 - International Conference on Probing Stellar Populations Out To The Distant Universe, Cefalu 2008
Y2 - 7 September 2008 through 19 September 2008
ER -