TY - JOUR
T1 - Swift observations of SAX J1808.4-3658
T2 - Monitoring the return to quiescence
AU - Campana, Sergio
AU - Stella, Luigi
AU - Kennea, Jamie A.
N1 - Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2008
Y1 - 2008
N2 - The transient accreting millisecond pulsar SAX J1808.4-3658 has shown several outbursts to date but the transition from outburst to quiescence has never been investigated in detail. Thanks to the Swift observing flexibility, we monitored for the first time the decay to quiescence during the 2005 outburst. At variance with other transients, wide luminosity variations are observed. In addition, close to quiescence, SAX J1808.4-3658 seems to switch between two different states. We interpret them in terms of the accretion states accessible to a magnetized, fast-rotating neutron star.
AB - The transient accreting millisecond pulsar SAX J1808.4-3658 has shown several outbursts to date but the transition from outburst to quiescence has never been investigated in detail. Thanks to the Swift observing flexibility, we monitored for the first time the decay to quiescence during the 2005 outburst. At variance with other transients, wide luminosity variations are observed. In addition, close to quiescence, SAX J1808.4-3658 seems to switch between two different states. We interpret them in terms of the accretion states accessible to a magnetized, fast-rotating neutron star.
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U2 - 10.1086/592002
DO - 10.1086/592002
M3 - Article
AN - SCOPUS:65349132773
VL - 684
SP - L99-L102
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 2 PART 2
ER -