Bibcode
in't Zand, J. J. M.; Cornelisse, R.; Méndez, M.
Referencia bibliográfica
Astronomy and Astrophysics, Volume 440, Issue 1, September II 2005, pp.287-293
Fecha de publicación:
9
2005
Revista
Número de citas
45
Número de citas referidas
41
Descripción
We carried out Chandra observations of two low-luminosity low-mass X-ray
binaries, 1RXS J170854.4-321857 and 1RXS J171824.2-402934, for which
previously single X-ray bursts were detected with the Wide Field Cameras
(WFCs) on board BeppoSAX. Both were detected in our Chandra observations
in an actively accreting state three to eight years after the X-ray
bursts, with 0.5-10 keV luminosities between 5×1034 and
2×1036 erg s-1. The apparently persistent
nature is remarkable for 1RXS J171824.2-402934 given its low luminosity
of 10-3 L_Edd. The persistence of both sources also
distinguishes them from 5 other low-L bursters, which have also been
seen during bursts with the WFCs but were not detected during Chandra
observations above a luminosity of 1033 erg s-1.
Those are probably transient rather than persistent sources.