Discovery of a Second Transient Low-Mass X-ray Binary in the Globular Cluster Ngc 6440
We have discovered a new transient low-mass X-ray binary, NGC 6440 X-2, with Chandra/ACIS, RXTE/PCA, and Swift/XRT observations of the globular cluster NGC 6440. The discovery outburst (2009 July 28-31) peaked at LX ~ 1.5 × 1036 erg s-1 and lasted for 21, B>22 in quiescence from archival Hubble Space Telescope imaging, g'>22 during the August
Heinke, C. O. et al.
Fecha de publicación:
5
2010