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The binary companion of PSR J1740-3052
C. G. Bassa, W. F. Brisken, G. Nelemans +3
We report on the identification of a near-infrared counterpart to the massive (>11 Msun) binary companion of pulsar J1740-3052. An accurate celestial position of PSR J1740-3052 is…
SDSS J0926+3624: The shortest period eclipsing binary star
C. M. Copperwheat, T. R. Marsh, S. P. Littlefair +12
With orbital periods of the order of tens of minutes or less, the AM Canum Venaticorum stars are ultracompact, hydrogen deficient binaries with the shortest periods of any binary s…
The Double-Peaked 2008 Outburst of the Accreting Milli-Second X-ray Pulsar, IGR J00291+5934
F. Lewis, D. M. Russell, P. G. Jonker +18
In August 2008, the accreting milli-second X-ray pulsar (AMXP), IGR J00291+5934, underwent an outburst lasting ~ 100 days, the first since its discovery in 2004. We present data fr…
The type Ib supernova 2010O: an explosion in a Wolf-Rayet X-ray binary?
G. Nelemans, R. Voss, M. T. B. Nielsen +1
The type Ib supernova 2010O was recently discovered in the interacting starburst galaxy Arp 299. We present an analysis of two archival Chandra X-ray observations of Arp 299, taken…
Spectroscopic Evidence for a 5.4-Minute Orbital Period in HM Cancri
G. H. A. Roelofs, A. Rau, T. R. Marsh +3
HM Cancri is a candidate ultracompact binary white dwarf with an apparent orbital period of only 5.4 minutes, as suggested by X-ray and optical light-curve modulations on that peri…