SIMBAD references

2003ApJ...584L...5F - Astrophys. J., 584, L5-L8 (2003/February-2)

The time-variable ultraluminous X-ray sources of ``The Antennae''.

FABBIANO G., ZEZAS A., KING A.R., PONMAN T.J., ROTS A. and SCHWEIZER F.

Abstract (from CDS):

We report the first results of the Chandra temporal monitoring of the ultraluminous X-ray sources (ULXs) in the Antennae galaxies (NGC 4038/4039). Observations at four different epochs, covering timescales of 2 yr to 2 months, show variability in seven out of nine ULXs, confirming that they are likely to be accreting compact X-ray binaries. The seven variable ULXs exhibit a variety of temporal and spectral behaviors: one has harder X-ray colors with decreasing luminosity, similar to the black hole binary Cyg X-1, but four other ULXs show the opposite behavior. We suggest that the latter may be black hole binaries accreting at very high rates.

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Journal keyword(s): Galaxies: Individual: NGC Number: NGC 4038/4039 - Galaxies: Interactions - Galaxies: Peculiar - X-Rays: Binaries - X-Rays: Galaxies

CDS comments: X-ray sources in fig.1 are [ZFR2002] NN, parag. 3 : M 81 X-9 = [F88] X- 9

Simbad objects: 20

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