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HEAO 1 observations of 4U1232+07

Nature volume 281, pages 462–463 (1979)Cite this article

Abstract

While performing an analysis of the NRL HEAO 1 observations of the Virgo cluster and 3C273, we detected X-ray emission from a region between these two objects. The most satisfactory explanation is the presence of two weak X-ray sources, for which we have obtained error boxes. One source is likely to be the peculiar galaxy IC3576, suggested by Margon et al.1 as the source 2U1231+07=4U1232+07 (ref. 2). The error box resulting from combining our observations with the 4U data strengthen the X-ray identification with this extremely interesting galaxy. There are numerous possibilities for the other X-ray source, and here we discuss one, the interacting pair of galaxies NGC4410a and NGC4410b (NGC4410a/b).

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Authors and Affiliations

  1. Department of Physics and Astronomy, Northwestern University, Evanston, Illinois, 60201

    S. P. Bhavsar & M. P. Ulmer

  2. E. O. Hulburt Center for Space Research, Naval Research Laboratory, Washington, D.C., 20375

    R. G. Cruddace, K. Wood, J. Meekins, D. Yentis, W. Evans, H. Smathers, E. T. Byram, T. A. Chubb & H. Friedman

Authors
  1. S. P. Bhavsar
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  2. M. P. Ulmer
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  3. R. G. Cruddace
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  4. K. Wood
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  5. J. Meekins
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  6. D. Yentis
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  7. W. Evans
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  8. H. Smathers
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  9. E. T. Byram
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  10. T. A. Chubb
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  11. H. Friedman
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Bhavsar, S., Ulmer, M., Cruddace, R. et al. HEAO 1 observations of 4U1232+07. Nature 281, 462–463 (1979). https://doi.org/10.1038/281462a0

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  • DOI: https://doi.org/10.1038/281462a0

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