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Infrared sources in the vicinity of 2S1728-337


THE X-ray burst source MXB1728—34 (ref. 1), which is believed to be associated with the steady source 2S1728—337 (ref. 2), lies in a heavily obscured portion of the Milky Way. The infrared photometer described previously3, attached to the 1.88-m telescope at Sutherland, was therefore used to search for optically invisible sources at K (2.2 µm) in the region of the error circle of 2S1728—337. The results are presented here: five infrared sources were located.

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    Hoffman, J. A. et al. Astrophys. J. 210, L13 (1976).

  2. 2

    Jernigan, J. G., Apparao, K. M. V., Bradt, H. V., Doxsey, R. E. & McClintock, J. E. Nature 270, 321 (1977).

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    Glass, I. S. Mon. Not. R. astr. Soc. 164, 155 (1973).

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    Becklin, E. E. & Neugebauer, G. Astrophys. J. 200, L71 (1975).

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    Glass, I. S., Mon. Not. R. astr. Soc. 182, 93 (1978).

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