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Near Infrared Observations of Cygnus X-3

Naturevolume 247pages446447 (1974) | Download Citation



THE system known as Cygnus X-3 has been extensively studied at radio wavelengths (where it exhibits extraordinary variability1–3), in X rays (where it exhibits a 4.8 h period4–6), and in the infrared at 1.6 and 2.2 µm (where it also displays a 4.8 h period as well as large flares7,8). Attempts have also been made to detect Cyg X-3 in visual and near infrared wavelengths9,10. Here we present the results of a series of observations made at near infrared wavelengths, λeffective 0.85 µm on ten nights in July and August 1973.

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  1. Institute for Advanced Study, Princeton, New Jersey, 08540

  2. Princeton University, Princeton, New Jersey, 08540



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