Abstract
We present our observations of six Galactic globular clusters where the following bright X-ray sources were observed: NGC 6440, NGC 6441, NGC 6624, Terzan 1, Terzan 2, and Terzan 6. Using the Chandra observatory, we were able to achieve a localization accuracy of \(0\mathop .\limits^{''} 6\) for X-ray sources in the globular clusters. The error circle considerably decreased compared to the observations of other observatories, by more than a factor of 10 for some clusters. We detected at least one X-ray source in each of the globular clusters studied and 12 sources in the globular cluster NGC 6440. The source XB1733-30 in Terzan 1 was not detected by the Chandra observatory; we obtained an upper limit on its luminosity.
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Translated from Pis’ma v Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Zhurnal, Vol. 28, No. 4, 2002, pp. 276–280.
Original Russian Text Copyright © 2002 by Revnivtsev, Trudolyubov, Borozdin.
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Revnivtsev, M.G., Trudolyubov, S.P. & Borozdin, K.N. Localization of X-ray sources in six Galactic globular clusters from Chandra data. Astron. Lett. 28, 237–240 (2002). https://doi.org/10.1134/1.1467258
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DOI: https://doi.org/10.1134/1.1467258