Abstract
We present the results of our optical identification of the hard X-ray source IGR J18257-0707 through its spectrophotometric observations with the optical RTT-150 telescope. The accurate position of the X-ray source determined using Chandra observations has allowed this source to be confidently associatedwith a faint optical object (m R ≈ 20.4) whose optical spectrumexhibits a broad H α emission line at redshift z = 0.037. Thus, the source IGR J18257-0707 is a type-1 Seyfert galaxy at redshift z = 0.037.
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Original Russian Text © R.A. Burenin, I.F. Bikmaev, M.G. Revnivtsev, J.A. Tomsick, S.Yu. Sazonov, M.N. Pavlinsky, R.A. Sunyaev, 2009, published in Pis’ma v Astronomicheskiĭ Zhurnal, 2009, Vol. 35, No. 2, pp. 83–86.
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Burenin, R.A., Bikmaev, I.F., evnivtsev, M.G. et al. Optical identification of the hard X-ray source IGR J18257-0707. Astron. Lett. 35, 71–74 (2009). https://doi.org/10.1134/S1063773709020017
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DOI: https://doi.org/10.1134/S1063773709020017