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Recent studies of the optical counterpart of GX 1+4 |
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| Authors: | D P Sharma R K Sood G Stringfellow S D James K M Hill R K Manchanda |
| Institution: | * Department of Physics, University of Tasmania, Hobart, Australia ** Department of Physics, ADFA, Canberra, ACT, Australia *** Mount Stromlo Observatory, Canberra, ACT, Australia † Tata Institute of Fundamental Research, Bombay, India |
| Abstract: | The galactic X-ray source GX 1+4 has been undergoing remarkable changes since early 1991. The X-ray pulsar has shown fast spin down accompanied by an increase in the hard X-ray intensity. We have obtained 1.6Å resolution spectra of the optical counterpart extending the known spectrum to 8500Å. The Ca II (8498Å) line seen for the first time from this source is indicative of a nova burst scenario. Other lines detected for the first time are detailed and the significance of these features is discussed. |
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