| Autor: |
M. Pakull, Arvind Parmar, K. Beuermann, Jean-Marc Bonnet-Bidaud, C. Motch, M. van der Klis |
| Rok vydání: |
1988 |
| Předmět: |
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| Zdroj: |
Advances in Space Research. 8:405-409 |
| ISSN: |
0273-1177 |
| Popis: |
The X-ray source LMC X-2 was observed with EXOSAT for -8hours on February 2nd, 1984 with simultaneous photometric and spectroscopic optical coverage. The source was seen at a luminosity of L x ∼ 1.5 10 38 erg.s −1 with a mean X-ray spectrum which can be described equally well by either a superposition of a thermal emission of a thin hot (T th ∼5keV) plasma and a cooler blackbody radiation (T bb ∼1.3keV) or by a comptonized thermal (T co ∼3keV) radiation. There is no evidence of iron line. The mean source spectrum is found very alike those of the bright galactic bulge sources. The source is however only moderately variable in X-rays with spectral variations similar to those of Sco X-1 in quiescent state. No coherent periodic (0.016–2500s) pulsations are detected. Large photometric optical variations are present which suggest an orbital period of 6.4h though at a low level of significance. There is no clear correlation however between X-ray and optical variations. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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