Estudio óptico de LMXBS con alta resolución temporal evidencia de flares no térmicos en MXB 1735-44
We present a search for ultrafast optical variability among some low-mass X-ray binaries (LMXBS) using MANIA complex (Multichannel Analisys of Nanosecond Intensity Alterations) attached to the 2.15 m telescope of CASLEO. Two flares of ∼ 0.25 sec in duration were recorded from the MXB 1735-44 X-ray b...
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| Autores principales: | , , , , , |
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| Formato: | Articulo Comunicacion |
| Lenguaje: | Español |
| Publicado: |
1992
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| Materias: | |
| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/143883 |
| Aporte de: |
| Sumario: | We present a search for ultrafast optical variability among some low-mass X-ray binaries (LMXBS) using MANIA complex (Multichannel Analisys of Nanosecond Intensity Alterations) attached to the 2.15 m telescope of CASLEO. Two flares of ∼ 0.25 sec in duration were recorded from the MXB 1735-44 X-ray burster. Brightness of the object increased 15-30 times during these flares, with very steep forward fronts (characteristic rising time being ∼ 0.05-0.06 sec), and displaying a fine structure in time-scale of 0.005-0.006 sec (confidence level > 95%). Brightness temperatures of these phases within the flares were more than 5x10⁷,10⁸ K, respectively, which can only be explained by non-thermal processes. These results are an evidence that in MXB 1735-44 there exist some departures from standard model of accretion onto compact objects. |
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