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LONG-TERM SOFT X-RAY VARIABILITY OF ACTIVE GALAXY MRK 841
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  • LONG-TERM SOFT X-RAY VARIABILITY OF ACTIVE GALAXY MRK 841
저자명
Kim. Chul-Hee
간행물명
Journal of the Korean astronomical society
권/호정보
2008년|41권 2호|pp.17-22 (6 pages)
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한국천문학회
파일정보
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이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

We present an analysis of the soft X-ray emission of MRK 841 to investigate its long-term variation. The light variation of MRK 841 for three different energy bands of soft, medium, and hard values were studied. The maximum variability with a factor of 5 for about two years was confirmed at all three different bands. The light curves exhibit a gradual variation of brightness. In addition to a gradual variation, the short- term or micro variation was also confirmed with a factor of about two for all three different bands. The light variation of each band did not exhibit a correlation between them, but the flare event is strongest in the soft band. The hardness ratio for hard and soft bands shows irregular variation but there was no correlation between them. It was confirmed that there is a gradual decrease of the photon index. Results of our analysis are discussed within the framework of the accretion disk phenomenon.