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RXTE Observations of A1744-361: Correlated Spectral and Timing BehaviorWe analyze Rossi X-ray Timing Explorer (RXTE) Proportional Counter Array (PCA) data of the transient low mass X-ray binary (LMXB) system A1744-361. We explore the X-ray intensity and spectral evolution of the source, perform timing analysis, and find that A1744-361 is a weak LMXB, that shows atoll behavior at high intensity states. The color-color diagram indicates that this LMXB was observed in a low intensity spectrally hard (low-hard) state and in a high intensity banana state. The low-hard state shows a horizontal pattern in the color-color diagram, and the previously reported dipper QPO appears only during this state. We also perform energy spectral analyses, and report the first detection of broad iron emission line and iron absorption edge from A1744-361.
Document ID
20070014894
Acquisition Source
Goddard Space Flight Center
Document Type
Preprint (Draft being sent to journal)
Authors
Bhattacharyya, Sudip (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Strohmayer, Tod E. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Swank, Jean H. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Markwardt, Craig B. (NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2007
Subject Category
Astrophysics
Distribution Limits
Public
Copyright
Public Use Permitted.

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