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SPECTRAL ANALYSIS IN ORBITAL/SUPERORBITAL PHASE SPACE AND HINTS OF SUPERORBITAL VARIABILITY IN THE HARD X-RAYS OF LS I +61°303

  • Authors: Jian Li, Diego F. Torres, and Shu Zhang

Li, Torres, & Zhang 2014 The Astrophysical Journal Letters 785 L19.

  • Provider: AAS Journals

Caption: Figure 1.

Left panel: mosaic image of the LS I +61°303 sky region, derived by combining all INTEGRAL/ISGRI data. QSO 0241+622 is the brighter source (at the upper part of the image) and the relatively faint one is LS I +61°303. Corresponding significances and color can be found in the color bar to the right. The contours start at a detection significance level of 6σ, with each step being 2σ. The X- and Y-axes are R.A. and decl. in units of degrees. Right panel: long-term light curve of LS I +61°303 in 18–60 keV binned in 200 days. The dotted red line indicates a sinusoidal fitting with the superorbital period fixed.

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