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On the time variability of gamma-ray sources: A numerical analysis of variability indices | | Diego F. Torres
; M. E. Pessah
; Gustavo E. Romero
; | | Date: |
21 Apr 2001 | | Journal: | Astron.Nachr. 322 (2001) 223-227 | | Subject: | astro-ph gr-qc | | Abstract: | We present a Monte Carlo analysis of the recently introduced variability indices $ au$ (Tompkins 1999) and $I$ (Zhang et al. 2000 & Torres et al. 2001) for $gamma$-ray sources. We explore different variability criteria and prove that these two indices, despite the very different approaches used to compute them, are statistically correlated (5 to 7$sigma$). This conclusion is maintained also for the subset of AGNs and high latitude ($|b|>10$ deg) sources, whereas the correlation is lowered for the low latitude ones, where the influence of the diffuse galactic emission background is strong. | | Source: | arXiv, astro-ph/0104351 | | Services: | Forum | Review | PDF | Favorites | |
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