INVESTIGADORES
ROMERO Gustavo Esteban
artículos
Título:
On the time variability of gamma-ray sources: A numerical analysis of variability indices
Autor/es:
DIEGO F. TORRES; M. E. PESSAH; GUSTAVO E. ROMERO
Revista:
ASTRONOMISCHE NACHRICHTEN
Editorial:
Wiley Interscience
Referencias:
Lugar: Weinheim; Año: 2001 vol. 322 p. 223 - 227
ISSN:
0004-6337
Resumen:
We present a Monte Carlo analysis of the recently introduced variability indices tau (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.
