On the time variability of gamma-ray sources
Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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On the time variability of gamma-ray sources. / F. Torres, Diego; Pessah, Martin Elias; E. Romero, Gustavo.
I: Astronomische Nachrichten, Bind 322, Nr. 4, 30.10.2001, s. 223-227.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - On the time variability of gamma-ray sources
AU - F. Torres, Diego
AU - Pessah, Martin Elias
AU - E. Romero, Gustavo
PY - 2001/10/30
Y1 - 2001/10/30
N2 - 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.
AB - 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.
KW - astro-ph
KW - gr-qc
U2 - 10.1002/1521-3994(200110)322:4<223::AID-ASNA223>3.0.CO;2-K
DO - 10.1002/1521-3994(200110)322:4<223::AID-ASNA223>3.0.CO;2-K
M3 - Journal article
VL - 322
SP - 223
EP - 227
JO - Astronomische Nachrichten
JF - Astronomische Nachrichten
SN - 0004-6337
IS - 4
ER -
ID: 34382900