Mathematics – Probability
Scientific paper
Mar 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011atel.3221....1c&link_type=abstract
The Astronomer's Telegram, #3221
Mathematics
Probability
23
Radio, Optical, X-Ray, Gamma Ray, >Gev, Binary, Black Hole, Neutron Star, Star, Variables
Scientific paper
Fermi LAT observations of the gamma-ray source 1FGL J1018.6-5856 (Abdo et al., 2010, ApJS, 188, 405) obtained between MJD 54682 and 55627 in the energy range 100 MeV to 200 GeV show the presence of periodic modulation with a period of 16.58 ± 0.04 days. In the power spectrum of the light curve the modulation at the 16.6 day period has a strength 23 times the mean power level, and the false alarm probability, considering periods longer than 0.5 days, is ~10-7.
Caliandro Andrea G.
Cheung Charlotte
Coe Malcolm J.
Corbet Robin H. D.
Donato Davide
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