Simultaneous long-term monitoring of LS I +61°303 by OVRO and Fermi-LAT
Abstract
Previous long-term monitorings of the γ-ray-loud X-ray binary LS I +61°303 have revealed the presence of a long-term modulation of ∼4.5 yr. After 9 yr of simultaneous monitoring of LS I +61°303 by the Owens Valley Radio Observatory and the Fermi-LAT, two cycles of the long-term period are now available. Here we perform timing analysis on the radio and the γ-ray light curves. We confirm the presence of previously detected periodicities at both radio and GeV γ-ray wavelengths. Moreover, we discover an offset of the long-term modulation between radio and γ-ray data which could imply different locations of the radio (15 GHz) and GeV emission along the precessing jet.
Additional Information
© 2018 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/about_us/legal/notices). Accepted 2018 April 20. Received 2018 April 16; in original form 2018 February 14. Published: 25 April 2018. We thank Eduardo Ros for reading the manuscript. FJ thanks Walter Alef and Helge Rottmann for granting computing time at the Max Planck Institute for Radio Astronomy (MPIfR) correlator cluster. This work has made use of public Fermi data obtained from the High Energy Astrophysics Science Archive Research Center (HEASARC), provided by National Aeronautics and Space Administration (NASA) Goddard Space Flight Center. The Owens Valley Radio Observatory (OVRO) 40 m Telescope Monitoring Program is supported by NASA under awards NNX08AW31G and NNX11A043G, and by the National Science Foundation (NSF) under awards AST-0808050 and AST-1109911.Attached Files
Published - sty1037.pdf
Accepted Version - 1804.07692.pdf
Supplemental Material - sty1037_supp.zip
Files
Additional details
- Eprint ID
- 88697
- Resolver ID
- CaltechAUTHORS:20180809-125346049
- NNX08AW31G
- NASA
- NNX11A043G
- NASA
- AST-0808050
- NSF
- AST-1109911
- NSF
- Created
-
2018-08-09Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field