Milagro Observations of Multi-TeV Emission from Galactic Sources in the Fermi Bright Source List
Abstract
We present the result of a search of the Milagro sky map for spatial correlations with sources from a subset of the recent Fermi Bright Source List (BSL). The BSL consists of the 205 most significant sources detected above 100 MeV by the Fermi Large Area Telescope. We select sources based on their categorization in the BSL, taking all confirmed or possible Galactic sources in the field of view of Milagro. Of the 34 Fermi sources selected, 14 are observed by Milagro at a significance of 3 standard deviations or more. We conduct this search with a new analysis which employs newly-optimized gamma-hadron separation and utilizes the full 8-year Milagro dataset. Milagro is sensitive to gamma rays with energy from 1 to 100 TeV with a peak sensitivity from 10-50 TeV depending on the source spectrum and declination. These results extend the observation of these sources far above the Fermi energy band. With the new analysis and additional data, multi-TeV emission is definitively observed associated with the Fermi pulsar, J2229.0+6114, in the Boomerang Pulsar Wind Nebula (PWN). Furthermore, an extended region of multi-TeV emission is associated with the Fermi pulsar, J0634.0+1745, the Geminga pulsar.
Keywords
Cite
@article{arxiv.0904.1018,
title = {Milagro Observations of Multi-TeV Emission from Galactic Sources in the Fermi Bright Source List},
author = {A. A. Abdo and B. T. Allen and T. Aune and D. Berley and C. Chen and G. E. Christopher and T. DeYoung and B. L. Dingus and R. W. Ellsworth and M. M. Gonzalez and J. A. Goodman and E. Hays and C. M. Hoffman and P. H. Huentemeyer and B. E. Kolterman and J. T. Linnemann and J. E. McEnery and T. Morgan and A. I. Mincer and P. Nemethy and J. Pretz and J. M. Ryan and P. M. Saz Parkinson and A. Shoup and G. Sinnis and A. J. Smith and V. Vasileiou and G. P. Walker and D. A. Williams and G. B. Yodh},
journal= {arXiv preprint arXiv:0904.1018},
year = {2009}
}
Comments
Accepted for publication in Astrophysical Journal Letters June 30, 2009