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.

Accepted for publication in Astrophysical Journal Letters June 30, 2009

References in corpus (8)

• The ATNF Pulsar Catalogue
• Fermi Large Area Telescope Bright Gamma-ray Source List
• TeV Gamma-Ray Sources from a Survey of the Galactic Plane with Milagro
• Discovery of TeV Gamma-Ray Emission from the Cygnus Region of the Galaxy
• Discovery of High-Energy Gamma-Ray Pulsations from PSR J2021+3651 with AGILE
• Rings and Jets around PSR J2021+3651: the `Dragonfly Nebula'
• The radio SNR G65.1+0.6 and its associated pulsar J1957+2831
• Constraints on the TeV source population and its contribution to the galactic diffuse TeV emission

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