Demystifying an unidentified EGRET source by VHE gamma-ray observations

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dc.creatorReimer, Olaf
dc.creatorFunk, Stefan
dc.date2006-11-21
dc.date2006-11-22
dc.date.accessioned2026-07-07T10:36:37Z
dc.date.available2026-07-07T10:36:37Z
dc.descriptionIn a novel approach in observational high-energy gamma-ray astronomy, observations carried out by imaging atmospheric Cherenkov telescopes provide necessary templates to pinpoint the nature of intriguing, yet unidentified EGRET gamma-ray sources. Using GeV-photons detected by CGRO EGRET and taking advantage of high spatial resolution images from H.E.S.S. observations, we were able to shed new light on the EGRET observed gamma-ray emission in the Kookaburra complex, whose previous coverage in the literature is somewhat contradictory. 3EGJ1420-6038 very likely accounts for two GeV gamma-ray sources (E>1 GeV), both in positional coincidence with the recently reported pulsar wind nebulae (PWN) by HESS in the Kookaburra/Rabbit complex. PWN associations at VHE energies, supported by accumulating evidence from observations in the radio and X-ray band, are indicative for the PSR/plerionic origin of spatially coincident, but still unidentified Galactic gamma-ray sources from EGRET. This not only supports the already suggested connection between variable, but unidentified low-latitude gamma-ray sources with pulsar wind nebulae (3EGJ1420-6038 has been suggested as PWN candidate previoulsy), it also documents the ability of resolving apparently confused EGRET sources by connecting the GeV emission as measured from a large-aperture space-based gamma-ray instrument with narrow field-of-view but superior spatial resolution observations by ground-based atmospheric Cherenkov telescopes, a very promising identification technique for achieving convincing individual source identifications in the era of GLAST-LAT.
dc.description4 pages, 5 figures, Accepted for publication in Astrophysics and Space Science, Proc. of "The Multi-Messenger Approach to High-Energy Gamma-ray Sources (Third Workshop on the Nature of Unidentified High-Energy Sources)", Barcelona, July 4-7, 2006, one typo corrected
dc.identifierhttps://arxiv.org/abs/astro-ph/0611653
dc.identifierhttp://arxiv.org/abs/astro-ph/0611653
dc.identifierAstrophys.SpaceSci.309:203-207,2007
dc.identifierdoi:10.1007/s10509-007-9461-4
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/180115
dc.subjectAstrophysics
dc.titleDemystifying an unidentified EGRET source by VHE gamma-ray observations
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