Erratum: Detection of diffuse TeV gamma-ray emission from the nearby starburst galaxy NGC 253

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dc.creatorItoh, C.
dc.creatorEnomoto, R.
dc.creatorYanagita, S.
dc.creatorYoshida, T.
dc.date2006-10-10
dc.date.accessioned2026-07-07T10:23:50Z
dc.date.available2026-07-07T10:23:50Z
dc.descriptionThe CANGAROO-II telescope observed sub-TeV gamma-ray emission from the nearby starburst galaxy NGC 253. The emission region was extended with a radial size of 0.3-0.6 degree. On the contrary, H.E.S.S could not confirm this emission and gave upper limits at the level of the CANGAROO-II flux. In order to resolve this discrepancy, we analyzed new observational results for NGC 253 by CANGAROO-III and also assessed the results by CANGAROO-II. Observation was made with three telescopes of the CANGAROO-III in October 2004. We analyzed three-fold coincidence data by the robust Fisher Discriminant method to discriminate gamma ray events from hadron events. The result by the CANGAROO-III was negative. The upper limit of gamma ray flux was 5.8% Crab at 0.58 TeV for point-source assumption. In addition, the significance of the excess flux of gamma-rays by the CANGAROO-II was lowered to less than 4 sigma after assessing treatment of malfunction of photomultiplier tubes.
dc.description6 pages, 4 figures, to appear in A&A, erratum for A&A 396, L1-L4(2002). A&A 402, 443-455(2003)
dc.identifierhttps://arxiv.org/abs/astro-ph/0610268
dc.identifierhttp://arxiv.org/abs/astro-ph/0610268
dc.identifierAstron.Astrophys.462:67-71,2007
dc.identifierdoi:10.1051/0004-6361:20066244
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/175977
dc.subjectAstrophysics
dc.titleErratum: Detection of diffuse TeV gamma-ray emission from the nearby starburst galaxy NGC 253
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