Evidence of TeV gamma-ray emission from the nearby starburst galaxy NGC 253

Date

2003

Authors

Itoh, Chie
Enomoto, R
Yanagita, S
Yoshida, T
Tanimori, T
Okumura, K
Asahara, A
Bicknell, Geoffrey
Clay, Roger W
Edwards, Philip G

Journal Title

Journal ISSN

Volume Title

Publisher

Springer

Abstract

TeV gamma-rays were recently detected from the nearby normal spiral galaxy NGC 253 (Itoh et al. 2002). Observations to detect the Cherenkov light images initiated by gamma-rays from the direction of NGC 253 were carried out in 2000 and 2001 over a total period of ∼150 hours. The orientation of images in gamma-ray-like events is not consistent with emission from a point source, and the emission region corresponds to a size greater than 10 kpc in radius. Here, detailed descriptions of the analysis procedures and techniques are given.

Description

Keywords

Keywords: Cerenkov counters; Cosmic rays; Gamma rays; Photoemission; Cosmic dust; Galaxies Galaxies: halos; Galaxies: individual: NGC 253; Galaxies: starburst; Gamma rays: observation; ISM: cosmic rays

Citation

Source

Astronomy and Astrophysics

Type

Journal article

Book Title

Entity type

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