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

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

2003-04-16

arxiv.org/abs/astro-ph/0304295v1

Astron.Astrophys. 402 (2003) 443-455

Astronomy and Astrophysics

Astrophysics

16 pages, 27 figures, aa.cls

Scientific paper

10.1051/0004-6361:20030247

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 $\sim$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.

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