2002A&A...396L...1I

Query : 2002A&A...396L...1I

2002A&A...396L...1I - Astronomy and Astrophysics, volume 396, L1-4 (2002/12-2)

Detection of diffuse TeV gamma-ray emission from the neaby starburst galaxy NGC 253.

ITOH C., ENOMOTO R., YANAGITA S., YOSHIDA T., ASAHARA A., BICKNELL G.V., CLAY R.W., EDWARDS P.G., GUNJI S., HARA S., HARA T., HATTORI T., HAYASHI S., KABUKI S., KAJINO F., KATAGIRI H., KAWACHI A., KIFUNE T., KUBO H., KUSHIDA J., MATSUBARA Y., MIZUMOTO Y., MORI M., MORO H., MURAISHI H., MURAKI Y., NAITO T., NAKASE T., NISHIDA D., NISHIJIMA K., OKUMURA K., OHISHI M., PATTERSON J.R., PROTHEROE R.J., SAKURAZAWA K., SWABY D.L., TANIMORI T., TOKANAI F., TSUCHIYA K., TSUNOO H., UCHIDA T., WATANABE A., WATANABE S. and YOSHIKOSHI T.

Abstract (from CDS):

We report the TeV gamma-ray observations of the nearby normal spiral galaxy NGC 253. At a distance of ∼2.5Mpc, NGC 253 is one of the nearest starburst galaxies. This relative closeness, coupled with the high star formation rate in the galaxy, make it a good candidate TeV gamma-ray source. Observations were carried out in 2000 and 2001 with the CANGAROO-II 10m imaging atmospheric Cerenkov telescope. TeV gamma-ray emission is detected at the ∼11σ level with a flux of (7.8±2.5)x10–12cm–2/s at energies >0.5TeV. The data indicate that the emission region is broader than the point spread function of our telescope.

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Journal keyword(s): gamma rays: observation - galaxies: individual: NGC 253 - galaxies: starburst - cosmic rays

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NGC 253 SyG 00 47 33.134 -25 17 19.68   8.03   6.94 8.1 ~ 3336 2
2 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17434 0
3 M 1 SNR 05 34 30.9 +22 00 53           ~ 6192 1
4 V* CM Tau Psr 05 34 31.9474694616 +22 00 52.153698024           ~ 5260 0

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