An upper limit to 300 GeV gamma ray emission from Centaurus A

Details An upper limit to 300 GeV gamma ray emission from Centaurus A An upper limit to 300 GeV gamma ray emission from Centaurus A

Feb 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...228..327c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 228, no. 2, Feb. 1990, p. 327-330. Research supported by SERC.

Astronomy and Astrophysics

Astronomy

15

Active Galaxies, Gamma Ray Astronomy, X Ray Sources, Centaurus Constellation, Cerenkov Radiation, Gamma Ray Telescopes, Radio Jets (Astronomy)

Scientific paper

The nearby active galaxy Centaurus A (NGC 5128) which has been previously identified as a source of very high energy gamma rays has been observed with the Narrabri very high energy (VHE) gamma ray telescope. A total of 44 h of data collected between March 29, 1987 and April 20, 1988 place an upper limit on the gamma ray emission of 7.8 x 10 to the -11th photons/sq cm/s at a threshold energy of 300 GeV. A corresponding 3 sigma upper limit of 2.5 x 10 to the 41st erg/s is found for the luminosity of greater than 250 GeV gamma rays, a result which is compared with an earlier result at E greater than 300 GeV.

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