Hard X-ray transient source observed during the 1976 transatlantic flight

Details Hard X-ray transient source observed during the 1976 transatlantic flight Hard X-ray transient source observed during the 1976 transatlantic flight

May 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978cosp.meetq....f&link_type=abstract

COSPAR, Plenary Meeting, 21st, Innsbruck, Austria, May 29-June 10, 1978, Paper. 10 p.

Computer Science

Balloon Flight, Seyfert Galaxies, X Ray Sources, Balloon-Borne Instruments, Bremsstrahlung, Latitude, Radiant Flux Density

Scientific paper

Preliminary search for low flux levels in the hard X-ray data, obtained during the 1976 transatlantic balloon flight, has brought to the detection of three weak sources in a region centered around 39 deg declination and ranging from 03 h 10 m to 09 h 00 R.A. The first one can be associated with the puzzling system X-Per and the second is compatible in position with the Seyfert galaxy MCG 8-11-11. The third, located in the general direction of the anticenter, around galactic latitude 30 deg, is a transient or highly variable object. In two days, in fact, its intensity falls below the sensitivity of the detector, so indicating a variation by a factor of at least 6. No previous X-rays sources are reported at its location. A possible association with the type 1 Seyfert galaxy MKN 382 is discussed.

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