UHURU observations of an X-ray burst at high galactic latitude centered on the X-ray globular cluster NGC 1851

Details UHURU observations of an X-ray burst at high galactic latitude centered on the X-ray globular cluster NGC 1851 UHURU observations of an X-ray burst at high galactic latitude centered on the X-ray globular cluster NGC 1851

Aug 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...207l.177f&link_type=abstract

Astrophysical Journal, vol. 207, Aug. 1, 1976, pt. 2, p. L177-L180.

Astronomy and Astrophysics

Astronomy

26

Globular Clusters, Uhuru Satellite, X Ray Sources, Collimators, Energy Spectra, Spaceborne Astronomy

Scientific paper

An X-ray burst from a 0.5 x 10 deg region centered near NGC 1851 (MX 0513-40) was detected in observations made with the Uhuru X-ray observatory on September 19, 1972. The source was observed for 15 seconds with a peak rate of 0.5 that of the Crab (2-6 keV) and was not detected above 0.01 of the Crab in observations 4.5 minutes before or after this event. During the observation, the spectrum developed a low-energy cutoff. NGC 1851 is the second globular cluster identified as a source of X-ray bursts, which suggests that all X-ray bursts may originate in globular clusters, some of which may be optically obscured.

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