Abstract
BURST activity was observed1 on 18 March 1978, from MXB1730–335, the rapid burster, from which no activity had been observed a few days earlier2. HEAO 1 was pointed ( + y axis) at the rapid burster from ∼ 18.00–21.00 UT on 31 March 1978. The source was actively bursting in the ‘Mode I’ pattern3, in which very large type II bursts4 are first followed by a long (several minutes) quiescent period and then by a train of closely spaced, small bursts. Because type I and type II bursts probably have different underlying physical mechanisms4, it is important to study both types over a large energy range. We report here on a search for hard X-ray emission from the rapid burster and on evidence for spectral evolution in the type II bursts.
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HOFFMAN, J., WHEATON, W., PRIMINI, F. et al. HEAO Observations of X-ray bursts from MXB1730–335. Nature 276, 587–588 (1978). https://doi.org/10.1038/276587a0
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DOI: https://doi.org/10.1038/276587a0
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