The MXB1916-053/4U1915-05: Burst properties and constraints on a 50 minute binary secondary

Details The MXB1916-053/4U1915-05: Burst properties and constraints on a 50 minute binary secondary The MXB1916-053/4U1915-05: Burst properties and constraints on a 50 minute binary secondary

Aug 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983stin...8334862s&link_type=abstract

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Physics

Bursts, Constraints, Mass Transfer, X Rays, Accretion Disks, Angular Momentum, Binary Stars, Braking, Helium

Scientific paper

Results are presented from OSO-8 and HEAO-1 A2 observations of 34 bursts from the X-ray burster MXB1916-053/4U1915-05 recently discovered to show a 50 minute binary period. While 11 burst previously reported all had similar light curves, 22 observed two years later show a factor of 3 range of peak fluxes and decay times between 3 and 20 s. Recurrence times between successive bursts vary between 3 and 6 hours. A ratio of steady flux to average burst flux of equiv 120 is developed. A burst observed with the HEAO-1 A2 experiment showed an initial temperature rise to a peak black body temperature of equiv 3 keV followed by the cooling typical of type I bursts. The burst was unusual in that the apparent projected size of a blackbody source increased by a factor of 3 during the cooling phase.

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