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Letter to the Editor
The longest thermonuclear X-ray burst ever observed?
A BeppoSAX Wide Field Camera observation of 4U 1735-44
R. Cornelisse 1,2,
J. Heise 1,
E. Kuulkers 1,2,
F. Verbunt 2 and
J.J.M. in 't Zand 1
Received 3 March 2000 / Accepted 30 March 2000
A long flux enhancement, with an exponential decay time of 86 min, is detected in 4U 1735-44 with the BeppoSAX Wide Field Cameras. We argue that this is a type I X-ray burst, making it the longest such burst ever observed. Current theories for thermonuclear bursts predict shorter and more frequent bursts for the observed persistent accretion rate.
Key words: accretion, accretion disks stars: neutron book reviews X-rays: bursts
Send offprint requests to: R. Cornelisse
Correspondence to: R.Cornelisse@sron.nl
Online publication: May 3, 2000