Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...320l..41i&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 320, Sept. 1, 1987, p. L41-L45. DOE-supported resea
Astronomy and Astrophysics
Astrophysics
7
Neutron Stars, Stellar Flares, Stellar Spectrophotometry, X Ray Binaries, X Ray Sources, Eddington Approximation, Light Curve
Scientific paper
The results of high-speed white-light photometry of five low-mass X-ray binaries (LMXB), including MXB 1735-444 (V926 Sco), are reported. It is found that MXB 1735-444 was in a previously unreported state. It showed rapid optical flaring on time scales of 10 s or less to about 20 minutes over the course of a 2 hr observation. During the bursts, the optical luminosity increased by up to a factor of five; the average optical luminosity of MXB 1735-444 was about 2 x 10 to the 34th ergs/s at these times. Qualitatively similar long type II X-ray bursts have been observed from the rapid burster, MXB 1730-335, and long X-ray bursts of undetermined type have been observed from GX 17+2 (4U 1813-14). The detection of an optical burst from the source GX 17+2 is also reported. Optical bursts have not been previously reported in this object.
Imamura James N.
Middleditch John
Steiman-Cameron Thomas Y.
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