Request for optical photometry of the bright X-ray binary V884 Sco (4U 1700-377)

Details Request for optical photometry of the bright X-ray binary V884 Sco (4U 1700-377) Request for optical photometry of the bright X-ray binary V884 Sco (4U 1700-377)

Jun 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aan...397....1t&link_type=abstract

AAVSO Alert Notice 397

Computer Science

V884 Sco, 4U 1700-377, High-Mass X-Ray Binary, Hmxb, Black Hole, Neutron Star, Aavso International Database

Scientific paper

Dr. Jerome Orosz (SDSU) has requested the assistance of southern bright star observers in observing the high-mass X-ray binary star V884 Sco (== 4U 1700-377). Orosz and collaborators are attempting to measure the mass of the compact object to clarify whether the object is a black hole or a neutron star. Optical photometry of the ellipsoidal variations of V884 Sco will be used in conjunction with optical spectroscopy to be performed at Las Campanas to measure the dynamical properties of the system. Orosz requests time-series B and V observations of this bright (V ~ 6.5) system beginning now (2009 June 30) and continuing through early August 2009. Observations should be submitted to the AAVSO International Database using the name V884 SCO.

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