Open AccessOptical studies of two Large Magellanic Cloud X‐ray transients: RX J0544.1–7100 and RX J0520.5–6932
Author(s) -
Coe M.J.,
Negueruela I.,
Buckley D.A.H.,
Haigh N.J.,
Laycock S.G.T.
Publication year - 2001
Publication title -
monthly notices of the royal astronomical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.058
H-Index - 383
eISSN - 1365-2966
pISSN - 0035-8711
DOI - 10.1046/j.1365-8711.2001.04327.x
Subject(s) - physics , astrophysics , small magellanic cloud , sky , stars , transient (computer programming) , binary star , binary number , large magellanic cloud , light curve , astronomy , arithmetic , mathematics , computer science , operating system
We report observations that confirm the identities of the optical counterparts to the transient sources RX J0544.1–7100 and RX J0520.5–6932 . The counterparts are suggested to be B‐type stars. Optical data from the observations carried out at ESO and SAAO, together with results from the OGLE data base, are presented. In addition, X‐ray data from the RXTE All‐Sky Monitor are investigated for long‐term periodicities. A strong suggestion for a binary period of 24.4 d is seen in RX J0520.5–6932 from the OGLE data.