Start of OIR reflare in GX 339-4

Astronomy and Astrophysics – Astronomy

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Infra-Red, Optical, Binaries, Black Holes, Transients

Scientific paper

Observations of GX 339-4 taken with the SMARTS 1.3m telescope at CTIO show that it has increased significantly at infrared wavelengths, indicating the beginning of an optical/infrared (OIR) reflare. The change in magnitudes between MJD 53476.3 and MJD 53482.3 are as follows: dV = 0.4, dI = 0.5, dJ = 0.8, dH = 1.0. We have observed this OIR reflare phenomenon during the 2002/2003 outburst of GX 339-4 (Buxton et al., in prep.) and in 4U 1543-47 (Buxton & Bailyn, 2004, ApJ, 615, 880) and XTE J1550-564 (Jain et al., 2001, ApJ, 554, L181).

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