Bibcode
Russell, D. M.; Buxton, M.; Lewis, F.; Altamirano, D.
Referencia bibliográfica
The Astronomer's Telegram, #2547
Fecha de publicación:
4
2010
Número de citas
4
Número de citas referidas
3
Descripción
The transient black hole candidate GX 339-4 is currently softening in
X-ray, making a transition out of the hard state (ATel #2545). We are
monitoring the source with the Faulkes Telescope South (located at
Siding Spring, Australia) and the SMARTS 1.3m telescope and ANDICAM
instrument (at Cerro Tololo, Chile). From the Faulkes monitoring, the
source brightened in the hard state over the last five months from a
faint (V = 19.6, R = 18.8, i' = 18.6; errors are 0.1 mag at most)
magnitude on 2009-10-22 = MJD 55126 (ATel #2270) to a bright (V = 15.1,
R = 14.5, i' = 14.3, V-i' = 0.79) one on 2010-04-01 = MJD 55287 (with a
very bright radio jet; ATel #2525).