Optical photometry and polarimetry of GX 339-4 during its outburst rise

Details Optical photometry and polarimetry of GX 339-4 during its outburst rise Optical photometry and polarimetry of GX 339-4 during its outburst rise

Mar 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009atel.1962....1r&link_type=abstract

The Astronomer's Telegram, #1962

Astronomy and Astrophysics

Astronomy

1

Optical, Binaries, Black Holes, Transients

Scientific paper

GX 339-4 is currently brightening at X-ray, UV, optical and radio frequencies (ATel #1945, #1954, #1960). Our monitoring campaign with the Faulkes Telescope South (ATel #1586) gives the following recent magnitudes (light curves are below; errors are ~ 0.02 mag): 2009-02-20 (MJD 54882.65): i' ~ 16.66 (and varying by ~ 0.2 mag in 10 minutes) 2009-02-21 (MJD 54883.76): V ~ 16.94, R ~ 16.46, i' ~ 16.68 2009-03-06 (MJD 54896.76): V ~ 16.37, R ~ 15.94, i' ~ 15.50 2009-03-07 (MJD 54897.76): V ~ 16.31, R ~ 15.89, i' ~ 15.65 The source brightened by 0.6, 0.5 and 1.2 mag in V, R and i' respectively in 13 days between 2009-02-21 and 2009-03-06.

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