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

Bibcode
2009ATel.1962....1R
Russell, D. M.; Lewis, F.; Casella, P.; Pretorius, M. L.; Fender, R. P.; Roche, P.; Clark, S.
Bibliographical reference

The Astronomer's Telegram, #1962

Advertised on:
3
2009
Number of authors
7
IAC number of authors
0
Citations
1
Refereed citations
0
Description
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.
Type
Non-refereed
Black holes

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