GX 339-4

The long-term Faulkes South light curve (some data from the RXTE ASMSwift BAT and SAAO 0.75m telescope): 

gx339-lc_7.png

Zoomed-in 2016-17 activity below

gx339-lc-2016-2017_2.png

The paper, 'Overview of an extensive multi-wavelength study of GX 339-4 during the 2010 outburst', is shown here.

The paper, 'A Variable Mid-infrared Synchrotron Break Associated with the Compact Jet in GX 339-4' is shown here.

Here are the ATels announcing the:

GX 339-4 is still in the soft state 

Flaring activity in June 2008 Brightening and polarimetry in March 2009 

Near-quiescent flux state in October 2009 New bright outburst in February 2010 

Jet fading over state transition in April 2010 Coordinated campaign with INTEGRAL, April 2010

Return of the jet in the hard state, February 2011 Back to close to quiescence, May 2011

Rising towards outburst, and a deep optical quiescent magnitude, June 2012 The rapid extreme fading of GX 339-4, July 2012

Swift X-ray observations confirm outburst of GX 339-4, August 2013 

Swift X-ray observations indicate that the 2013 outburst of GX 339-4 is probably ending

New outburst of GX 339-4 detected by Faulkes Telescope South 

Here are compilations of X-ray (RXTE) and optical/IR (SMARTS, by Michelle Buxton and Charles Bailyn) long-term light curves. To see the full image, use 'Right click -> view image'

Zoomed in view of 2014-2015 activity

gx339-lc-2015_0.png

HR-Intensity Diagram (data credit: MAXI and Swift BAT)

hr_2out.png

MAXI lightcurve

X-ray-lc.png

Zoomed in view of 2013 activity

iraf-gx339-lc-2013_1.png

 

 

Zoomed in view of 2011-2012 activity:

iraf-gx339-lc-2011-12-20120815.png

Images of GX 339-4 in quiescence are shown below (the rightmost panel is from Shahbaz, Fender & Charles 2001, A&A, 376, L17):

gx339 quiescence

 

 

 

 

The 2009 - 2011 light curve (June 2009 - May 2011; some data from the RXTE ASM and Swift BAT):

GX 339 2010

Zoom-in on hard to soft state transition; some data from the RXTE ASM and
Swift BAT):

GX 339 Hard to Soft

Colour-magnitude diagram (for more on these diagrams see here):

GX 339 CMD

Variability study on 2013-10-11 (fading hard state): fractional rms = 10%

iraf-gx339-lc32.png

Variability study on 2013-10-10 (fading hard state): fractional rms = 10%

iraf-gx339-lc31.png

Variability study on 2013-09-02 (rising hard state): fractional rms = 15%

 iraf-gx339-lc30_0.png

Variability study on 2013-08-26 (rising hard state): fractional rms = 16%

iraf-gx339-lc29.png

Variability study on 2011-04-04 and 2011-05-20 (hard state getting fainter, i'-band):

GX 339 20110404GX 339 20110520

Variability studies on 2011-02-23 and 2011-02-24 (the return of the hard state, i'-band):

GX 339 20110223

GX 339 20110224

 

Variability study on 2010-05-05 (soft state, Bessel I-band):

GX 339-4 20100505

 

Variability studies on 2010-04-23 and 2010-05-04 (soft state, V-band and i'-band):

GX 339 20100423

GX 339 20100504

 

Variability studies on 2010-04-20 and 2010-04-21 (soft state):

GX 339 20100420

GX 339 20100421

 

Variability studies on 2010-04-13 and 2010-04-15 (X-ray softening, jet probably gone):
GX 339 20100413GX 339 20100415

 

Variability study in V-band on 2010-03-26 and in i'-band on 2010-04-08 (transition started, jet still bright):
GX 339 20100326

GX 339 20100408

Variability studies on 2010-03-24 and 25:

GX 339 20100324

GX 339 20100325

 

Variability studies on 2010-03-22 and 23:
GX 339 20100322

GX 339 20100323

Variability studies on 2010-03-18 and 19:

GX 339 20100318

GX 339 20100319

 

Variability amplitude versus magnitude and flux-rms relation:
GX 339 Variability

GX 339 Variability and Flux

2009-02-22 SAAO 1.9m + HIPPO light curve:
GX 339 Hippo

 

The 2009 outburst light curve:
GX 339 2009

 

Variability study on 2009-03-19 (i'-band rms = 0.15 mag; jumps of 0.5 mags in 75 seconds):
GX 339 20090319

 

Variability study on 2009-03-16 (i'-band rms = 0.23 mag; jumps of 0.8 mags in 90 seconds):
GX 339 20090316

 

Variability study on 2008-09-19 (i'-band rms = 0.25 mag):
20080919

 

Variability study on 2008-06-30 (i'-band rms = 0.12 mag):

GX 339 20080630

We would like to acknowledge the following people and schools for helping in taking the observations of GX 339-4:

Paulet High School, Burton-on-Trent
Leonor Cabral from Cascais, Portugal
Alison Tripp (Faulkes Telescope)
Vanessa Stroud (Faulkes Telescope, Open University)
Gina Lloyd (University of Glamorgan)
Edwin Russell

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