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MAXI/GSC detection of an X-ray activity from GX 339-4

ATel #2380; K. Yamaoka (AGU), M. Sugizaki (RIKEN), S. Nakahira (AGU), T. Mihara, M. Kohama, Y. E. Nakagawa, T. Yamamoto (RIKEN), M. Matsuoka, K. Kawasaki, S. Ueno, H. Tomida, M. Suzuki, M. Ishikawa (JAXA), N. Kawai, M. Morii, K. Sugimori (Tokyo Tech.), A. Yoshida (AGU), H. Tsunemi, M. Kimura (Osaka U.), H. Negoro, M. Nakajima, R. Ishiwata, S. Miyoshi, H. Ozawa (Nihon U.), Y. Ueda, N. Isobe, S. Eguchi, K. Hiroi (Kyoto U.), and A. Daikyuji (Univ. of Miyazaki), on behalf of the MAXI team
on 10 Jan 2010; 16:30 UT
Credential Certification: Kazutaka Yamaoka (yamaoka@phys.aoyama.ac.jp)

Subjects: X-ray, Binary, Black Hole, Transient

Referred to by ATel #: 2384, 2455, 2459, 2523, 2525, 3117, 3191, 3383, 14351

MAXI/GSC has been detecting an X-ray activity of a black hole candidate, GX 339-4, since 2010-Jan-03 (MJD 55199). The flux averaged per day in the 4-10 keV band was almost constant at about 17 mCrab from Jan-03 to Jan-07 and 26 +/- 5 mCrab on Jan-08. The detection on Jan-02 was marginal because the source was located at the edge of the sensitivity gap of the GSC X-ray detectors. The Swift/BAT hard X-ray monitor also shows an increase in the hard X-ray flux in the 15-50 keV range. Follow-up multi-wavelength observations are encouraged.

The MAXI lightcurve and image of the source are updated daily at the following URL: http://maxi.riken.jp/sourcelist.html

Related
15615 AstroSat/SXT confirms GX 339-4 to be in the low-hard state
15598 Optical observations of the outburst of the black-hole low-mass X-ray binary GX 339-4 with LCO
15585 GX 339-4 in the low-hard state from early NICER and NuSTAR observations
15578 New outburst of GX 339-4 confirmed by Swift/XRT
15577 MAXI/GSC detection of a new X-ray outburst from GX 339-4
14953 GX 339-4 in transition back to the hard state with the compact jets in formation
14507 ATCA observations of radio flaring emission from GX 339-4 during the current hard-to-soft state transition
14505 Correction for Atel #14504
14504 Insight-HXMT detection of the hard-to-soft state transition in the black hole binary GX339-4
14494 Ongoing state transition of the BH XRB GX 339-4 confirmed in the optical by XB-NEWS
14493 A descriptive title
14490 NICER X-ray activity shows GX 339-4 undergoing a rapid state transition
14484 Detection of Low Frequency QPO in GX 339-4 with NuSTAR
14455 AstroSat observations during prolonged hard state of 2021 outburst of GX 339-4
14440 GX 339-4: INTEGRAL observations in the bright hard state
14419 Optical monitoring of GX 339-4 suggests the source is approaching state transition
14415 Optical fading of black hole LMXB XTE J1859+226 during its current mini-outburst
14400 Follow up observations of GX 339-4 with AstroSat
14384 NICER X-ray activity indicates GX 339-4 rising in hard state
14367 Detection of softening of X-ray flare from GX 339-4 using MAXI/GSC
14354 INTEGRAL hard X-ray detection of a new outburst from GX339-4
14352 Increased X-ray activity for the black hole binary GX 339-4 detected with NuSTAR and Swift/XRT
14351 Detection of X-ray flaring activity from GX 339-4 using Swift
14336 MeerKAT observations revealed a rapid rising outburst of the recurrent black hole GX339-4
13447 Swift XRT observations find GX 339-4 in the soft state in Jan 2020
13264 Swift and AstroSat monitoring of GX339-4 during its 2019 activity
13113 GX 339-4 may have reached the peak of its rebrightening
13024 X-ray and optical reflaring in GX 339-4 in July/August 2019
12690 Recent Swift Monitoring of Black Hole Candidate GX 339-4
12420 INTEGRAL GPS detects renewed activity from H1417-624 and GX 339-4
12413 Swift sees the outburst brightening of GX 339-4 in the hard state
12322 NuSTAR confirms a new outburst for the Black Hole Binary GX 339-4
12287 MeerKAT observations revealed a rising outburst of the recurrent black hole GX 339-4
11208 Swift XRT observes GX 339-4 in the hard state in Jan 2018
10864 SALT high resolution spectroscopy of GX339-4 in outburst
10825 NuSTAR Observation of GX 339-4 in the early stages of its 2017 outburst
10824 NICER Observation of Fast X-ray Flares in GX 339-4
10820 Sub-second optical flaring in GX 339-4 during the 2017 outburst early rise
10808 Radio detection of GX 339-4 in its latest outburst
10798 X-ray brightening of GX 339-4 in late September 2017
10797 New outburst of GX 339-4 detected by Faulkes Telescope South
7977 SMARTS optical re-brightening of GX 339-4
7962 GX 339-4 in transition back to the hard state after a long outburst
7649 GX 339-4 has entered the intermediate state
7434 GX 339-4 is still in the soft state
7201 GX 339-4 has left the soft state and possibly entered the intermediate state
7009 Soft state of GX 339-4 in its 2014-2015 outburst
6960 Possible ongoing hard-to-soft transition of GX 339-4
6649 Swift/BAT detects of a new X-ray outburst of GX 339-4
5594 Swift X-ray observations indicate that the 2013 outburst of GX 339-4 is probably ending
5417 GX 339-4 remains in the hard state
5285 ATCA radio detection of GX 339-4 in the rising hard state
5252 Swift X-ray observations confirm outburst of GX 339-4
5244 New outburst of the black-hole X-ray binary GX 339-4
4247 The rapid extreme fading of GX 339-4
4162 GX 339-4 is rising into outburst, and a deep optical quiescent magnitude observed by Faulkes Telescope South
3383 GX 339-4 is back in a faint state close to quiescence
3191 GX 339-4 back in the hard state: optical observations reveal the return of the jet
3117 GX 339-4 in transition towards hard states
2871 Aql X-1 in brightest outburst since 2003
2745 Witnessing with the ATCA the interaction of a relativistic jet from GX 339-4 with the interstellar medium
2593 Multiple fast state transitions in GX 339-4
2577 Transition to the soft state in GX 339-4
2573 Simultaneous INTEGRAL, RXTE, Swift and FT South observations of the transition of GX 339-4
2556 Three Harmonics of X-ray Quasi-periodic Oscillation seen in Swift/XRT and RXTE/PCA Observations of GX 339-4
2549 IR brightening and possible appearance of the compact jet in XTE J1752-223 in the hard state
2547 Optical/IR flux fading rapidly in GX 339-4: OIR jet quenching
2545 GX 339-4 in transition from the hard state
2525 Observations with the ATCA of the brightest known radio hard state in GX 339-4
2523 GX 339-4 variability evolution observed by RXTE suggests the start of a spectral transition
2459 Optical Observations of GX 339-4 in Outburst with the Faulkes Telescope South
2455 INTEGRAL observes an increasing Hard X-ray flux of GX 339-4
2384 RXTE observes hard state activity from GX 339-4
2380 MAXI/GSC detection of an X-ray activity from GX 339-4
2281 A recent Swift/XRT observation of GX 339-4 during its faint optical flux
2270 GX 339-4 Approaching Quiescence ?
1962 Optical photometry and polarimetry of GX 339-4 during its outburst rise
1960 MOST Observations of GX 339-4
1954 Renewed activity from GX 399-4
1945 Recent PCA Measurements of SAX J1747.0-2853 and GX 339-4
1588 Recent Swift XRT Observations of GX 339-4
1586 Unusual optical and X-ray flaring activity in GX 339-4
1027 Latest optical and infrared observations of GX 339-4
968 Swift-BAT detects a bright hard X-ray outburst from GX 339-4
944 Renewed Low Level X-ray Activity of GX 339-4
230 Increased radio and optical activity in GX 339-4
196 GX 339-4 in a very low luminosity state
120 State Transition of GX 339-4
107 The recent evolution of radio emission from GX 339-4
95 State Changes in GX 339-4
85 Outburst of GX 339-4