Using the public archive of the MAXI GSC data, we calculated the Hardness-Intensity diagrams (HIDs) and Color-Color diagrams (CCDs) of the

representative low-mass X-ray binaries (LMXBs) and black hole candidates (BHCs). The public MAXI GSC data are available in three energy bands, and

are convenient to calculate the HIDs and CCDs. We could observe evolution of the spectral states with HID and CCD throughout the outburst for some X-

ray transients.

The observation result of Galactic X-ray sources by MAXIMasaki Ishikawa(10), Satoshi Nakahira(1), Kazutaka Yamaoka(1), Mutsumi Sugizaki(2), Yoshihiro Ueda(3),

Hitoshi Negoro(4), Ken Ebisawa(5), Nobuyuki Kawai(6,2), Masaru Matsuoka(2,7), Hiroshi Tsunemi(8), Arata

Daikyuji(9), Satoshi Eguchi(3), Kazuo Hiroi(3), Ryoji Ishiwata(4), Naoki Isobe(3), Kazuyoshi Kawasaki(7),

Masashi Kimura(8), Mitsuhiro Kohama(2,7), Tatehiro Mihara(2), Sho Miyoshi(4), Mikio Morii(6), Yujin E.

Nakagawa(11), Motoki Nakajima(12), Hiroshi Ozawa(4), Tetsuya Sootome(2), Kousuke Sugimori(6), Motoko

Suzuki(2), Hiroshi Tomida(7), Shiro Ueno(7), Takayuki Yamamoto(2), Atsumasa Yoshida(1,2) and the MAXI team.

(1)Department of Physics and Mathematics, Aoyama Gakuin University, (2)Coordinated Space Observation and Experiment Research Group, Institute of Physical and Chemical

Research (RIKEN), (3) Department of Astronomy, Kyoto University, (4)Department of Physics, Nihon University, (5)Department of Space Science Information Analysis, Institute

of Space and Astronautical Science, Japan Aerospace Exploration Agency , (6)Department of Physics, Tokyo Institute of Technology, (7)ISS Science Project Office, Institute of

Space and Astronautical Science, Japan Aerospace Exploration Agency, (8)Department of Earth and Space Science, Osaka University, (9)Department of Applied Physics,

University of Miyazaki, (10)School of Physical Science, Space and Astronautical Science, The graduate University for Advanced Studies (Sokendai), (11)High Energy Astrophysics

Laboratory, Institute of Physical and Chemical Research (RIKEN), (12)School of Dentistry at Matsudo, Nihon University,

Single transient peak X-ray Novae

Z-source X-ray Nova

1. Introduction:

LMXBs are known to

wander several different

spectral states, which may be

related to the geometry of the

accretion flow. Because

different spectra state shows

different correlation between

the X-ray intensity and the

spectral shape, it is convenient

to use the correlation diagrams

to show the spectral state. The

correlation diagrams often used

are the hardness-intensity

diagram (HID) and the color-

color diagram (CCD). MAXI

releases the GSC data,

especially the count rates, in

three energy bands. We can

easily calculate the HID and

CCD using these public data.

In this paper, we present the

HIDs and CCDs for some

selected LMXBs and BHCs,

and compare them with the past

results.

4. Conclusion.

We calculated the HIDs and

CCDs for some selected

LMXBs and BHCs using the

public MAXI GSC data. We

could confirm the known

patterns in the HIDs and CCDs

for the persistent sources. On

the other hand, we could

observe the state transition

throughout the outbursts for

transient sources.

Accumulation of such data for

transient sources may be

important to reveal the general

tendency of the state transition

with the evolution of the

outbursts.

2. Analysis Results of Black Hole Candidate (BHC)

3. Analysis Results of Neutron Star

5. Refernece.

a. arXiv:1007.0801v1

[astro-ph.HE] 6 Jul 2010.

XTE J1752-223

0

0.5

1

1.5

2

2.5

3

0 0.2 0.4 0.6 0.8 1 1.2 1.4

4-1

0 k

eV

/2-4

keV

2-20 keV(c/s/cm2)

XTE J1752-223 Hardness-Intensity Diagram(1orbit)

A

B

C

D

E

F

G

h

0.0

0.5

1.0

0.0 0.5 1.0 1.5 2.0 2.5 3.0

10

-20

keV

/4-1

0k

eV

4-10keV/2-4keV

XTE J1752-223 Color Color Diagram(1orbit)

A

B

C

D

E

F

G

h

Sco X-1(Neutron Star)

0.7

0.9

1.1

1.3

1.5

1.7

1.9

20 30 40 50 60 70 80

4-1

0 k

eV

/2-4

keV

2-20 keV(c/s/cm2)

Sco X-1 Hardness-Intensity Diagram(1orbit)

4-10 keV/2-4 keV

0.05

0.10

0.15

0.20

0.25

0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9

10

-20

keV

/4-1

0k

eV

4-10keV/2-4keV

Sco X-1 Color Color Diagram(1orbit)

4-10 keV/2-4

keV

CygX-2(Neutron Star)

0.50

1.00

1.50

2.00

0.00 0.50 1.00 1.50 2.00

4-1

0 k

eV

/2-4

keV

2-20 keV(c/s/cm2)

Cyg X-2 Hardness-Intensity Diagram(1day)

4-10

keV/2-4 keV

0.00

0.05

0.10

0.15

0.20

0.25

0.30

0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9

10

-20

keV

/4-1

0k

eV

4-10keV/2-4keV

Cyg X-2 Color Color Diagram(1day)

10-20keV/4-10

keV

4U1630-472(BHC)

0.5

1

1.5

2

2.5

3

0 0.2 0.4 0.6 0.8 1

4-10 keV/2-4 keV

2-20 keV(c/s/cm2)

4U1630-472 Hardness-Intensity Diagram(1day)

1st_peak_5

5190-55250

2nd_peak_

55290-55350

0.0

0.2

0.4

0.6

0.8

1.0

0.50 1.00 1.50 2.00 2.50 3.00

10-20keV/4-10keV

4-10keV/2-4keV

4U1630-472 Color Color Diagram(1day)

1st_peak_5

5190-55250

2nd_peak_

55290-55350

1st

peak

2nd

peak

AqlX-1(Neutron Star)

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

1.60

1.80

2.00

0.00 0.20 0.40 0.60 0.80 1.00

4-1

0 k

eV

/2-4

keV

2-20 keV(c/s/cm2)

Aql X-1 Hardness-Intensity Diagram(1day)

1s_55140-

55175

2nd_55440

-55485

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

1.60

1.80

2.00

0.00 0.50 1.00 1.50 2.00

10

-20

keV

/4-1

0k

eV

4-10keV/2-4keV

Aql X-1 Color Color Diagram(1day)

1s_55140-

55175

2nd_55440-

55485

1st

peak

2nd

peak

GX339(BHC)

0

0.5

1

1.5

2

2.5

3

0 0.2 0.4 0.6 0.8 1 1.2 1.4 1.6 1.8 2

4-1

0 k

eV

/2-4

keV

2-20 keV(c/s/cm2)

GX339 Hardness-Intensity Diagram(1orbit)

4-10 keV/2-4 keV

Very High

0.0

0.5

1.0

1.5

2.0

2.5

3.0

0.0 0.5 1.0 1.5 2.0 2.5 3.0

10

-20

keV

/4-1

0k

eV

4-10keV/2-4keV

GX339 Color Color Diagram(1orbit)

4-10 keV/2-4 keV

Very High?

Peak Very high

Cyg X-1(BHC)

0.40

0.60

0.80

1.00

1.20

1.40

1.00 2.00 3.00 4.00 5.00

4-1

0 k

eV

/2-4

keV

2-20 keV(c/s/cm2)

Cyg X-1 Hardness-Intensity Diagram(1day)

55360-

55460

0.10

0.15

0.20

0.25

0.30

0.35

0.40

0.45

0.30 0.80 1.30 1.80

10

-20

keV

/4-1

0k

eV

4-10keV/2-4keV

Cyg X-1 Color Color Diagram(1day)

55360-

55460

Peak

H1743-322(BHC)

1st peak 2nd

peak

0

0.5

1

1.5

2

2.5

3

3.5

4

4.5

5

0 0.1 0.2 0.3 0.4 0.5 0.6

4-1

0 k

eV

/2-4

keV

2-20 keV(c/s/cm2)

H 1743-322 Hardness-Intensity Diagram(1orbit)

1st 55180-55250

2nd 55410-55485

0.0

0.5

1.0

1.5

2.0

2.5

3.0

0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0

10

-20

keV

/4-1

0k

eV

4-10keV/2-4keV

H 1743-322 Color Color Diagram(1orbit)

1st 55180-55250

2nd 55410-55485

4U1608-62(Neutron Star)

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

1.60

1.80

2.00

0.00 0.50 1.00 1.50

4-1

0 k

eV

/2-4

keV

2-20 keV(c/s/cm2)

4U1608-52 Hardness-Intensity Diagram(1day)

55250-

55295

0.00

0.20

0.40

0.60

0.80

1.00

1.20

1.40

1.60

1.80

2.00

0.00 0.50 1.00 1.50 2.00

10

-20

keV

/4-1

0k

eV

4-10keV/2-4keV

4U1608-52 Color Color Diagram(1orbit)

55250-

55295

Peak

A B

C DF

D H