X-ray Binaries MAXI CCIs

This project has been supported in part by grants from the Smithsonian Institution Endowment program.

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The majority of the images are made using MAXI/GSC data.

The first twelve images show 12 individual sources in each of four color ratios plotted in 3-dimensions were the axes are hard color (HC), soft color (SC) and relative intensity (RelInt). The sources are two black holes with high mass companions (Cyg X-1 and LMC X-1); two black hole systems with low mass companions (GX339-4 and GRS1915+105); two non-pulsing neutron star Z sources (Cyg X-2 and GX17+2); two non-pulsing neutron star Atoll sources (GX9+9 and GX9+1); two pulsars with high mass companions (Cen X-3 and Vela X-1) and two pulsars with low mass companions (4U1822-37 and 4U1626-67). In red are depicted color ratios corresponding to the closest MAXI can come to the RXTE/ASM (HC=(5-12 kev)/(2-3keV); SC=(3-5keV)/(2-3keV); in blue are color ratios as close to that used for the Chandra/HETG (HC=(5-8 kev)/(2-3keV); SC=(3-5keV)/(2-3keV); in Magenta color ratios corresponding to Homan et al (2010) and in green color ratios corresponding to Peris et al (2016).

The next 60 images show each combination of types pairwise for each of the four color ratios (in the order ASM, Chandra, Homan, Peris). For these images black hole systems with low-mass companions are in green; black hole systems with high-mass companions in black; non-pulsing neutron star system Z sources in blue; non-pulsing neutron star Atoll sources in magenta, pulsing neutron star systems with high mass companions in red; pulsing neutron star systems with low mass companions in yellow.

The final six images show all sources in the colors above using: 1) actual RXTE/ASM data; 2) MAXI data with ASM ratios; 3) actual Chandra/HETG data; 4) MAXI data with Chandra ratios; 5) MAXI data with Homan ratios; and 6) MAXI data with Peris ratios.

Updated February 1 2018.

Updated February 1th,  2018.