The All-sky X-ray maps made by Nakahira et al. (2020), accumulated from the Solid-state Slit Camera (SSC) on board the MAXI mission for 2 years from 2009 to 2011. They are the first ones that were derived with a solid-state instrument.

Pseudo-Color All-Sky Map by the SSC

In this map, blue, green, and red represent X-ray brightness within the energy bands of 2.0−4.0 keV, 1.0−2.0 keV, and 0.7−1.0 keV, respectively. Images are processed using the contbin method.

FitsDATA Formats

Data is provided in FITS format as follows.

• Primary Header
  Binary image in Aitoff-Hammer projection using Galactic coordinates, with units of counts deg$^{-2}$ cm$^{-2} sec,${^-1}.

• Secondary Header
  HEALpix image data array in Equatorial coordinates, using NESTED ordering and an NSIDE of 128. The RATE and ERROR columns indicate the X-ray intensity of emissions, also in counts deg$^{-2}$ cm$^{-2} sec,${^-1}, $respectively.

Request for using this data

MAXI users are courteously requested to acknowledge in any resulting publications, as follows:

“This research has made use of MAXI data provided by RIKEN, JAXA and the MAXI team.”

and to cite the paper:

“The MAXI Mission on the ISS: Science and Instruments for Monitoring All-Sky X-Ray Images”, Matsuoka, M. et al., PASJ, 61, 999 (2009) [doi:10.1093/pasj/61.5.999]

“MAXI/SSC All-sky maps from 0.7 keV to 4 keV”, Nakahira, S. et al., PASJ, Volume 72, Issue 2, id.17 (2020) [doi:10.1093/pasj/psz139]

MAXI team does not guarantee any results obtained from using the MAXI data and tools. When you change MAXI tools, please indicate that changes are made.