MAXIGSC7YR Catalog
This table combines the published X-ray source catalogs of the high galactic
latitude (|b| > 10o), Kawamuro et 2018, and the low galactic latitude (|b|
< 10o), Hori et al. 2018, based on 7 years of MAXI Gas Slit Camera (GSC)
data from 2009 August 13 to 2016 July 31.
The low galactic latitude catalog contains 221 sources with a significance
threshold > 6.5 sigma. The low galactic faintest source has a flux of 5.2 x
10-12 erg cm-2 s-1 (or an intensity of 0.43 mCrab) in the 4-10 keV
band. The high galactic latitude catalog contains 686 sources detected at
significances >= 6.5 sigma in the 4-10 keV band. The high galactic 4-10 keV
sensitivity reaches ~0.48 mCrab, or ~5.9 x 10-12 erg cm-2 s-1, over
half of the survey area. The same data-screening criteria were applied to
obtain the low and high galactic catalogs.
In their papers the authors describe the detection method, the statistical
quantities derived for each source and their variability. To derive a
counterpart, each source was cross-matched with the Swift/BAT 105-month
catalog (BAT105; Oh et al. 2018), the Uhuru fourth catalog (4U; Forman et al.
1978), the RXTE All-Sky Monitor long-term observed source table
(XTEASMLONG16), Meta-Catalog of X-Ray Detected Clusters of Galaxies (MCXC;
Piffaretti et al. 2011), the XMM-Newton Slew Survey Catalog (XMMSL217), and
the ROSAT All-Sky Survey Bright Source Catalog (1RXS; Voges et al. 1999).
Seven of the sources in the low galactic latitudes were detected by binning
the data differently (source numbers 215-221 in the catalog named 73-day
sources), and, similarly, four of the sources in the high galactic latitude
catalog named transient sources.
The parameters in the combined table include the source name (3MAXI), the
position and its error, the detection significances and fluxes in the 4-10
keV, 3-4 keV bands and 10-20 keV bands the hardness ratios (HR1: 3-4 keV,
4-10 keV and HR2: 4-10 keV, 10-20 keV), excess variance in the 4-10 keV
lightcurve and information on the likely counterpart. The high galactic
catalogs also reports the flux in the 3-10 keV, an additional hardness
(HR3: 3-10 keV and 10-20 keV) and an additional parameter representing
variability. The hardness ratios are defined as H-S/H+S were S and H are the
soft- and hard-band fluxes, respectively.
MAXIGSCHGL Catalog
This table contains the catalog of high Galactic-latitude (|b| > 10o) X-ray
sources detected in the first 37 months of data accumulation of the Monitor
of All-sky X-ray Image/Gas Slit Camera (MAXI/GSC). To achieve the best
sensitivity, the authors developed a background model of the GSC that well
reproduced the data based on the detailed on-board calibration. Source
detection was performed through image fits with a Poisson likelihood
algorithm. The catalog contains 500 objects detected with significances >= 7
in the 4-10 keV band. The limiting sensitivity is ~7.5 x 10-12 erg cm-2
s-1 ( ~0.6 mCrab) in the 4-10 KeV band for 50% of the survey area, which is
the highest ever achieved in an all-sky survey mission covering this energy
band. In their paper, the authors summarize the statistical properties of the
catalog and results from cross-matching with the Swift/BAT 70-month catalog
(BAT70), the meta-catalog of X-ray detected clusters of galaxies (MCXC), and
the MAXI/GSC 7-month catalog (GSC7). This catalog lists the source name
(2MAXI), the position and its error, the detection significances and fluxes
in the 4-10 keV and 3-4 keV bands, the hardness ratio, and the basic
information on the likely counterpart (the latter available for 296 of the
sources).
MAXIMASTER Catalog
The MAXIMASTER database table records high-level information of the Monitor
of All-sky X-ray Image (MAXI) observations and provides access to the data
archive. MAXI is a Japanese experiment located at the International Space
Station (ISS), designed to continuously monitor, through a systematic survey,
X-ray sources as the ISS orbits Earth. MAXI was launched by
the space shuttle Endeavour on 2009 July 16, then mounted on port No. 1 on
JEM-EF on July 24. After the electric power was turned on, MAXI started
nominal observations on 2009 August 3.
MAXISSCCAT Catalog
This table contains the first source catalog of the Solid-state Slit Camera
(SSC) of the Monitor of All-sky X-ray Image (MAXI) mission located on the
International Space Station, using the 45 months of data from 2010 August 1
to 2014 April 30 in the 0.7-7.0 keV band. Sources were searched for in two
energy bands, 0.7-1.85 keV (the soft band) and 1.85-7.0 keV (the hard band),
limiting sensitivities of 3 and 4 mCrab, respectively, were achieved, and 140
and 138 sources were detected in the soft and hard energy bands,
respectively. Combining the two energy bands, 170 sources are listed in the
MAXI/SSC catalog. All but 2 sources are identified, with 22 galaxies
(including AGNs), 29 cluster of galaxies, 21 supernova remnants, 75 X-ray
binaries, 8 stars, 5 isolated pulsars, and 9 non-categorized objects.
Comparing the soft-band fluxes at the brightest end in this catalog with the
ROSAT survey, which was performed about 20 years ago, 10% of the catalogued
sources are found to have changed flux since the ROSAT era.
