The First MAXI/GSC Catalog in the High Galactic-Latitude Sky

Abstract

We present the first unbiased source catalog of the Monitor of All-sky X-ray Image (MAXI) mission at high Galactic latitudes ($|b|>10^{\circ }$), produced from the first 7-month data (2009 September 1 to 2010 March 31) of the Gas Slit Camera in the 4--10 keV band. We develop an analysis procedure to detect faint sources from the MAXI data, utilizing a maximum likelihood image fitting method, where the image response, background, and detailed observational conditions are taken into account. The catalog consists of 143 X-ray sources above 7 sigma significance level with a limiting sensitivity of $\sim 1.5\times 10^{-11}$ ergs cm${}^{-2}$ s${}^{-1}$ (1.2 mCrab) in the 4--10 keV band. Among them, we identify 38 Galactic/LMC/SMC objects, 48 galaxy clusters, 39 Seyfert galaxies, 12 blazars, and 1 galaxy. Other 4 sources are confused with multiple objects, and one remains unidentified. The log $N$ - log $S$ relation of extragalactic objects is in a good agreement with the HEAO-1 A-2 result, although the list of the brightest AGNs in the entire sky has significantly changed since that in 30 years ago.

14 pages, including 10 figures and 3 tables, PASJ accepted

References in corpus (11)

• The 3rd IBIS/ISGRI soft gamma-ray survey catalog
• The first XMM-Newton slew survey catalogue: XMMSL1
• Swift BAT Survey of AGN
• Gas Slit Camera (GSC) onboard MAXI on ISS
• INTEGRAL/IBIS all-sky survey in hard X-rays
• In-Orbit Performance of MAXI Gas Slit Camera (GSC) on ISS
• Solid-state Slit Camera (SSC) on Board MAXI
• Spectral Statistics and Local Luminosity Function of a Hard X-ray Complete Sample of Brightest AGNs
• Bright X-ray flares from the BL Lac object Mrk 421, detected with MAXI in 2010 January and February
• In Orbit Performance of the MAXI/SSC onboard the ISS
• Revisit of Local X-ray Luminosity Function of Active Galactic Nuclei with the MAXI Extragalactic Survey

Cited by in corpus (19)

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• The Swift/BAT Hard X-ray Transient Monitor
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• The 5 - 10 keV AGN luminosity function at 0.01<z<4.0
• MAXI investigation into the longterm X-ray variability from the very-high-energy gamma-ray blazar Mrk 421
• Revisit of Local X-ray Luminosity Function of Active Galactic Nuclei with the MAXI Extragalactic Survey
• The 37-month MAXI/GSC source catalog in the high Galactic-latitude sky
• Extraordinary luminous soft X-ray transient MAXI J0158-744 as an ignition of a nova on a very massive O-Ne white dwarf
• The 7-year MAXI/GSC X-ray Source Catalog in the High Galactic-Latitude Sky (3MAXI)
• Spectral Evolution of a New X-ray Transient MAXI J0556-332 Observed by MAXI, Swift, and RXTE
• Hard X-ray Luminosity Function of Tidal Disruption Events: First Results from MAXI Extragalactic Survey
• A Large X-ray Flare from a Single Weak-lined T Tauri Star TWA-7 Detected with MAXI GSC
• Investigating the evolution of the dual AGN system ESO~509-IG066
• The First MAXI/SSC Catalog of X-ray Sources in 0.7--7.0~keV
• A Soft X-Ray Lag Detected in Centaurus A
• Monitoring the Extragalactic High Energy Sky
• X-ray and infrared diagnostics of nearby active galactic nuclei with MAXI and AKARI
• Search for neutrino doublets and triplets using 11.4 years of IceCube data
• Swift/BAT and MAXI/GSC Broadband Transient Monitor