* Overview [#o8a20b13]
''MOIRCS Deep Survey (MODS)'' is a deep near-infrared (NIR) imaging survey with 
Multi-Object Infrared Camera and Spectrograph (MOIRCS)  mounted 
on the Subaru telescope. Total integration time of ~124 hours were 
spent in the JHKs-bands imaging observations in the GOODS-North region.  
The MODS data reach 5sigma depth of J=24.2, H=23.1, and Ks=23.1 
(Vega magnitude, 2xPSF FWHM diameter aperture) over 103 arcmin^2, and J=25.1, H=23.7, Ks=24.1 in 
28 arcmin^2 of the survey area. These are one of the deepest NIR 
(especially in K band) images obtained to date. 
(especially in Ks band) images obtained to date. 
NIR data are essential for measuring the stellar mass of galaxies at z<3 and 
studying the stellar population of galaxies at 1<z<4 through the Balmer/4000A break. 
Combined with very deep HST and Spitzer data of the GOODS legacy survey,  
the MODS data enable us to reveal the stellar mass assembly history of galaxies 
at 1<z<4, when most of stars seen in the present universe are expected to 
have been formed.  The very deep and high-quality NIR data are also essential for 
searching galaxies at z>7 and are very useful for identifying sources found by  
extensive multi-wavelength surveys in this region with Chandra, Herschel, 
SCUBA, MAMBO, AzTEC, VLA, and so on.




* Field layout [#s0a5582e]

- 4 pointings of MOIRCS cover a field of ~105 (7 x 15) arcmin^2 
of the GOODS-North region.
(referred to as GT-1 to GT-4 field). 
The GT-2 field is the ultra-deep field of the MODS, where the total integration times are longer 
than the other fields.

&ref(./MODS_JHKfigure2.jpeg,45%);