“DESI”的版本间差异

2023年7月8日 (六) 04:09的最新版本

https://github.com/EigenHermit/get_stamp_desi_ls/ 在DESI里面切大图的程序，输入RA，DEC和boxsize从DESI的图像数据库里面切出fits file

(i) luminous red galaxies (LRGs) in the redshift range z = 0.3 to z = 1
(ii) emission line galaxies (ELGs) to z = 1.7
(iii) quasars to higher redshifts (2.1 < z < 3.5)
(iv) a magnitude-limited Bright Galaxy Survey out to z~0.6 with a median redshift of z~0.2

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 http://desi.lbl.gov/
+==辅助数据==
+*https://github.com/EigenHermit/get_stamp_desi_ls/ 在DESI里面切大图的程序，输入RA，DEC和boxsize从DESI的图像数据库里面切出fits file
+==图像巡天==
-previously BigBOSS
+*  The Beijing-Arizona Sky Survey (BASS)
+* The DECam Legacy Survey (DECaLS)
+* The Mayall z-band Legacy Survey (MzLS)
+* https://www.legacysurvey.org/
+* 14000平方度，g,r,z及WISE的四个波段
+==光谱巡天==
+* * 5000根光纤
+*  wavelength range 360 to 980 nm
+* spectral resolution of R = between 2000 and 5500
+* 天区覆盖：14000 deg2，总样本 30 million spectroscopic target
+* 四个子样本
+:* (i) luminous red galaxies (LRGs) in the redshift range z = 0.3 to z = 1
+:* (ii) emission line galaxies (ELGs) to z = 1.7
+:* (iii) quasars to higher redshifts (2.1 < z < 3.5)
+:* (iv) a magnitude-limited Bright Galaxy Survey out to z~0.6 with a median redshift of z~0.2
+===BGS===
+* 在bright observing time进行
+* a flux limited sample of around 10 million galaxies
+*  r<19.5 (800 galaxies/deg^2)
+* 19.5 < r < 20  (a secondary sample, 600 galaxies/deg^2)