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Table: ls_dr9.bricks_n
(The bold columns are indexed columns)
Column NameDescriptionDatatype
areaArea of the brick in square degreesDOUBLE
brickidA unique integer with 1-to-1 mapping to bricknameINTEGER
bricknameName of the bricktext
cosky_gEstimated sky level in the coadded images (stacks) in g-bandREAL
cosky_rEstimated sky level in the coadded images (stacks) in r-bandREAL
cosky_zEstimated sky level in the coadded images (stacks) in z-bandREAL
decDec of the center of the brickDOUBLE
dec1Lower Dec boundaryDOUBLE
dec2Upper Dec boundaryDOUBLE
ebvMedian SFD98 dust map E(B-V) extinction, in magnitudes, evaluated at BRICK_PRIMARY objects in this brickREAL
ext_gExtinction in g-bandREAL
ext_rExtinction in r-bandREAL
ext_w1Extinction in W1-bandREAL
ext_w2Extinction in W2-bandREAL
ext_w3Extinction in W3-bandREAL
ext_w4Extinction in W4-bandREAL
ext_zExtinction in z-bandREAL
galdepth_g5-sigma galaxy (0.45arcs round exp) detection depth in g-band (AB) magREAL
galdepth_r5-sigma galaxy (0.45arcs round exp) detection depth in r-band (AB) magREAL
galdepth_z5-sigma galaxy (0.45arcs round exp) detection depth in z-band (AB) magREAL
in_desiTrue if the brick is in the DESI footprintSMALLINT
ncompTotal number of BRICK_PRIMARY objects in this brick, of type COMP (there should be 0 such objects)INTEGER
ndevTotal number of BRICK_PRIMARY objects in this brick, of type DEVINTEGER
ndupTotal number of BRICK_PRIMARY objects in this brick, of type DUPINTEGER
nexpTotal number of BRICK_PRIMARY objects in this brick, of type EXPINTEGER
nexp_gMedian number of exposures in the unique area (i.e. BRICK_PRIMARY area) of the brick in g-bandSMALLINT
nexp_rMedian number of exposures in the unique area of the brick in r-bandSMALLINT
nexp_zMedian number of exposures in the unique area of the brick in z-bandSMALLINT
nexphist_g_1Histogram of number of pixels in the unique brick area with 0 exposures in gINTEGER
nexphist_g_2Histogram of number of pixels in the unique brick area with 1 exposures in gINTEGER
nexphist_g_3Histogram of number of pixels in the unique brick area with 2 exposures in gINTEGER
nexphist_g_4Histogram of number of pixels in the unique brick area with 3 exposures in gINTEGER
nexphist_g_5Histogram of number of pixels in the unique brick area with 4 exposures in gINTEGER
nexphist_g_6Histogram of number of pixels in the unique brick area with > 5 exposures in gINTEGER
nexphist_r_1Histogram of number of pixels in the unique brick area with 0 exposures in rINTEGER
nexphist_r_2Histogram of number of pixels in the unique brick area with 1 exposures in rINTEGER
nexphist_r_3Histogram of number of pixels in the unique brick area with 2 exposures in rINTEGER
nexphist_r_4Histogram of number of pixels in the unique brick area with 3 exposures in rINTEGER
nexphist_r_5Histogram of number of pixels in the unique brick area with 4 exposures in rINTEGER
nexphist_r_6Histogram of number of pixels in the unique brick area with > 5 exposures in rINTEGER
nexphist_z_1Histogram of number of pixels in the unique brick area with 0 exposures in zINTEGER
nexphist_z_2Histogram of number of pixels in the unique brick area with 1 exposures in zINTEGER
nexphist_z_3Histogram of number of pixels in the unique brick area with 2 exposures in zINTEGER
nexphist_z_4Histogram of number of pixels in the unique brick area with 3 exposures in zINTEGER
nexphist_z_5Histogram of number of pixels in the unique brick area with 4 exposures in zINTEGER
nexphist_z_6Histogram of number of pixels in the unique brick area with > 5 exposures in zINTEGER
nobjsTotal number of BRICK_PRIMARY objects in this brick, of all typesINTEGER
npsfTotal number of BRICK_PRIMARY objects in this brick, of type PSFINTEGER
nrexTotal number of BRICK_PRIMARY objects in this brick, of type REXINTEGER
nserTotal number of BRICK_PRIMARY objects in this brick, of type SERINTEGER
nsimpTotal number of BRICK_PRIMARY objects in this brick, of type SIMP (there should be 0 such objects)INTEGER
psfdepth_g5-sigma PSF detection depth in g-band (AB mag), using PsfEx PSF modelREAL
psfdepth_r5-sigma PSF detection depth in r-band (AB mag), using PsfEx PSF modelREAL
psfdepth_z5-sigma PSF detection depth in z-band (AB mag), using PsfEx PSF modelREAL
psfsize_gMedian PSF size, in arcsec, evaluated at the BRICK_PRIMARY objects in this brick in g-bandREAL
psfsize_rMedian PSF size, in arcsec, evaluated at the BRICK_PRIMARY objects in this brick in r-bandREAL
psfsize_zMedian PSF size, in arcsec, evaluated at the BRICK_PRIMARY objects in this brick in z-bandREAL
raRA of the center of the brickDOUBLE
ra1Lower RA boundaryDOUBLE
ra2Upper RA boundaryDOUBLE
survey_primaryTrue for northern (southern) bricks that lie in the northern (southern) region of the Legacy SurveysSMALLINT
trans_gMedian Milky Way dust transparency in g-band, based on ebv. See also MW_TRANSMISSION_GREAL
trans_rMedian Milky Way dust transparency in r-band, based on ebv. See also MW_TRANSMISSION_GREAL
trans_wise_1Median Milky Way dust transparency in W1, based on ebv. See also, e.g., MW_TRANSMISSION_W1REAL
trans_wise_2Median Milky Way dust transparency in W2, based on ebv. See also, e.g., MW_TRANSMISSION_W1REAL
trans_wise_3Median Milky Way dust transparency in W3, based on ebv. See also, e.g., MW_TRANSMISSION_W1REAL
trans_wise_4Median Milky Way dust transparency in W4, based on ebv. See also, e.g., MW_TRANSMISSION_W1REAL
trans_zMedian Milky Way dust transparency in z-band, based on ebv. See also MW_TRANSMISSION_GREAL
wise_nobs_1Number of images that contributed to WISE calculations in W1 (not profile-weighted)SMALLINT
wise_nobs_2Number of images that contributed to WISE calculations in W2 (not profile-weighted)SMALLINT
wise_nobs_3Number of images that contributed to WISE calculations in W3 (not profile-weighted)SMALLINT
wise_nobs_4Number of images that contributed to WISE calculations in W4 (not profile-weighted)SMALLINT