II/357 The Dark Energy Survey (DES): Data Release 1 (Abbott+, 2018)
The Dark Energy Survey: Data Release 1.
Abbott T.M.C., Abdalla F.B., Allam S., Amara A., Annis J., Asorey J.,
Avila S., Ballester O., Banerji M., Barkhouse W., Baruah L., Baumer M.,
Bechtol K., Becker M.R., Benoit-Levy A., Bernstein G.M., Bertin E.,
Blazek J., Bocquet S., Brooks D., Brout D., Buckley-Geer E., Burke D.L.,
Busti V., Campisano R., Cardiel-Sas L., Rosell A.C., Kind M.C.,
Carretero J., Castander F.J., Cawthon R., Chang C., Chen X., Conselice C.,
Costa G., Crocce M., Cunha C.E., D'Andrea C.B., da Costa L.N., Das R.,
Daues G., Davis T.M., Davis C., De Vicente J., DePoy D.L., DeRose J.,
Desai S., Diehl H.T., Dietrich J.P., Dodelson S., Doel P., Drlica-Wagner A.,
Eifler T.F., Elliott A.E., Evrard A.E., Farahi A., Neto A.F., Fernandez E.,
Finley D.A., Flaugher B., Foley R.J., Fosalba P., Friedel D.N., Frieman J.,
Garcia-Bellido J., Gaztanaga E., Gerdes D.W., Giannantonio T., Gill M.S.S.,
Glazebrook K., Goldstein D.A., Gower M., Gruen D., Gruendl R.A.,
Gschwend J., Gupta R.R., Gutierrez G., Hamilton S., Hartley W.G.,
Hinton S.R., Hislop J.M., Hollowood D., Honscheid K., Hoyle B., Huterer D.,
Jain B., James D.J., Jeltema T., Johnson M.W.G., Johnson M.D., Kacprzak T.,
Kent S., Khullar G., Klein M., Kovacs A., Koziol A.M.G., Krause E.,
Kremin A., Kron R., Kuehn K., Kuhlmann S., Kuropatkin N., Lahav O.,
Lasker J., Li T.S., Li R.T., Liddle A.R., Lima M., Lin H., Lopez-Reyes P.,
MacCrann N., Maia M.A.G., Maloney J.D., Manera M., March M., Marriner J.,
Marshall J.L., Martini P., McClintock T., McKay T., McMahon R.G.,
Melchior P., Menanteau F., Miller C.J., Miquel R., Mohr J.J., Morganson E.,
Mould J., Neilsen E., Nichol R.C., Nogueira F., Nord B., Nugent P.,
Nunes L., Ogando R.L.C., Old L., Pace A.B., Palmese A., Paz-Chinchon F.,
Peiris H.V., Percival W.J., Petravick D., Plazas A.A., Poh J., Pond C.,
Porredon A., Pujol A., Refregier A., Reil K., Ricker P.M., Rollins R.P.,
Romer A.K., Roodman A., Rooney P., Ross A.J., Rykoff E.S., Sako M.,
Sanchez M.L., Sanchez E., Santiago B., Saro A., Scarpine V., Scolnic D.,
Serrano S., Sevilla-Noarbe I., Sheldon E., Shipp N., Silveira M.L.,
Smith M., Smith R.C., Smith J.A., Soares-Santos M., Sobreira F., Song J.,
Stebbins A., Suchyta E., Sullivan M., Swanson M.E.C., Tarle G., Thaler J.,
Thomas D., Thomas R.C., Troxel M.A., Tucker D.L., Vikram V., Vivas A.K.,
Walker A.R., Wechsler R.H., Weller J., Wester W., Wolf R.C., Wu H.,
Yanny B., Zenteno A., Zhang Y., Zuntz J., Juneau S., Fitzpatrick M.,
Nikutta R., Nidever D., Olsen K., Scott A. (The NOAO Data Lab)
<Astrophys. J. Suppl., 239, 18 (2018)>
=2018ApJS..239...18A 2018ApJS..239...18A
ADC_Keywords: Surveys; Photometry, ugriz; Reddening
Keywords: astronomical databases: miscellaneous ; catalogs ;
cosmology: observations ; surveys ; techniques: image processing ;
techniques: photometric
Abstract:
We describe the first public data release of the Dark Energy Survey,
DES DR1, consisting of reduced single-epoch images, co-added images,
co-added source catalogs, and associated products and services
assembled over the first 3yr of DES science operations. DES DR1 is
based on optical/near-infrared imaging from 345 distinct nights (2013
August to 2016 February) by the Dark Energy Camera (DECam) mounted on
the 4m Blanco telescope at the Cerro Tololo Inter-American Observatory
in Chile. We release data from the DES wide-area survey covering
∼5000deg2 of the southern Galactic cap in five broad photometric
bands, grizY. DES DR1 has a median delivered point-spread function of
g=1.12, r=0.96, i=0.88, z=0.84, and Y=0.90" FWHM, a photometric
precision of <1% in all bands, and an astrometric precision of 151mas.
The median co-added catalog depth for a 1.95" diameter aperture at
signal-to-noise ratio (S/N)=10 is g=24.33, r=24.08, i=23.44, z=22.69,
and Y=21.44mag. DES DR1 includes nearly 400 million distinct
astronomical objects detected in ∼10000 co-add tiles of size
0.534deg2 produced from ∼39000 individual exposures. Benchmark
galaxy and stellar samples contain ∼310 million and ∼80 million
objects, respectively, following a basic object quality selection. DES
DR1 constitutes the largest photometric data set to date at the
achieved depth and photometric precision.
Acknowledging the Dark Energy Survey (DES) in publications:
This project used public archival data from the Dark Energy Survey
(DES). Funding for the DES Projects has been provided by the U.S.
Department of Energy, the U.S. National Science Foundation, the
Ministry of Science and Education of Spain, the Science and Technology
Facilities Council of the United Kingdom, the Higher Education Funding
Council for England, the National Center for Supercomputing
Applications at the University of Illinois at Urbana-Champaign, the
Kavli Institute of Cosmological Physics at the University of Chicago,
the Center for Cosmology and Astro-Particle Physics at the Ohio State
University, the Mitchell Institute for Fundamental Physics and
Astronomy at Texas A&M University, Financiadora de Estudos e Projetos,
Fundacao Carlos Chagas Filho de Amparo a Pesquisa do Estado do Rio de
Janeiro, Conselho Nacional de Desenvolvimento Cientifico e Tecnologico
and the Ministerio da Ciencia, Tecnologia e Inovacao, the Deutsche
Forschungsgemeinschaft and the Collaborating Institutions in the Dark
Energy Survey.
The Collaborating Institutions are Argonne National Laboratory, the
University of California at Santa Cruz, the University of Cambridge,
Centro de Investigaciones Energeticas, Medioambientales y
Tecnologicas-Madrid, the University of Chicago, University College
London, the DES-Brazil Consortium, the University of Edinburgh, the
Eidgenossische Technische Hochschule (ETH) Zurich, Fermi National
Accelerator Laboratory, the University of Illinois at
Urbana-Champaign, the Institut de Ciencies de l'Espai (IEEC/CSIC), the
Institut de Fisica d'Altes Energies, Lawrence Berkeley National
Laboratory, the Ludwig-Maximilians Universitat Munchen and the
associated Excellence Cluster Universe, the University of Michigan,
the National Optical Astronomy Observatory, the University of
Nottingham, The Ohio State University, the OzDES Membership
Consortium, the University of Pennsylvania, the University of
Portsmouth, SLAC National Accelerator Laboratory, Stanford University,
the University of Sussex, and Texas A&M University.
Based in part on observations at Cerro Tololo Inter-American
Observatory, National Optical Astronomy Observatory, which is operated
by the Association of Universities for Research in Astronomy (AURA)
under a cooperative agreement with the National Science Foundation.
See http://des.ncsa.illinois.edu/thanks for the TeX version.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
des_dr1.sam 1816 1000 *Sample of the Dark Energy Survey (DES) DR1
main catalog (1000 among 399,263,026 sources)
--------------------------------------------------------------------------------
Note on des_dr1.sam: The DES griz filters are similar but not identical to the
SDSS griz filter. Transformation equations may be used to convert
objects within restricted color ranges between the two filter systems.
See: http://des.ncsa.illinois.edu/releases/dr1/dr1-faq
--------------------------------------------------------------------------------
See also:
J/A+A/523/A48 : Gaia photometry (Jordi+, 2010)
J/ApJ/757/83 : The Blanco Cosmology Survey (BCS) (Desai+, 2012)
J/AJ/153/107 : Australian Dark Energy Survey (OzDES) quasar catalog
(Tie+, 2017)
J/MNRAS/472/273 : OzDES DR1 (Childress+, 2017)
http://des.ncsa.illinois.edu/releases/dr1 : DES DR1 release home page
Byte-by-byte Description of output: des_dr1.sam
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 F13.9 deg RAdeg Right ascension, with quantized precision
for indexing (J2000) (RA)
15- 27 F13.9 deg DEdeg [-68.2/6.1] Declination, with quantized
precision for indexing (J2000) (DEC)
29- 47 A19 --- DES Identifier based on IAU format; column added
by CDS (JHHMMSS.ss+DDMMSS.s)
49- 57 I9 --- CoadID [61407265/618668848] Unique identifier for
the co-added objects (COADDOBJECTID)
59- 70 A12 --- Tile Identifier of each one of the tiles on which
the survey is gridded (DESHHMM+DDMM)
(TILENAME)
72- 84 F13.9 deg RAFdeg Right ascension for the object, J2000
in ICRS system (full precision but not
indexed) (ALPHAWIN_J2000)
86- 98 F13.9 deg DEFdeg Declination for the object, J2000
in ICRS system (full precision)
(DELTAWIN_J2000)
100- 112 F13.9 deg GLON Galactic longitude (GALACTIC_L)
114- 126 F13.9 deg GLAT [-90/-20.7] Galactic latitude (GALACTIC_B)
128- 132 I5 --- Hpix32 Healpix identifier for its NSIDE grid size,
in a NESTED schema (HPIX_32)
134- 138 I5 --- Hpix64 Healpix identifier for its NSIDE grid size,
in a NESTED schema (HPIX_64)
140- 147 I8 --- Hpix1024 Healpix identifier for its NSIDE grid size,
in a NESTED schema (HPIX_1024)
149- 157 I9 --- Hpix4096 Healpix identifier for its NSIDE grid size,
in a NESTED schema (HPIX_4096)
159- 168 I10 --- Hpix16384 Healpix identifier for its NSIDE grid size,
in a NESTED schema (HPIX_16384)
170- 171 I2 --- Ngep [0/17] Number of epochs the source is
detected in single epoch g-band images
(NEPOCHS_G)
173- 174 I2 --- Nrep [0/17] Number of epochs the source is
detected in single epoch r-band images
(NEPOCHS_R)
176- 177 I2 --- Niep [0/37] Number of epochs the source is
detected in single epoch i-band images
(NEPOCHS_I)
179- 180 I2 --- Nzep [0/40] Number of epochs the source is
detected in single epoch z-band images
(NEPOCHS_Z)
182- 183 I2 --- NYep [0/20] Number of epochs the source is
detected in single epoch Y-band images
(NEPOCHS_Y)
185- 187 I3 --- Ng [-1/980] Number of iterations in model
fitting g-band photometric measurements
(NITERMODELG)
189- 192 I4 --- Nr [-1/1000] Number of iterations in model
fitting r-band photometric measurements
(NITERMODELR)
194- 196 I3 --- Ni [-1/857] Number of iterations in model
fitting i-band photometric measurements
(NITERMODELI)
198- 201 I4 --- Nz [-1/1000] Number of iterations in model
fitting z-band photometric measurements
(NITERMODELZ)
203- 205 I3 --- NY [-1/882] Number of iterations in model
fitting Y-band photometric measurements
(NITERMODELY)
207- 213 I7 pix2 gArea [0/1364707] Isophotal area of the coadded
source in g-band (ISOAREAIMAGEG)
215- 221 I7 pix2 rArea Isophotal area of the coadded source
in r-band (ISOAREAIMAGER)
223- 229 I7 pix2 iArea Isophotal area of the coadded source
in i-band (ISOAREAIMAGEI)
231- 237 I7 pix2 zArea Isophotal area of the coadded source
in z-band (ISOAREAIMAGEZ)
239- 244 I6 pix2 YArea [0/935163] Isophotal area of the coadded
source in Y-band (ISOAREAIMAGEY)
246- 253 F8.3 pix Aimg [0.4/1668] Major axis size based on an
isophotal model (A_IMAGE)
255- 259 F5.3 pix e_Aimg [0.001/8] Uncertainty in major axis size,
from isophotal model (ERRA_IMAGE)
261- 268 F8.3 pix amajg [0.2/1579] Major-axis size, from second-order
windowed moment measurements in g-band
(AWINIMAGEG)
270- 277 F8.3 pix amajr Major-axis size, from second-order
windowed moment measurements in r-band
(AWINIMAGER)
279- 286 F8.3 pix amaji Major-axis size, from second-order
windowed moment measurements in i-band
(AWINIMAGEI)
288- 295 F8.3 pix amajz Major-axis size, from second-order
windowed moment measurements in z-band
(AWINIMAGEZ)
297- 304 F8.3 pix amajY [0.2/1668] Major-axis size, from second-order
windowed moment measurements in Y-band
(AWINIMAGEY)
306- 312 F7.3 pix e_amajg [0/220] amajg uncertainty
(ERRAWINIMAGEG)
314- 320 F7.3 pix e_amajr amajr uncertainty (ERRAWINIMAGER)
322- 328 F7.3 pix e_amaji amaji uncertainty (ERRAWINIMAGEI)
330- 337 F8.3 pix e_amajz [0/2897] amajz uncertainty
(ERRAWINIMAGEZ)
339- 346 F8.3 pix e_amajY amajY uncertainty (ERRAWINIMAGEY)
348- 354 F7.3 pix Bimg [0.1/411] Minor axis size based on an
isophotal model (B_IMAGE)
356- 360 F5.3 pix e_Bimg [0/0.9] Uncertainty in minor axis size, from
isophotal model (ERRB_IMAGE)
362- 368 F7.3 pix bming [0.01/411] Minor-axis size, from second-order
windowed moment measurements in g-band
(BWINIMAGEG)
370- 376 F7.3 pix bminr [0.02/411] Minor-axis size, from second-order
windowed moment measurements in r-band
(BWINIMAGER)
378- 384 F7.3 pix bmini [0.01/411] Minor-axis size, from second-order
windowed moment measurements in i-band
(BWINIMAGEI)
386- 392 F7.3 pix bminz [0.01/411] Minor-axis size, from second-order
windowed moment measurements in z-band
(BWINIMAGEZ)
394- 400 F7.3 pix bminY [0.01/411] Minor-axis size, from second-order
windowed moment measurements in Y-band
(BWINIMAGEY)
402- 408 F7.3 pix e_bming [0/143] bming uncertainty
(ERRBWINIMAGEG)
410- 416 F7.3 pix e_bminr bminr uncertainty (ERRBWINIMAGER)
418- 424 F7.3 pix e_bmini bmini uncertainty (ERRBWINIMAGEI)
426- 433 F8.3 pix e_bminz [0/2890] bminz uncertainty
(ERRBWINIMAGEZ)
435- 441 F7.3 pix e_bminY bminY uncertainty (ERRBWINIMAGEY)
443- 451 F9.5 deg PA [-90/90] Position angle of source in J2000
coordinates, from non-windowed measurement
(THETA_J2000)
453- 461 F9.5 deg e_PA [-90/90] Uncertainty in position angle from
isophotal model (ERRTHETA_IMAGE) (11)
463- 471 F9.5 deg PAg [-90/90] Position angle of source, for
converged windowed measurement grow
from x to y in g-band (THETAWINIMAGEG)
473- 481 F9.5 deg PAr [-90/90] Position angle of source, for
converged windowed measurement grow from
x to y in r-band (THETAWINIMAGER)
483- 491 F9.5 deg PAi [-90/90] Position angle of source, for
converged windowed measurement grow from
x to y in i-band (THETAWINIMAGEI)
493- 501 F9.5 deg PAz [-90/90] Position angle of source, for
converged windowed measurement grow from
x to y in z-band (THETAWINIMAGEZ)
503- 511 F9.5 deg PAY [-90/90] Position angle of source, for
converged windowed measurement grow from
x to y in Y-band (THETAWINIMAGEY)
513- 521 F9.5 deg e_PAg [-90/90] Uncertainty in source position angle
from converged windowed measurement
in g-band (ERRTHETAWINIMAGEG) (11)
523- 531 F9.5 deg e_PAr [-90/90] Uncertainty in source position angle
from converged windowed measurement
in r-band (ERRTHETAWINIMAGER) (11)
533- 541 F9.5 deg e_PAi [-90/90] Uncertainty in source position angle
from converged windowed measurement
in i-band (ERRTHETAWINIMAGEI) (11)
543- 551 F9.5 deg e_PAz [-90/90] Uncertainty in source position angle
from converged windowed measurement
in z-band (ERRTHETAWINIMAGEZ) (11)
553- 561 F9.5 deg e_PAY [-90/90] Uncertainty in source position angle
from converged windowed measurement
in Y-band (ERRTHETAWINIMAGEY) (11)
563- 571 F9.3 pix gFWHM [-1230/2253] g-band FWHM measured from the
isophotal area (FWHMIMAGEG) (5)
573- 580 F8.3 pix rFWHM [-325/2796] r-band FWHM measured from the
isophotal area (FWHMIMAGER) (5)
582- 589 F8.3 pix iFWHM [-659/2796] i-band FWHM measured from the
isophotal area (FWHMIMAGEI) (5)
591- 599 F9.3 pix zFWHM [-1740/2796] z-band FWHM measured from the
isophotal area (FWHMIMAGEZ) (5)
601- 609 F9.3 pix YFWHM [-1740/2796] Y-band FWHM measured from the
isophotal area (FWHMIMAGEY) (5)
611- 623 F13.3 pix gRe [-6E7/4576] Half-light g-band radius for the
object (FLUXRADIUSG) (5)
625- 636 F12.3 pix rRe [-3457255/5492] Half-light r-band radius for
the object (FLUXRADIUSR) (5)
638- 649 F12.3 pix iRe [-2633279/9851] Half-light i-band radius
for the object (FLUXRADIUSI) (5)
651- 663 F13.3 pix zRe [-1.8E7/9851] Half-light z-band radius for
the object (FLUXRADIUSZ) (5)
665- 678 F14.3 pix YRe [-1.1E8/2411] Half-light Y-band radius for
the object (FLUXRADIUSY) (5)
680- 685 F6.3 pix KRad [0/22] Kron radius measured from detection
image (KRON_RADIUS)
687- 692 F6.3 pix KRadg [0/22] Kron radius measured from coadded
image in g-band (KRONRADIUSG)
694- 699 F6.3 pix KRadr [0/22] Kron radius measured from coadded
image in r-band (KRONRADIUSR)
701- 706 F6.3 pix KRadi [0/22] Kron radius measured from coadded
image in i-band (KRONRADIUSI)
708- 713 F6.3 pix KRadz [0/22] Kron radius measured from coadded
image in z-band (KRONRADIUSZ)
715- 720 F6.3 pix KRadY [0/22] Kron radius measured from coadded
image in Y-band (KRONRADIUSY)
722- 726 F5.3 --- S/Gg [0/1] Extended source flag
(0=galaxy; 1=star) (CLASSSTARG)
728- 732 F5.3 --- S/Gr Extended source flag (0=galaxy; 1=star)
(CLASSSTARR)
734- 738 F5.3 --- S/Gi Extended source flag (0=galaxy; 1=star)
(CLASSSTARI)
740- 744 F5.3 --- S/Gz Extended source flag (0=galaxy; 1=star)
(CLASSSTARZ)
746- 750 F5.3 --- S/GY Extended source flag (0=galaxy; 1=star)
(CLASSSTARY)
752- 769 F18.3 --- Exg [-5.3E12/2E9] Morphology based classifier
in g-band (0=star; larger values=galaxy)
(SPREADMODELG) (7)
771- 786 F16.3 --- Exr [-3.2E10/3.8E8] Morphology based classifier
in r-band (0=star; larger values=galaxy)
(SPREADMODELR) (7)
788- 806 F19.3 --- Exi [-1.5E13/2.4E7] Morphology based classifier
in i-band (0=star; larger values=galaxy)
(SPREADMODELI) (7)
808- 826 F19.3 --- Exz [-1.2E13/1.3E12] Morphology based classifier
in z-band (0=star; larger values=galaxy)
(SPREADMODELZ) (7)
828- 847 F20.3 --- ExY [-4.4E14/3.2E12] Morphology based classifier
in Y-band (0=star; larger values=galaxy)
(SPREADMODELY) (7)
849- 866 F18.3 --- e_Exg [0/8E13] Exg uncertainty (SPREADERRMODELG)
868- 885 F18.3 --- e_Exr [0/2E13] Exr uncertainty (SPREADERRMODELR)
887- 904 F18.3 --- e_Exi [0/4E13] Exi uncertainty (SPREADERRMODELI)
906- 923 F18.3 --- e_Exz [0/4E13] Exz uncertainty (SPREADERRMODELZ)
925- 945 F21.3 --- e_ExY [0/9E16] ExY uncertainty (SPREADERRMODELY)
947- 952 F6.3 --- SModg [-0.6/1]?=- SPREAD MODEL using the weighted
averaged g-band values from single epoch
detections (WAVGSPREADMODEL_G) (8)
954- 959 F6.3 --- SModr ?=- SPREAD MODEL using the weighted averaged
r-band values from single epoch detections
(WAVGSPREADMODEL_R) (8)
961- 966 F6.3 --- SModi ?=- SPREAD MODEL using the weighted averaged
i-band values from single epoch detections
(WAVGSPREADMODEL_I) (8)
968- 973 F6.3 --- SModz ?=- SPREAD MODEL using the weighted averaged
z-band values from single epoch detections
(WAVGSPREADMODEL_Z) (8)
975- 980 F6.3 --- SModY [-0.07/1]?=- SPREAD MODEL using the
weighted averaged Y-band values from
single epoch detections
(WAVGSPREADMODEL_Y) (8)
982- 991 F10.3 --- e_SModg [0/380467]?=- SModg uncertainty
(WAVGSPREADERRMODEL_G) (10)
993-1003 F11.3 --- e_SModr [0/1475179]?=- SModr uncertainty
(WAVGSPREADERRMODEL_R) (10)
1005-1014 F10.3 --- e_SModi [0/150005]?=- SModi uncertainty
(WAVGSPREADERRMODEL_I)
1016-1021 F6.3 --- e_SModz [0/88]?=- SModz uncertainty
(WAVGSPREADERRMODEL_Z)
1023-1030 F8.3 --- e_SModY [0/3403]?=- SModY uncertainty
(WAVGSPREADERRMODEL_Y)
1032-1046 F15.4 --- gFlux [-3E8/3E9] g-band flux measurement, for an
elliptical model based on the Kron radius
in ADU units (FLUXAUTOG)
1048-1062 F15.4 --- rFlux [-2E8/2E9] r-band flux measurement, for an
elliptical model based on the Kron radius
in ADU units (FLUXAUTOR)
1064-1078 F15.4 --- iFlux [-7E8/10E9] i-band flux measurement, for an
elliptical model based on the Kron radius
in ADU units (FLUXAUTOI)
1080-1094 F15.4 --- zFlux [-2E8/2E9] z-band flux measurement, for an
elliptical model based on the Kron radius
in ADU units (FLUXAUTOZ)
1096-1110 F15.4 --- YFlux [-7E8/10E9] Y-band flux measurement, for an
elliptical model based on the Kron radius
in ADU units (FLUXAUTOY)
1112-1121 F10.4 --- e_gFlux [0/23661] gFlux uncertainty (FLUXERRAUTOG)
1123-1132 F10.4 --- e_rFlux [0/20785] rFlux uncertainty (FLUXERRAUTOR)
1134-1143 F10.4 --- e_iFlux [0/34496] iFlux uncertainty (FLUXERRAUTOI)
1145-1154 F10.4 --- e_zFlux [0/85414] zFlux uncertainty (FLUXERRAUTOZ)
1156-1166 F11.4 --- e_YFlux [0/200635] YFlux uncertainty (FLUXERRAUTOY)
1168-1199 F32.4 --- gFluxPSF [12/7E26]?=- Weighted averaged g-band flux,
of PSF fit single epoch detections in
ADU units (WAVGFLUXPSF_G)
1201-1229 F29.4 --- rFluxPSF [36/2E23]?=- Weighted averaged r-band flux,
of PSF fit single epoch detections in
ADU units (WAVGFLUXPSF_R)
1231-1263 F33.4 --- iFluxPSF ?=- Weighted averaged i-band flux, of PSF fit
single epoch detections in ADU units
(WAVGFLUXPSF_I)
1265-1293 F29.4 --- zFluxPSF ?=- Weighted averaged z-band flux, of PSF fit
single epoch detections in ADU units
(WAVGFLUXPSF_Z)
1295-1318 F24.4 --- YFluxPSF [323/6E18]?=- Weighted averaged Y-band flux,
of PSF fit single epoch detections in
ADU units (WAVGFLUXPSF_Y)
1320-1348 F29.4 --- e_gFluxPSF [11/2.6E23]?=- gFluxPSF uncertainty
(WAVGFLUXERRPSF_G)
1350-1375 F26.4 --- e_rFluxPSF [12/2.6E20]?=- rFluxPSF uncertainty
(WAVGFLUXERRPSF_R)
1377-1407 F31.4 --- e_iFluxPSF [17/1.3E25]?=- iFluxPSF uncertainty
(WAVGFLUXERRPSF_I)
1409-1433 F25.4 --- e_zFluxPSF [28/1.4E19]?=- zFluxPSF uncertainty
(WAVGFLUXERRPSF_Z)
1435-1455 F21.4 --- e_YFluxPSF [139/5.4E15]?=- YFluxPSF uncertainty
(WAVGFLUXERRPSF_Y)
1457-1463 F7.4 mag gmag [6.4/33]?=- g-band (AB) magnitude estimation
(MAGAUTOG) (6)
1465-1471 F7.4 mag rmag [6.8/33]?=- r-band (AB) magnitude estimation
(MAGAUTOR) (6)
1473-1479 F7.4 mag imag [7.7/32]?=- i-band (AB) magnitude estimation
(MAGAUTOI) (6)
1481-1487 F7.4 mag zmag [6.9/32]?=- z-band (AB) magnitude estimation
(MAGAUTOZ) (6)
1489-1495 F7.4 mag Ymag [5/31]?=- Y-band (AB) magnitude estimation
(MAGAUTOY) (6)
1497-1505 F9.6 mag e_gmag [8E-6/100]?=- gmag uncertainty
(MAGERRAUTOG) (9)
1507-1515 F9.6 mag e_rmag [7E-6/100]?=- rmag uncertainty
(MAGERRAUTOR) (9)
1517-1525 F9.6 mag e_imag [1E-5/100]?=- imag uncertainty
(MAGERRAUTOI) (9)
1527-1535 F9.6 mag e_zmag [9E-6/100]?=- zmag uncertainty
(MAGERRAUTOZ) (9)
1537-1545 F9.6 mag e_Ymag [7E-6/100]?=- Ymag uncertainty
(MAGERRAUTOY) (9)
1547-1553 F7.4 mag gmag0 [6/99] Dereddened g-band (AB) magnitude
estimation (MAGAUTOG_DERED) (1)
1555-1561 F7.4 mag rmag0 [6/99] Dereddened r-band (AB) magnitude
estimation (MAGAUTOR_DERED) (1)
1563-1569 F7.4 mag imag0 [7/99] Dereddened i-band (AB) magnitude
estimation (MAGAUTOI_DERED) (1)
1571-1577 F7.4 mag zmag0 [6/99] Dereddened z-band (AB) magnitude
estimation (MAGAUTOZ_DERED) (1)
1579-1585 F7.4 mag Ymag0 [5/99] Dereddened Y-band (Ab) magnitude
estimation (MAGAUTOY_DERED) (1)
1587-1594 F8.4 mag gmagPSF [-38/28]?=- Weighted average g-band (AB)
magnitude, of PSF fit single epoch
detections (WAVGMAGPSF_G)
1596-1603 F8.4 mag rmagPSF [-29/27]?=- Weighted average r-band (AB)
magnitude, of PSF fit single epoch
detections (WAVGMAGPSF_R)
1605-1612 F8.4 mag imagPSF [-39/26]?=- Weighted average i-band (AB)
magnitude, of PSF fit single epoch
detections (WAVGMAGPSF_I)
1614-1621 F8.4 mag zmagPSF [-28/27]?=- Weighted average z-band (AB)
magnitude, of PSF fit single epoch
detections (WAVGMAGPSF_Z)
1623-1630 F8.4 mag YmagPSF [-17/24]?=- Weighted average Y-band (AB)
magnitude, of PSF fit single epoch
detections (WAVGMAGPSF_Y)
1632-1641 E10.3 mag e_gmagPSF [3.4E-25/18]?=- gmagPSF uncertainty
(WAVGMAGERRPSF_G)
1643-1652 E10.3 mag e_rmagPSF [3.9E-5/16]?=- rmagPSF uncertainty
(WAVGMAGERRPSF_R)
1654-1663 E10.3 mag e_imagPSF [1E-24/16]?=- imagPSF uncertainty
(WAVGMAGERRPSF_I)
1665-1674 E10.3 mag e_zmagPSF [4.5E-21/14]?=- zmagPSF uncertainty
(WAVGMAGERRPSF_Z)
1676-1685 E10.3 mag e_YmagPSF [4E-5/12]?=- YmagPSF uncertainty
(WAVGMAGERRPSF_Y)
1687-1694 F8.4 mag gmag0avg [-38/99] Dereddened weighted average g-band
(AB) magnitude (WAVGMAGPSFGDERED) (2)
1696-1703 F8.4 mag rmag0avg [-29/99] Dereddened weighted average r-band
(AB) magnitude (WAVGMAGPSFRDERED) (2)
1705-1712 F8.4 mag imag0avg [-39/99] Dereddened weighted average i-band
(AB) magnitude (WAVGMAGPSFIDERED) (2)
1714-1721 F8.4 mag zmag0avg [-28/99] Dereddened weighted average z-band
(AB) magnitude (WAVGMAGPSFZDERED) (2)
1723-1730 F8.4 mag Ymag0avg [-17/99] Dereddened weighted average Y-band
(AB) magnitude (WAVGMAGPSFYDERED) (2)
1732-1737 F6.4 mag EBV [4E-4/0.3] E(B-V) reddening coefficient from
Schlegel+ 1998ApJ...500..525S 1998ApJ...500..525S (EBV_SFD98)
1739-1746 F8.4 mag gBckg [-37/611] g-band (AB) background level, by
CCD-amplifier (BACKGROUND_G)
1748-1755 F8.4 mag rBckg [-25/536] r-band (AB) background level, by
CCD-amplifier (BACKGROUND_R)
1757-1765 F9.4 mag iBckg [-51/3294] i-band (AB) background level, by
CCD-amplifier (BACKGROUND_I)
1767-1775 F9.4 mag zBckg [-132/1498] z-band (AB) background level, by
CCD-amplifier (BACKGROUND_Z)
1777-1786 F10.4 mag YBckg [-34/19363] Y-band (AB) background level, by
CCD-amplifier (BACKGROUND_Y)
1788-1790 I3 --- gFlag [0/153] Cautionary flag for g-band
(<4=well behaved objects) (FLAGS_G) (3)
1792-1794 I3 --- rFlag [0/153] Cautionary flag for r-band
(<4=well behaved objects) (FLAGS_R) (3)
1796-1798 I3 --- iFlag [0/153] Cautionary flag for i-band
(<4=well behaved objects) (FLAGS_I) (3)
1800-1802 I3 --- zFlag [0/153] Cautionary flag for z-band
(<4=well behaved objects) (FLAGS_Z) (3)
1804-1806 I3 --- YFlag [0/153] Cautionary flag for Y-band
(<4=well behaved objects) (FLAGS_Y) (3)
1808 I1 --- gIsoFl [0/1] Flag identifying sources with
missing/flagged pixels, considering all
single epoch images in g-band
(1=unreliable photometry)
(IMAFLAGSISOG) (4)
1810 I1 --- rIsoFl [0/1] Flag identifying sources with
missing/flagged pixels, considering all
single epoch images in r-band
(1=unreliable photometry)
(IMAFLAGSISOR) (4)
1812 I1 --- iIsoFl [0/1] Flag identifying sources with
missing/flagged pixels, considering all
single epoch images in i-band
(1=unreliable photometry)
(IMAFLAGSISOI) (4)
1814 I1 --- zIsoFl [0/1] Flag identifying sources with
missing/flagged pixels, considering all
single epoch images in z-band
(1=unreliable photometry)
(IMAFLAGSISOZ) (4)
1816 I1 --- YIsoFl [0/1] Flag identifying sources with
missing/flagged pixels, considering all
single epoch images in Y-band
(1=unreliable photometry)
(IMAFLAGSISOY) (4)
--------------------------------------------------------------------------------
Note (1): Dereddened magnitude estimation (using
Schlegel, Finkbeiner & Davis, 1998ApJ...500..525S 1998ApJ...500..525S), for an elliptical
model based on the Kron radius.
Note (2): Dereddened weighted average magnitude (using
Schlegel, Finkbeiner and Davis, 1998ApJ...500..525S 1998ApJ...500..525S) from PSF fit
single epoch detections.
Note (3): Additive flag describing cautionary advice about source extraction
process (SExtractor extraction flags). Use less than 4 for well
behaved objects.
Note (4): For co-add objects, if any pixel is masked in all of the contributing
exposures for a given band, the IMAFLAGS_ISO=1 flag is set for that
band. This flag is predominantly set for saturated objects and objects
with missing data. We recommend a baseline quality criterion of
IMAFLAGS_ISO=0 (in the relevant bands) for most science applications
since the majority of flagged objects have unreliable photometry.
Note (5): From elliptical growth-curve, modeled in 2 dimensions [pixel].
Note (6): Magnitude estimation, for an elliptical model based on the Kron
radius.
Note (7): Morphology based classifier based on comparison between a PSF versus
exponential-PSF model. Values closer to 0 correspond to stars, larger
values correspond to galaxies.
Note (8): SPREAD_MODEL (http://sextractor.readthedocs.io/en/des_dr1/Model.html
#model-based-star-galaxy-separation-spread-model) exhibits better
performance than CLASS_STAR for morphological classification.
Note (9): Magnitudes with errors >100mag have been set to NULL values by CDS.
Note (10): "Infinite" values for WAVGSPREADMODEL g- and r-band haven been
set to NULL values by CDS.
Note (11): Errors calculated from SEXtractor; see the details in:
http://sextractor.readthedocs.io/en/des_dr1/Position.html#poserr-iso-def
--------------------------------------------------------------------------------
History:
Downloaded at: http://des.ncsa.illinois.edu/releases/dr1
(End) Thomas Boch, Emmanuelle Perret [CDS] 24-Apr-2019