The Cosmic Dawn Survey (DAWN) photometric catalogues - PL We present here the catalogue containing the photometry for about 6.3 million total sources detected with SEP on a HSC riz CHI-MEAN image and extracted with The Tractor across both Euclid Deep Field North (EDF-N) and Euclid Deep Field Fornax (EDF-F). The number of sources per field is proportional to their respective areas (see below) as covered by the DAWN survey PL catalogues. A parametric model of every detected source is determined with HSC riz imaging, convolved with the PSF of a given band, and optimised to measure flux which is treated as a free parameter for each of the remaining bands. Model parameters (radius, shape, etc.) are available upon request. The catalogues also include photometric redshifts from both EAZY and LePhare, and galaxy physical properties from LePhare. The full description of these catalogues is in Zalesky et al. (submitted). Updated 08/2024 contact: zalesky@hawaii.edu ----- DAWN survey PL catalog areas ------ [unit] = deg2 -- EDFN: A: Total area = 16.865 B: Total area, stars = 1.687 C: Total area, bad models = 0.074 D: Total usable area A-B-C = 15.104 Total full-depth area = 9.373 Total full-depth area stars = 0.898 Total full-depth area bad models = 0.055 Total full-depth usable area = 8.420 -- EDFF: Total area = 2.854 Total area stars = 0.088 Total area bad models = 0.014 Total usable area = 2.752 Total full-depth area = 1.767 Total full-depth area stars = 0.047 Total full-depth area bad models = 0.010 Total full-depth usable area = 1.710 ######################################################## Identification ######################################################## Identifier # name = 'ID' Right Ascension and Declination # name = 'ALPHA_J2000'; unit = 'deg' # name = 'DELTA_J2000'; unit = 'deg' Coordinates above are based on model centroids, or SEP when models not available Position, as determined by model centroid # name = 'X_MODEL'; unit = 'pixel' # name = 'Y_MODEL'; unit = 'pixel' # name = 'ERRX_MODEL'; unit = 'pixel' # name = 'ERRY_MODEL'; unit = 'pixel' Position, as determined by SEP at detection, in J2000 # name = 'ALPHA_DETECTION'; unit = 'deg' # name = 'DEC_DETECTION'; unit = 'deg' Farmer model information # name = 'FARMER_ID' Farmer internal source identifier ({brick}_{source}) # name = 'GROUP_ID' Farmer group identifier; unique within a brick # name = 'N_GROUP' Farmer group occupation number # name = 'MODEL_FLAG' (0: OK, 1: failed to converge, 2: drifted >0.6" from detection) # name = 'SOLUTION_MODEL' The Tractor model type selected by The Farmer Model shape information may be provided in a future release. ######################################################## Flags ######################################################## Flag indicating whether the object is in the full-depth region or not # name = 'FULL_DEPTH_PL' (0:not full-depth, 1:full-depth) ######################################################## Galactic extinction at the object position ######################################################## E(B-V) values from Schlegel, Finkbeiner & Davis (1998) dust map By default, a scaling of 0.86 is applied to the map values to reflect the recalibration by Schlafly & Finkbeiner (2011) # name = 'EBV_MW'; unit = 'mag' ######################################################## Photometry ######################################################## No data convention flux, fluxerr, mag, magerr = NaN Negative flux convention mag, magerr = NaN NOTE: The photometry are not corrected for Milky Way extinction. NOTE: The photometry are not corrected for photometric offsets derived by LePhare or EAZY NOTE: The photometry errors are not corrected for the correlated noise in the images. ######################################################## List of bands CFHT/MegaCam (Hawaii Twenty Square Degree Survey): u Subaru/HSC (Hawaii Twenty Square Degree Survey): g, r, i, z, y, NB0816, NB0921 Sptizer/IRAC (Cosmic Dawn Survey): IRAC_CH1, IRAC_CH2 NOTE: HSC y-band, NB0816 and NB0921, are archival data included in this release. NOTE: EDFF does not have any HSC y-band imaging. Total model fluxes, flux errors, magnitudes and magnitude errors # name = '###_FLUX'; unit = 'uJy' # name = '###_FLUXERR'; unit = 'uJy' # name = '###_MAG'; unit = 'mag' # name = '###_MAGERR'; unit = 'mag' NOTE: aperture corrections should not be applied # name = '###_CHISQ' Reduced Chi2 goodness of fit statistic for source profile model # name = '###_DRIFT' Distance travelled from ALPHA/DELTA_J2000 (i.e. model centroid) # name = '###_VALID' Set to False where FLUX or FLUXERR not trustworthy # name = 'VALID_SOURCE' Set to False when photometry failed # name = 'SOLUTION_MODEL' The Tractor model type selected by The Farmer #################################################### Le Phare photo-z and physical parameters #################################################### # NOTE: MW correction derived from Schlafly&Finkbeiner+2011 values assuming Allen+1976 reddening Best fit obtained with the galaxy templates # name = 'lp_zPDF' photo-z measured using the galaxy templates. Median of the likelihood distribution. # name = 'lp_zPDF_l68' lower limit, 68% confidence level # name = 'lp_zPDF_u68' upper limit, 68% confidence level # name = 'lp_zMinChi2' photo-z measured using galaxy templates. Photo-z defines as the minimum of the chi2 distribution. # name = 'lp_chi2_best' reduced chi2 (-99 if less than 3 filters) for zMinChi2 # name = 'lp_zp_2' second photo-z solution if a second peak is detected with P>5% in the PDF # name = 'lp_chi2_2' reduced chi2 for the second photo-z solution # name = 'lp_NbFilt' Number of filters used in the fit ######################################################## Best fit obtained with the AGN templates # name = 'lp_zq' photoz for the AGN library. # name = 'lp_chiq' reduced chi2 # name = 'lp_modq' best fit template NOTE: This value is only informative: no correction for variability is applied. ######################################################## Best fit obtained with the STAR templates # name = 'lp_mods' model for the star library # name = 'lp_chis' reduced chi2 ######################################################## Physical Properties Derived from the BC03 best-fit templates at zPDF (Chabrier IMF; cosmo:70,0.3,0.7; BC03 tau+delayed models described in Ilbert et al. 2015). NOTE: A value is computed for all sources, even those classified as star Best fit BC03 model at zPDF # name = 'lp_model' best-fit model index # name = 'lp_age' age of best-fit template in years # name = 'lp_dust' best-fit color excess E(B-V) # name = 'lp_Attenuation' best-fit dust law index Absolute rest-frame AB magnitudes # name = 'lp_MNUV' NUV galex # name = 'lp_MR' r Subaru HSC # name = 'lp_MJ' J VISTA Galaxy Stellar Mass # name = 'lp_mass_med' log Stellar mass from BC03 best-fit template. median of the PDF # name = 'lp_mass_med_min68' lower limit, 68% confidence level # name = 'lp_mass_med_max68' upper limit, 68% confidence level # name = 'lp_mass_best' log Stellar mass from BC03 best-fit template. Taken at the minimum chi2 SFR and sSFR # name = 'lp_SFR_med' log SFR from BC03 best-fit template. median of the PDF # name = 'lp_SFR_med_min68' lower limit, 68% confidence level # name = 'lp_SFR_med_max68' upper limit, 68% confidence level # name = 'lp_SFR_best' log SFR from BC03 best-fit template. Taken at the minimum chi2 # name = 'lp_sSFR_med' log sSFR from BC03 best-fit template. median of the PDF # name = 'lp_sSFR_med_min68' lower limit, 68% confidence level # name = 'lp_sSFR_med_max68' upper limit, 68% confidence level # name = 'lp_sSFR_best' log sSFR from BC03 best-fit template. Taken at the minimum chi2 NOTE: SFR and sSFR is computed without IR, large uncertainties with such methods #################################################### EAZY photo-z and physical parameters #################################################### NOTE: EAZY uses one value of Galactic extinction for all sources, which is the median of the 'EBV_MW' column. Photometric redshift Derived using the latest development version of eazy-py. See paper for details. # name = 'ez_z_ml' maximum a-posteriori photometric redshift # name = 'ez_z_ml_chi2' chi2 at z_ml, with z-prior # name = 'ez_z_ml_risk' risk parameter from Tanaka+2018; R(ez_z_ml) # name = 'ez_z_phot' user-defined redshift for calculating rest-frame propreties (= ez_z500) # name = 'ez_z_phot_chi2' chi2 at z_phot, with z-prior # name = 'ez_z_phot_risk' risk parameter from Tanaka+2018; R(ez_z_phot) # name = 'ez_z_min_risk' redshift where R(z) is minimised # name = 'ez_min_risk' R(ez_z_min_risk) # name = 'ez_z_raw_chi2' redshift where chi2 is minimised, without priors # name = 'ez_raw_chi2' chi2 at ez_z_raw_chi2 Redshift probability distribution percentiles # name = 'ez_z###' 025, 160, 500, 840, 975 corresponds to 2.5%, 16%, 50%, 84%, 97.5% Fitting parameters # name = 'ez_nusefilt' number of filters used for photo-z (i.e., not masked as missing data) # name = 'ez_lc_min' minimum effective wavelength of valid filters, Angstrom # name = 'ez_lc_max' maximum effective wavelength of valid filters, Angstrom Best-fit stellar templates # name = 'ez_star_min_chi2' chi2 of best stellar template fit (BT-SETTL models); assumes 8% systematic uncertainty # name = 'ez_star_teff' effective temperature of the stellar template; unit = 'K' ########################################################