This is the README to the MUSYC Subaru v1.0 Catalog generated Febuary 2010 ECDFS_BVRdet_Subaru_v1 The catalogue contains over 84402 entries with positional and flux information from Sextractor and photometric redshift output from EAzY http://www.astro.yale.edu/eazy/ (Brammer et al. 2008) Please read the following notes on the catalog; column descriptions are listed below: (1) The catalog includes photometry in 32 MUSYC images of the ECDF-S region (including UU38BVRIzJHK, 18 medium bands and 4 IRAC channels) for all sources detected in the combined BVR image. More details about the photometry can be found in Cardamone et al. 2010, APJS. (2) The first 7 columns are standard outputs (Astrometric and geometric parameters) of SExstractor (http://terapix.iap.fr/IMG/pdf/sextractor.pdf) (3) Fluxes are SExtractor aperature fluxes in units of uJy [micro-Jansky]. In the catalog, this flux is listed in column #16, e.g. "FLUX_R". (4) Total fluxes for each source can be computed using the ratio of the AUTO flux to the APER Flux in the BVR image and the TOTCOR correction fraction computed using a stellar growth curve and a total aperture based on the kron radius. Such that F_TOT = F_APER * (BVR_FLUX_AUTO / F_BVR) * TOTCOR (5) We calculate the expected Galactic extinction in each band, assuming R = 3.1 and using the Galactic Extinction Curve of Cardelli et al. (1989) with updates in the optical region from O’Donnell (1994). We compute additional photometric offsets for each filter using a linear combination of galaxy templates to account for small offsets in photometry accross our photometric bands. See Cardamone et al. 2010 for more details. The following offsets should be applied to each filter, in order to obtain a corrected total flux: F_corrected=F_TOT * EXTCOR * COLCOR FILTER EXTCOR COLCOR ------ ------ ------ U38 1.038 1.185 U 1.040 1.253 B 1.032 0.952 V 1.026 0.934 R 1.020 0.933 I 1.013 0.971 z 1.012 0.866 J 1.007 1.022 H 1.005 1.011 K 1.003 0.791 IA427 1.035 0.769 IA445 1.034 0.892 IA464 1.032 1.054 IA484 1.030 0.934 IA505 1.028 0.874 IA527 1.027 0.990 IA550 1.025 0.891 IA574 1.024 0.952 IA598 1.022 0.942 IA624 1.021 0.898 IA651 1.020 0.971 IA679 1.020 1.033 IA709 1.019 1.001 IA738 1.018 0.952 IA767 1.017 0.924 IA797 1.016 0.933 IA827 1.015 1.103 IA856 1.013 0.907 IRAC36 1.001 1.000 IRAC45 1.001 1.000 IRAC58 1.001 1.000 IRAC80 1.000 1.000 (5) Objects close to bright stars or close to the border of the images, do not have reliable measured flux. Flag Values (1-124) are reported as measured by SExtractor, but flag values are offset by a value of 1000 in each band where the source lies off the edge of the region covered by the imaging or where the source lies inside the area covered by the brightest satuarted stars. SExtractor flag FLAGS contain, coded in additive numbers, all the extraction flags as a sum of powers of 2: 1 The object has neighbours, bright and close enough to significantly bias the MAG AUTO photometry or bad pixels (more than 10% of the integrated area affected), 2 The object was originally blended with another one, 4 At least one pixel of the object is saturated (or very close to), 8 The object is truncated (too close to an image boundary), 16 Object's aperture data are incomplete or corrupted, 32 Object's isophotal data are incomplete or corrupted 64 A memory overflow occurred during deblending, 128 A memory overflow occurred during extraction. (7) To go from flux in uJy to AB magnitude, please use: -2.5 log(flux) + 23.9 Expanded Column Destriptions: Column Units Descripton -------------------------------------------------------------------------------- NUM int Sequential Object Identifier, beginning from 0 RA [deg] right ascension J2000 from SExtractor DEC [deg] declination J2000 from SExtractor CLASS_STAR 0->1 Sextractor neural network classifier, 0 (Galaxy) -> 1 (star) KRON_RADIUS [pix] Sextractor Kron_radius A_IMAGE [pix] Sextractor parameter measuring major axis of image profile B_IMAGE [pix] Sextractor parameter measuring minor axis of image profile THETA_IMAGE [pix] Sextractor parameter measuring angle (counter-clockwise from the X-axis) of image profile AP_TOT [pix] Size of total apeture radius TOTCOR factor Approximate correction factor from Auto to total magnitude BVR_FLUX_AUTO muJy SExtractor AUTO flux measured on BVR image BVR_FLUXERR_AUTO muJy SExtractor AUTO flux error measured on BVR image F_BVR muJy Sextractor flux from aperture radius = 1xFWHM E_BVR muJy Error in flux (From empty apertures of size 1xFWHM) F_IA427 muJy Sextractor flux from aperture radius = 1xFWHM E_IA427 muJy Error in flux (From empty apertures of size 1xFWHM) Note that there are 32 pairs of these columns, one for each filter. BVR_FLAGS int SExtractor Flag from BVR detection image (see Note 7) MUSYCID* int Number of Corresponding source in MUSYC broad band image catalog (Gawiser et al. 2006) XR_FLAG** int Flag 1 if detected source is an X-ray Counterpart (Cardamone et al. 2008) Z_SPEC_ALL float Best Spectroscopic redshift ^1 Z_SPEC_SRC float Catalog from which adopted specz is taken ^1 Z_SPEC_QUAL int Quality Flag from Orginal Survey ^1 Z_PEAK float Redshift estimate from EAzY Z_PHOT_L68 float 68 % confidence lower limit EAzY Z_PHOT_U68 float 68 % confidence upper limit EAzY CHI_ZPHOT float Chi-squared value of EAzY best fit template combination Q_Z float Quality Flag from EAzY STAR_FLAG 0->1 1 if EAzY fit to stellar template is preferred V_RF float Rest-frame V-band flux from EAzY U-V_RF float Rest-frame U-V band color from EAzY V-J_RF float Rest-frame V-J band color from EAzY -------------------------------------------------------------------------------- * There are 84410 sources in the original MUSYC BVR-detected catalog (Gawiser et al. 2006), 47 of which are missing in this catalog. The missing sources have vmag[AB] ~26 or fainter, and were not detected as individual sources by Sextracted in most of the 32 bands. ** X-ray counterparts included an additional QSO template when finding redshift solutions and rest frame colors in EAzY ^1 Best redshift taken from compilations by Gabe & the GOODS team as well as the literature. Source Number (QF indicated) 1 VVDS, CIMOS VLT Deep Survey 1: 50% confidence in the redshift 2: 75% confidence in the redshift 3: 95% confidence in the redshift 4: 100% confidence in the redshift 9: Single emission line objects 2 Szokoly et al. 2004 3.0: reliable redshift determination with unambigous X-ray counterpart 2.0: reliable redshift determination 1.0: detection of some features (typically single narrow EL) 0.5: hint of some spectral features 0.0: no success 3 Croom et al. 2001 5 Van der Wel et al. 2004 6 Bunker et al. 2003 7 Stanway et al. 2004 10 Cristiani et al. 2000 11 Strogler et al. 2004 13 Stanway et al. 2004 18 MUSYC, Lira et al., in prep 19 Treister et al 2009 20 Cimatti et al. 2002 (K20) 21 Kriek et al. 22 VLT/FORS2 Vanzella et al. 2008 A: Solid redshift determination B: likely redshift determination C: tentative redshift determination 23 GOODS VIMOS (Balestra et al. 2010) Low Res Blue (LR) spectra v2.0.1 1:100% confidence in the redshift 2: 60% confidence in the redshift 3: 20% confidence in the redshift 24 GOODS VIMOS (Balestra et al. 2010) Med Res Orange (MR) spectra v2.0 1: 100% confidence in the redshift 2: 95% confidence in the redshift 3: 60% confidence in the redshift