******************************************************************* * * * Subaru/XMM-Newton Deep Survey -- SXDS * * Public Data Release 1 - DR1 Dec/27/2007 * * Subaru Telescope, NAOJ, SXDS Team * * * * DR1 README written on Dec/27/2007 * * revised on Dec/03/2008 * * revised on Jan/21/2016 * * * * All Questions and Comments should be directed to * * the Principal Investigator of SXDS Project: * * Dr. Kaz Sekiguchi (kaz.sekiguchi@nao.ac.jp) * * * ******************************************************************* ******************************************************************* * INFORMATION * ******************************************************************* *** LATEST DATASET *** The latest catalogs and images should be downloaded from the url: http://www.naoj.org/Science/SubaruProject/SXDS/ *** CATALOG PAPER *** The detailed information of observations, analysis, and data products of SXDS is described in the paper below. Furusawa et al. 2007 (Paper I), accepted by ApJS. *** DATA RELEASE HISTORY **** Version : Date : Status : Contenst 1. Beta : 2004.5 : Public : preliminary BRiz 2. version 1.0pre : 2004.4 : Internal : complete BRiz + pre V 3. version 1.0 : 2004.10 : Internal : complete BRiz + pre V 4. DR1 : 2007.12 : Public : complete BVRiz ******************************************************************* * IMAGES * ******************************************************************* *** POINTINGS *** The celestial pointings of the five SXDS-FOVs are defined as below. N E C W S This illustration is a north-is-up skyview. SXDS-C: RA=02h18m00s.000 DEC=-05d00m00s.00 EQUINOX=J2000; North is up SXDS-N: RA=02h18m00s.000 DEC=-04d35m00s.00 EQUINOX=J2000; North is up SXDS-S: RA=02h18m00s.000 DEC=-05d25m00s.00 EQUINOX=J2000; North is up SXDS-E: RA=02h19m47s.070 DEC=-05d00m00s.00 EQUINOX=J2000; East is up SXDS-W: RA=02h16m12s.930 DEC=-05d00m00s.00 EQUINOX=J2000; West is up *** PSF OF STACKED IMAGES *** PSF sizes of stacked images before the geometrical matching procedure. Filter FWHM(pix) *SXDS-C B1 4.0 V1 3.5 R1 3.8 i1 3.9 z1 3.5 *SXDS-N B2 4.2 V2 3.9 R2 3.9 i2 3.8 z2 3.7 *SXDS-S B3 4.1 V3 3.6 R3 3.7 i3 3.4 z3 3.8 *SXDS-E B4 4.1 V4 3.8 R4 3.8 i4 3.7 z4 3.7 *SXDS-W B5 3.9 V5 3.8 R5 4.1 i5 4.1 z5 3.7 *** GEOMETRICAL MATCHING TRANSFORMATION *** Images are matched and transformed to the R-band positions in individual fields of view by IRAF:GEOMAP 3-rd order polynomials with 3-sigma rejection. *SXDS-C pix pix B2R npts=1074 nrej=98 xdev=0.369 ydev=0.322 V2R npts=1067 nrej=86 xdev=0.210 ydev=0.144 i2R npts=928 nrej=44 xdev=0.120 ydev=0.146 z2R npts=988 nrej=63 xdev=0.106 ydev=0.106 *SXDS-N B2R npts=1035 nrej=63 xdev=0.193 ydev=0.181 V2R npts=1029 nrej=39 xdev=0.151 ydev=0.140 i2R npts=903 nrej=28 xdev=0.109 ydev=0.106 z2R npts=1044, nrej=51 xdev=0.145, ydev=0.126 *SXDS-S B2R npts=1052 nrej=74 xdev=0.242 ydev=0.269 V2R npts=1048 nrej=52 xdev=0.171 ydev=0.143 i2R npts=905 nrej=55 xdev=0.156 ydev=0.195 z2R npts=1050 nrej=57 xdev=0.135 ydev=0.125 *SXDS-E B2R npts=904 nrej=63 xdev=0.227 ydev=0.234 V2R npts=1064 nrej=76 xdev=0.188 ydev=0.194 i2R npts=952 nrej=51 xdev=0.164 ydev=0.138 z2R npts=1037 nrej=66 xdev=0.172 ydev=0.136 *SXDS-W B2R npts=1053 nrej=84 xdev=0.372 ydev=0.380 V2R npts=1062 nrej=75 xdev=0.152 ydev=0.142 i2R npts=888 nrej=28 xdev=0.101 ydev=0.111 z2R npts=1012 nrej=52 xdev=0.121 ydev=0.125 *** PSF GAUSSIAN SMOOTHING OF MATCHED IMAGES *** PSFs of images are convolved with Gaussian kernels by IRAF:GAUSS so that all the images in a certain field have the identical PSF size. These are the final PSF sizes of images used for making catalogs. SXDS-C (4.00 pix 0".80) SXDS-N (4.20 pix 0".84) SXDS-S (4.10 pix 0".82) SXDS-E (4.10 pix 0".82) SXDS-W (4.10 pix 0".82) *** MASK FOR STREAKS AND STELLAR HALOS *** For strong streaks and halos For weak halos (flagged 1) (flagged 2) *SXDS-C mask1_bloom_dr1.lis mask1_halo_dr1.lis *SXDS-N mask2_bloom_dr1.lis mask2_halo_dr1.lis *SXDS-S mask3_bloom_dr1.lis mask3_halo_dr1.lis *SXDS-E mask4_bloom_dr1.lis mask4_halo_dr1.lis *SXDS-W mask5_bloom_dr1.lis mask5_halo_dr1.lis * Format (1) circular masks sxds_mask_file corresponding dso format(*1) c $1 $2 $3 ==> circle($1,$2,$3) ex. c 6044 7915 1448 ==> circle(6044,7915,1448) c 3573 8659 552 ==> circle(3573,8659,552) (2) box masks sxds_mask_file corresponding dso format(*1) b $1 $2 $3 $4 ==> box(($1+$2)/2.,($3+$4)/2.,($2-$1),($4-$3)) ex. b 192 207 3891.5 4308 ==> box(199.5,4099.75,15,416.5) b 759.5 895 6455 6694.5 ==> box(827.25 6574.75 135.5 239.5) (*1) mask files converted to the dso format is compatible with the mask file provided in the SDF project. *** EFFECTIVE AREAS OF THE CATALOGS *** AreaCovered(flag 0,1,2) EffectiveArea(flag 0,2) (arcmin^2 ) (arcmin^2 ) *SXDS-C 1041.9 968.4 *SXDS-N 1011.7 951.8 *SXDS-S 1008.4 967.3 *SXDS-E 986.4 917.3 *SXDS-W 1017.7 913.9 ******************************************************************* * CATALOGS * ******************************************************************* *** Source Extractor Configuration *** sxds.sex sxds.param *** DETECTION THRESHOLDS *** *SXDS-C ADU ADU ADU B: Background: -3.25864 RMS: 6.42974 / Threshold: 12.8595 V: Background: -1.51775 RMS: 2.26303 / Threshold: 4.52605 R: Background: -3.60052 RMS: 6.21281 / Threshold: 12.4256 i: Background: -4.09709 RMS: 4.63342 / Threshold: 9.26683 z: Background: -2.46088 RMS: 4.36508 / Threshold: 8.73016 *SXDS-N ADU ADU ADU B: Background: -3.10388 RMS: 5.62465 / Threshold: 11.2493 V: Background: -1.6222 RMS: 2.84997 / Threshold: 5.69995 R: Background: -3.67073 RMS: 5.4826 / Threshold: 10.9652 i: Background: -4.23928 RMS: 4.39103 / Threshold: 8.78207 z: Background: -1.25862 RMS: 2.01863 / Threshold: 4.03726 *SXDS-S ADU ADU ADU B: Background: -2.98757 RMS: 5.15298 / Threshold: 10.306 V: Background: -1.51395 RMS: 2.87192 / Threshold: 5.74383 R: Background: -3.60084 RMS: 5.00378 / Threshold: 10.0076 i: Background: -4.14776 RMS: 4.67164 / Threshold: 9.34328 z: Background: -1.27281 RMS: 2.76616 / Threshold: 5.53231 *SXDS-E ADU ADU ADU B: Background: -3.08974 RMS: 5.78414 / Threshold: 11.5683 V: Background: -1.5242 RMS: 2.40162 / Threshold: 4.80324 R: Background: -3.51793 RMS: 5.67534 / Threshold: 11.3507 i: Background: -3.92566 RMS: 4.40501 / Threshold: 8.81002 z: Background: -1.89712 RMS: 3.35387 / Threshold: 6.70774 *SXDS-W ADU ADU ADU B: Background: -3.09516 RMS: 5.00223 / Threshold: 10.0045 V: Background: -1.68443 RMS: 2.37062 / Threshold: 4.74123 R: Background: -3.42662 RMS: 7.37398 / Threshold: 14.748 i: Background: -4.33764 RMS: 5.35254 / Threshold: 10.7051 z: Background: -1.91693 RMS: 3.12638 / Threshold: 6.25275 *** PHOTOMETRIC ZEROPOINTS *** Photmetric zeropoints of the beta version release are determined by comparison of total flux of stellar objects in SXDS images with those in the images taken during Guaranteed Time Observations of Surpime-Cam team. Consistency of the photometric zeropoints in respective bands is justified by comparing colors of stellar objects in our catalogs with those of Gunn-Stryker stars (1983, ApJs, 52, 121). Note that no color terms are given and instrumental AB magnidues are used in the beta version. BC=34.723 magAB/ADU/900sec BN=34.701 magAB/ADU/900sec BS=34.706 magAB/ADU/900sec BE=34.698 magAB/ADU/900sec BW=34.716 magAB/ADU/900sec VC=33.639 magAB/ADU/300sec VN=33.648 magAB/ADU/300sec VS=33.643 magAB/ADU/300sec VE=33.639 magAB/ADU/300sec VW=33.649 magAB/ADU/300sec RC=34.315 magAB/ADU/480sec RN=34.276 magAB/ADU/480sec RS=34.219 magAB/ADU/480sec RE=34.259 magAB/ADU/480sec RW=34.247 magAB/ADU/480sec iC=34.055 magAB/ADU/300sec iN=34.042 magAB/ADU/300sec iS=34.046 magAB/ADU/300sec iE=33.986 magAB/ADU/300sec iW=34.087 magAB/ADU/300sec zC=33.076 magAB/ADU/240sec zN=32.278 magAB/ADU/120sec zS=32.258 magAB/ADU/120sec zE=32.743 magAB/ADU/180sec zW=32.776 magAB/ADU/180sec *** LIMITING MAGNITUDES *** 1: bandpass and field 2: number of shots stacked 3: exposure time range (sec) 4: total exposure time (sec) 5: PSF FWHM of stacked images (pix) 6: exposure time of reference shot used in stacking (sec) 7: five-sigma limiting magnitudes (AB) estimated by 2"phi random aperture photometry 1 2 3 4 5 6 7 # exptime total psf ref mag5sgm BC 23 900-900 20700 4.00 900 27.54 BN 22 900-900 19800 4.20 900 27.84 BS 22 900-900 19800 4.10 900 27.78 BE 22 900-900 19800 4.10 900 27.51 BW 22 900-900 19800 3.90 900 27.66 VC 30 300-900 19140 3.60 300 27.23 VN 26 300-900 18780 4.00 300 27.10 VS 31 300-900 19260 4.10 300 27.20 VE 27 300-900 17460 3.80 300 27.22 VW 29 300-720 17580 3.60 300 27.17 RC 31 480-480 14880 3.80 480 27.02 RN 29 480-480 13920 3.90 480 27.19 RS 29 480-480 13920 3.70 480 27.12 RE 29 480-480 13920 3.80 480 26.96 RW 29 480-480 13920 4.10 480 26.98 iC 141 180-300 38820 3.90 300 27.07 iN 99 180-300 26405 3.80 300 27.11 iS 75 120-300 18540 3.40 300 26.92 iE 91 150-300 22060 3.70 300 26.94 iW 138 120-300 35883 4.10 300 27.03 zC 62 150-240 13020 3.50 240 26.02 zN 80 120-240 15122 3.70 120 26.09 zS 63 120-240 11040 3.80 120 25.84 zE 63 120-240 15990 3.70 180 25.94 zW 92 150-240 18660 3.70 180 26.05 * Columns 2--5 of V band corrected on 2016-01-21 JST *** GALACTIC EXTINCTION *** Galactic extinction is estimated at (2h18m00.00000s, -5d00m00.0000s) based on Schlegel et al. (1998ApJ...500..525S). Note that all the magnitudes in the catalogs are not corrected for the Galactic extincion. bandpass extinction(mag) B 0.091 V 0.070 R 0.056 i 0.044 z 0.031 *** ASTROMETRIC CALIBRATION *** Astrometric calibtration is made in the R-band images using WCS coordinates of 2MASS stars with IRAF:CCMAP (ax+by+c). FITTING RMS RA DEC (arcsec) (arcsec) *SXDS-C 0.160 0.151 (233 obj) *SXDS-N 0.220 0.218 (208 obj) *SXDS-S 0.251 0.207 (194 obj) *SXDS-E 0.261 0.225 (199 obj) *SXDS-W 0.217 0.201 (218 obj) EOF