J/ApJS/189/270 MUSYC optical imaging in ECDF-S (Cardamone+, 2010)
The Multiwavelength Survey by Yale-Chile (MUSYC): deep medium-band optical
imaging and high-quality 32-band photometric redshifts in the ECDF-S.
Cardamone C.N., Van Dokkum P.G., Urry C.M., Taniguchi Y., Gawiser E.,
Brammer G., Taylor E., Damen M., Treister E., Cobb B.E., Bond N.,
Schawinski K., Lira P., Murayama T., Saito T., Sumikawa K.
<Astrophys. J. Suppl. Ser., 189, 270-285 (2010)>
=2010ApJS..189..270C 2010ApJS..189..270C
ADC_Keywords: Surveys ; Galaxies, photometry ; Photometry, UBVRI ;
Photometry, infrared
Keywords: catalogs - cosmology: observations - galaxies: evolution -
galaxies: formation - surveys
Abstract:
We present deep optical 18-medium-band photometry from the Subaru
telescope over the ∼30'x30' Extended Chandra Deep Field-South, as part
of the Multiwavelength Survey by Yale-Chile (MUSYC). This field has a
wealth of ground- and space-based ancillary data, and contains the
GOODS-South field and the Hubble Ultra Deep Field. We combine the
Subaru imaging with existing UBVRIzJHK and Spitzer IRAC images to
create a uniform catalog. Detecting sources in the MUSYC "BVR" image
we find ∼40,000 galaxies with RAB<25.3, the median 5σ limit of
the 18 medium bands. Photometric redshifts are determined using the
EAzY code and compared to ∼2000 spectroscopic redshifts in this field.
The medium-band filters provide very accurate redshifts for the
(bright) subset of galaxies with spectroscopic redshifts, particularly
at 0.1<z<1.2 and at z~>3.5. For 0.1<z<1.2, we find a 1σ scatter
in {DELTA}z/(1+z) of 0.007, similar to results obtained with a similar
filter set in the COSMOS field. As a demonstration of the data
quality, we show that the red sequence and blue cloud can be cleanly
identified in rest-frame color-magnitude diagrams at 0.1<z<1.2. We
find that ∼20% of the red sequence galaxies show evidence of dust
emission at longer rest-frame wavelengths. The reduced images,
photometric catalog, and photometric redshifts are provided through
the public MUSYC Web site (http://www.astro.yale.edu/MUSYC/).
Description:
We carried out a medium-band imaging campaign on the Subaru Telescope
using the wide field-of-view camera Suprime-Cam. Observations were
collected in six runs over 2 years, in 2006 January, February, and
December and 2007 January, March, and December.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
bvrdetv1.dat 1027 84402 *MUSYC Subaru v1.0 Catalog (Febuary 2010), part 1
photomv1.dat 147 84402 MUSYC Subaru v1.0 Catalog (Febuary 2010), part 2
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Note on bvrdetv1.dat: There are 84410 sources in the original MUSYC BVR-detected
catalog (Gawiser et al., 2006ApJ...642L..13G 2006ApJ...642L..13G), 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.
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See also:
J/ApJS/183/295 : A K-selected catalog of the ECDFS from MUSYC (Taylor+, 2009)
J/ApJ/680/130 : Mid-IR colors of AGNs in the MUSYC ECDF-S (Cardamone+, 2008)
J/ApJ/727/1 : IRAC/MUSYC SIMPLE survey (Damen+, 2011)
Byte-by-byte Description of file: bvrdetv1.dat
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Bytes Format Units Label Explanations
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4- 8 I5 --- Seq [0/84401] Sequential Object Identifier
12- 21 F10.6 deg RAdeg Right ascension J2000 from SExtractor
25- 34 F10.6 deg DEdeg Declination J2000 from SExtractor
43- 47 F5.3 --- S/G [0/1] Sextractor neural network classifier,
0 (Galaxy) -> 1 (star)
55- 60 F6.3 pix Rkron Sextractor Kron_radius
67- 73 F7.3 pix A Sextractor parameter measuring major axis
of image profile
81- 86 F6.3 pix B Sextractor parameter measuring minor axis
of image profile
93- 99 F7.3 deg theta [-90/90] Sextractor parameter measuring angle
(counter-clockwise from the X-axis)
of image profile
107- 112 F6.3 pix Aptot [0.99/12.8] Size of total aperture radius
120- 125 F6.3 --- Totcor [0/18.3] Approximate correction factor from
Auto to total magnitude
129- 138 F10.3 uJy FAuto SExtractor AUTO flux measured on BVR image
147- 151 F5.3 uJy e_FAuto [0.008] SExtractor AUTO flux error measured on
BVR image
157- 164 F8.3 uJy Flux BVR image Sextractor flux (1)
172- 177 F6.3 uJy e_Flux [-0.8/30] Error in flux (2)
183- 190 F8.3 uJy FU38 U38 band Sextractor flux (1)
198- 203 F6.3 uJy e_FU38 [-0.7/0.32] Error in flux (2)
209- 216 F8.3 uJy FU U band Sextractor flux (1)
224- 229 F6.3 uJy e_FU [-0.1/0.8] Error in flux (2)
235- 242 F8.3 uJy FB B band Sextractor flux (1)
250- 255 F6.3 uJy e_FB [-0.2/0.2] Error in flux (2)
261- 268 F8.3 uJy FV V band Sextractor flux (1)
276- 281 F6.3 uJy e_FV [-0.2/0.7] Error in flux (2)
287- 294 F8.3 uJy FR R band Sextractor flux (1)
303- 307 F5.3 uJy e_FR [0.012] Error in flux (2)
313- 320 F8.3 uJy FI I band Sextractor flux (1)
328- 333 F6.3 uJy e_FI [-6.2/2.9] Error in flux (2)
339- 346 F8.3 uJy Fz z band Sextractor flux (1)
354- 359 F6.3 uJy e_Fz [-2/4.2] Error in flux (2)
364- 372 F9.3 uJy FJ J band Sextractor flux (1)
379- 385 F7.3 uJy e_FJ [-30/32] Error in flux (2)
388- 398 F11.3 uJy FH H band Sextractor flux (1)
405- 411 F7.3 uJy e_FH [-40/24] Error in flux (2)
416- 424 F9.3 uJy FK K band Sextractor flux (1)
431- 437 F7.3 uJy e_FK [-12.8/27.2] Error in flux (2)
443- 450 F8.3 uJy FIA427 IA427 (4256.3Å) band Sextractor flux (1)
458- 463 F6.3 uJy e_FIA427 [-3.9/7.5] Error in flux (2)
469- 476 F8.3 uJy FIA445 IA445 (4450Å, B) band Sextractor flux (1)
483- 489 F7.3 uJy e_FIA445 [-11/2.1] Error in flux (2)
494- 502 F9.3 uJy FIA464 IA464 (4633.3Å) band Sextractor flux (1)
509- 515 F7.3 uJy e_FIA464 [-10.5/176.4] Error in flux (2)
522- 528 F7.3 uJy FIA484 IA484 (4845.9Å) band Sextractor flux (1)
537- 541 F5.3 uJy e_FIA484 [0.014] Error in flux (2)
547- 554 F8.3 uJy FIA505 IA505 (5060.7Å) band Sextractor flux (1)
562- 567 F6.3 uJy e_FIA505 [-0.63/0.31] Error in flux (2)
574- 580 F7.3 uJy FIA527 IA527 (5258.9Å) band Sextractor flux (1)
589- 593 F5.3 uJy e_FIA527 [0.014] Error in flux (2)
600- 606 F7.3 uJy FIA550 IA550 (V) band Sextractor flux (1)
614- 619 F6.3 uJy e_FIA550 [-3.8/44.7] Error in flux (2)
625- 632 F8.3 uJy FIA574 IA574 (5762.1Å) band Sextractor flux (1)
640- 645 F6.3 uJy e_FIA574 [-0.62/0.43] Error in flux (2)
652- 658 F7.3 uJy FIA598 IA598 (6000Å) band Sextractor flux (1)
667- 671 F5.3 uJy e_FIA598 [0.016] Error in flux (2)
678- 684 F7.3 uJy FIA624 IA624 (6230.0Å) band Sextractor flux (1)
693- 697 F5.3 uJy e_FIA624 [0.018] Error in flux (2)
704- 710 F7.3 uJy FIA651 IA651 (6502Å) band Sextractor flux (1)
719- 723 F5.3 uJy e_FIA651 [0.015] Error in flux (2)
730- 736 F7.3 uJy FIA679 IA679 (6778.8Å) band Sextractor flux (1)
745- 749 F5.3 uJy e_FIA679 [0.016] Error in flux (2)
755- 762 F8.3 uJy FIA709 IA709 (7010.7Å) band Sextractor flux (1)
769- 775 F7.3 uJy e_FIA709 [-79/6] Error in flux (2)
782- 788 F7.3 uJy FIA738 IA738 (7358.7Å) band Sextractor flux (1)
797- 801 F5.3 uJy e_FIA738 [0.018] Error in flux (2)
808- 814 F7.3 uJy FIA767 IA767 (7681.2Å) band Sextractor flux (1)
823- 827 F5.3 uJy e_FIA767 [0.045] Error in flux (2)
834- 840 F7.3 uJy FIA797 IA797 (7970Å) band Sextractor flux (1)
849- 853 F5.3 uJy e_FIA797 [0.056] Error in flux (2)
859- 866 F8.3 uJy FIA827 IA827 (8240.9Å) band Sextractor flux (1)
873- 879 F7.3 uJy e_FIA827 [-29/52]?=- Error in flux (2)
886- 892 F7.3 uJy FIA856 IA856 (8560Å) band Sextractor flux (1)
901- 905 F5.3 uJy e_FIA856 [0.072] Error in flux (2)
910- 918 F9.3 uJy F3.6 Spitzer/IRAC 3.6µm band Sextractor flux (1)
924- 931 F8.3 uJy e_F3.6 [-304/8200] Error in flux (2)
937- 944 F8.3 uJy F4.5 Spitzer/IRAC 4.5µm band Sextractor flux (1)
950- 957 F8.3 uJy e_F4.5 [-106/311] Error in flux (2)
962- 970 F9.3 uJy F5.8 Spitzer/IRAC 5.8µm band Sextractor flux (1)
976- 983 F8.3 uJy e_F5.8 [-233/472] Error in flux (2)
988- 996 F9.3 uJy F8.0 Spitzer/IRAC 8.0µm band Sextractor flux (1)
1002-1009 F8.3 uJy e_F8.0 [-276/197] Error in flux (2)
1016-1019 I4 --- Flags SExtractor Flag from BVR detection image (3)
1022-1027 I6 --- MUSYC Number of Corresponding source in MUSYC broad
band image catalog (see Taylor et al. 2009,
Cat. J/ApJS/183/295)
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Note (1): From aperture radius = 1xFWHM; not corrected from Galactic absorption.
Note (2): From empty apertures of size 1xFWHM
Note (3): 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
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Byte-by-byte Description of file: photomv1.dat
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Bytes Format Units Label Explanations
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2- 6 I5 --- Seq [0/84401] Sequential Object Identifier
10- 19 F10.6 deg RAdeg Right ascension J2000 from SExtractor
24- 33 F10.6 deg DEdeg Declination J2000 from SExtractor
42 I1 --- X [0/1] Flag 1 if detected source is an X-ray
Counterpart (Cardamone et al. 2008,
Cat. J/ApJ/680/130) (4)
46- 51 F6.3 --- zsp ?=-1 Best Spectroscopic redshift
59- 60 I2 --- r_zsp [1/24]?=-1 Catalog from which adopted
spectrosocopic redshfit is taken (5)
66- 67 I2 --- q_zsp ?=-1 Quality Flag from Orginal Survey (5)
70- 76 F7.3 --- zph ?=-99.000 Redshift estimate from EAzY
79- 85 F7.3 --- E_zph ?=-99.000 68% confidence lower limit EAzY
88- 94 F7.3 --- e_zph ?=-99.000 68% confidence upper limit EAzY
96-103 F8.3 --- chizph ?=-99.000 Chi-squared value of EAzY best fit
template combination
105-112 F8.3 --- q_zph ?=-99.000 Quality Flag from EAzY (best ≤1)
120 I1 --- S/G2 [0/1] 1 if EAzY fit to stellar template is
preferred
124-129 F6.2 mag FVRF ?=99.00 Rest-frame V-band flux from EAzY
134-138 F5.2 mag U-VRF ?=99.00 Rest-frame U-V band color from EAzY
143-147 F5.2 mag V-JRF ?=99.00 Rest-frame V-J band color from EAzY
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Note (4): X-ray counterparts included an additional QSO template when
finding redshift solutions and rest frame colors in EAzY
Note (5): Best redshift taken from compilations by Gabe & the GOODS team as
well as the literature, as follows:
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, Cat. J/ApJS/155/271
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, Cat. J/MNRAS/328/150
5 = Van der Wel et al., 2004ApJ...601L...5V 2004ApJ...601L...5V
10 = Cristiani et al. 2000A&A...359..489C 2000A&A...359..489C
11 = Strogler et al., 2004, Cat. J/ApJ/613/200
18 = MUSYC, Lira et al., in prep
19 = Treister et al, 2009, Cat. J/ApJ/693/1713
20 = Cimatti et al., 2002, Cat. J/A+A/392/395 (K20)
21 = Kriek et al., 2008, Cat. J/ApJ/677/219
22 = VLT/FORS2 Vanzella et al., 2008, Cat. J/A+A/478/83;
A: Solid redshift determination;
B: likely redshift determination;
C: tentative redshift determination
23 = GOODS VIMOS (Balestra et al., 2010, Cat. J/A+A/512/A12)
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, Cat. J/A+A/512/A12)
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
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History:
Copied at http://www.astro.yale.edu/MUSYC/
(End) Patricia Vannier [CDS] 04-Oct-2011