J/ApJS/162/1 MUSYC: optical source catalog (Gawiser+, 2006)
The Multiwavelength Survey by Yale-Chile (MUSYC): survey design and deep public
UBVRIz' images and catalogs of the Extended Hubble Deep Field-South.
Gawiser E., Van Dokkum P.G., Herrera D., Maza J., Castander F.J.,
Infante L., Lira P., Quadri R., Toner R., Treister E., Urry C.M.,
Altmann M., Assef R., Christlein D., Coppi P.S., Duran M.F., Franx M.,
Galaz G., Huerta L., Liu C., Lopez S., Mendez R., Moore D.C., Rubio M.,
Ruiz M.T., Toft S., Yi S.K.
<Astrophys. J. Suppl. Ser., 162, 1-19 (2006)>
=2006ApJS..162....1G 2006ApJS..162....1G
ADC_Keywords: Galaxies, photometry ; Photometry, UBVRI
Keywords: galaxies: high-redshift - galaxies: photometry - surveys
Abstract:
We present UBVRIz' optical images taken with MOSAIC on the CTIO 4m
telescope of the 0.32°2 Extended Hubble Deep Field-South. This
is one of four fields comprising the MUSYC survey, which is optimized
for the study of galaxies at z=3, active galactic nucleus (AGN)
demographics, and Galactic structure. Our methods used for astrometric
calibration, weighted image combination, and photometric calibration
in AB magnitudes are described. We calculate corrected aperture
photometry and its uncertainties and find through tests that these
provide a significant improvement upon standard techniques. Our
photometric catalog of 62,968 objects is complete to a total magnitude
of RAB=25, with R-band counts consistent with results from the
literature.
Description:
Optical images of EHDF-S were taken on the nights of 2002 October 6,
8, 10, 12, and 2003 May 26, 27, and 28 using the 8192x8192pix MOSAIC II
camera consisting of eight 2048x4096 CCDs, each with two amplifiers,
on the Blanco 4m telescope at CTIO.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table7.dat 416 62968 Optical source catalog: astrometric and photometric
parameters determined from BVR detection image and
UBVRIz' photometry
--------------------------------------------------------------------------------
See also:
http://www.astro.yale.edu/MUSYC/ : MUSYC Home Page
J/A+A/379/740 : ESO Imaging Survey (EIS) (Arnouts+, 2001)
J/A+A/384/81 : ESO Imaging Survey. CDF-S point sources (Hatziminaoglou+ 2002)
J/A+AS/137/75 : ESO Imaging Survey. IV. (Zaggia+, 1999)
J/A+AS/137/83 : ESO Imaging Survey. VII. (Scodeggio+, 1999)
Byte-by-byte Description of file: table7.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- [GVH2006] [0,62967] Object number. First object as 0
7- 25 A19 --- MUSYC Object name (JHHMMSS.ss+DDMMSS.s)
27- 35 F9.6 h RAhour Right Ascension in decimal hours (J2000)
37- 46 F10.6 deg DEdeg Declination in decimal degrees (J2000)
48- 54 F7.2 pix Xpos The X position barycenter
56- 62 F7.2 pix Ypos The Y position barycenter
64- 67 F4.2 --- Class Stellarity classification (0=non-star 1=star)
69- 76 F8.4 arcsec FluxRad The half-light radius
78- 84 F7.4 arcsec rmsMaj Flux distribution rms along major axis
86- 92 F7.4 arcsec rmsMin Flux distribution rms along minor axis
94-101 F8.4 deg theta Position angle counterclockwise from x-axis
103-104 I2 --- Flag SExtractor output flag (1)
106-116 F11.4 uJy Uflux The U band AUTO flux
118-126 F9.4 uJy e_Uflux Uncertainty in Uflux from Eq. 11
128-138 F11.4 uJy Bflux The B band AUTO flux
140-148 F9.4 uJy e_Bflux Uncertainty in Bflux from Eq. 11
150-160 F11.4 uJy Vflux The V band AUTO flux
162-170 F9.4 uJy e_Vflux Uncertainty in Vflux from Eq. 11
172-182 F11.4 uJy Rflux The R band AUTO flux
184-192 F9.4 uJy e_Rflux Uncertainty in Rflux from Eq. 11
194-204 F11.4 uJy Iflux The I band AUTO flux
206-214 F9.4 uJy e_Iflux Uncertainty in Iflux from Eq. 11
216-226 F11.4 uJy z'flux The z' band AUTO flux
228-236 F9.4 uJy e_z'flux Uncertainty in z'flux from Eq. 11
238-251 F14.4 uJy Uapcorr The U band APCORR flux (2)
253-266 F14.4 uJy e_Uapcorr Uncertainty in Uapcorr (3)
268-281 F14.4 uJy Bapcorr The B band APCORR flux (2)
283-296 F14.4 uJy e_Bapcorr Uncertainty in Bapcorr (3)
298-311 F14.4 uJy Vapcorr The V band APCORR flux (2)
313-326 F14.4 uJy e_Vapcorr Uncertainty in Vapcorr (3)
328-341 F14.4 uJy Rapcorr The R band APCORR flux (2)
343-356 F14.4 uJy e_Rapcorr Uncertainty in Rapcorr (3)
358-371 F14.4 uJy Iapcorr The I band APCORR flux (2)
373-386 F14.4 uJy e_Iapcorr Uncertainty in Iapcorr (3)
388-401 F14.4 uJy z'apcorr The z' band APCORR flux (2)
403-416 F14.4 uJy e_z'apcorr Uncertainty in z'apcorr (3)
--------------------------------------------------------------------------------
Note (1): The flags column is the result of a maximum performed over the
flag values output by SExtractor for each image. Flag values of 8 or
greater imply truncation by the image border, and these objects should
be ignored. Flag values of 4-7 imply saturation in at least one filter
(or image truncation), and these objects are best ignored for most
scientific analyses. Flag values of 1-3 imply that the photometry is
the result of deblending from nearby objects and are not generally a
problem.
Note (2): After division by correction factor based on half-light radius
described in Eq. 7.
Note (3): From Eq. 11, after division by correction factors based on
half-light radius described in Eq. 7 and multiplication by additional
factor for extended sources described above.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 29-Aug-2006