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J/ApJ/642/L13 ECDFS MUSYC galaxies UBVRIzNB5000 photometry (Gawiser+, 2006)
The following files can be converted to FITS (extension .fit or fit.gz)
nbdetzo3.dat ubvrizo3.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/ApJ/642/L13
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Beginning of ReadMe :J/ApJ/642/L13 ECDFS MUSYC galaxies UBVRIzNB5000 photometry (Gawiser+, 2006)
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The physical nature of Lyalpha-emitting galaxies at z=3.1.
Gawiser E., van Dokkum P.G., Gronwall C., Ciardullo R., Blanc G.A.,
Castander F.J., Feldmeier J., Francke H., Franx M., Haberzettl L.,
Herrera D., Hickey T., Infante L., Lira P., Maza J., Quadri R.,
Richardson A., Schawinski K., Schirmer M., Taylor E.N., Treister E.,
Urry C.M., Virani S.N.
<Astrophys. J., 642, L13-L16 (2006)>
=2006ApJ...642L..13G
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ADC_Keywords: Surveys ; Galaxies, photometry ; Photometry, UBVRI ;
Photometry, narrow-band
Keywords: galaxies: high-redshift
Abstract:
We selected 40 candidate Lyalpha-emitting galaxies (LAEs) at z 3.1
with observed-frame equivalent widths greater than 150AA and
inferred emission-line fluxes above 2.5x10^-17^ergs/cm^2^/s from deep
narrowband and broadband MUSYC images of the Extended Chandra Deep
Field South. Covering 992-arcmin^2^, this is the largest "blank field"
surveyed for LAEs at z 3, allowing an improved estimate of the space
density of this population of (3+/-1)x10^4^h/Mpc^3^. Spectroscopic
follow-up of 23 candidates yielded 18 redshifts, all at z 3.1. Over
80% of the LAEs are dimmer in continuum magnitude than the typical
Lyman break galaxy (LBG) spectroscopic limit of R=25.5 (AB), with a
median continuum magnitude R 27 and very blue continuum colors,
V-z =0.
Description:
Our narrowband imaging of the ECDF-S was obtained using the narrowband
5000AA filter (NB5000; 50AA FWHM) with the CTIO 4m telescope and
MOSAIC II on several nights from 2002 to 2004 for a total of 29hr of
exposure time.
Our UBVRI imaging results from combining public images taken with the
ESO 2.2m and WFI by the ESO Deep Public Survey and COMBO-17 teams.
Our z' imaging was taken with the CTIO 4m and MOSAIC II on 2005
January 15. Our JK images of the ECDF-S were obtained with the CTIO 4m
and ISPI on several nights during 2003-2004
Images and other information available at www.astro.yale.edu/MUSYC;
see Gawiser et al. 2007, Cat. J/ApJS/162/1 for full description
including detailed definition and simulation of APCORR photometry
method. No psf-matching was performed as we seek high S/N for small
objects AUTO and APCORR both estimate total fluxes, AUTO via Kron
elliptical aperture, and APCORR via small FWHM-sized apertures plus
correction based on half-light radius and curve-of-growth measured for
point sources. AUTO slightly underestimates total fluxes, APCORR is
unbiased, APCORR offers higher S/N but is less robust for highly
extended sources. Corrected for Galactic extinction of E(B-V)=0.01
(Schlegel et al., 1998ApJ...500..525S). Flux densities are in microJy
and correspond to an AB zeropoint of 23.9:
mag_AB_=-2.5*log10(flux)+23.9