J/A+A/572/A87 WINGS galaxies surface photometry with GASPHOT (D'Onofrio+, 2014)
Surface photometry of the WINGS galaxies with GASPHOT.
D'Onofrio M., Bindoni D., Fasano G., Bettoni D., Cava A., Fritz J.,
Gullieuszik M., Kjaergaard P., Moretti A., Moles M., Omizzolo A.,
Poggianti B.M., Valentinuzzi T., Varela J.
<Astron. Astrophys. 572, A87 (2014)>
=2014A&A...572A..87D 2014A&A...572A..87D
ADC_Keywords: Clusters, galaxy ; Galaxies, photometry ; Photometry, CCD
Keywords: galaxies - galaxies: cluster,: general - surveys
Abstract:
We present the B, V, and K band surface photometry catalogs obtained
by running the automatic software GASPHOT on galaxies from the WINGS
cluster survey with isophotal areas larger than 200 pixels.
The luminosity growth curves of stars and galaxies in a given catalog
relative to a given cluster image were obtained simultaneously by
slicing the image with a fixed surface brightness step in several
SExtractor runs. Then, using a single Sersic law convolved with a
space-varying point spread function (PSF), GASPHOT performed a
simultaneous χ2 best-fit of the major- and minor-axis luminosity
growth curves of galaxies. We outline the GASPHOT performances and
compare our surface photometry with that obtained by SExtractor,
GALFIT, and GIM2D. This analysis is aimed at providing statistical
information about the accuracy that is generally achieved by the
softwares for automatic surface photometry of galaxies.
Description:
Surface photometry parameters are given for the 42275 galaxies
analyzed by GASPHOT in the V images of the WINGS survey of local
clusters of galaxies, for the 41463 galaxies in the B images and for
the 71687 galaxies in the K images. For each galaxy we give the WINGS
ID, the equatorial coordinates, the total magnitude (V, B and K
respectively), the effective radius along the major axis, the Sersic
index, the axial ratio (b/a) and a quality flag.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
gasphotv.dat 80 42275 Photometric parameters for 42275 galaxies in the
V images
gasphotb.dat 80 41463 Photometric parameters for 41463 galaxies in the
B images
gasphotk.dat 80 71687 Photometric parameters for 71687 galaxies in the
K images
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See also:
J/A+A/470/39 : Substructures in WINGS clusters (Ramella+, 2007)
J/A+A/495/707 : WINGS spectroscopy of 48 galaxy clusters (Cava+, 2009)
J/A+A/497/667 : WINGS: deep optical phot. of nearby clusters (Varela+, 2009)
J/A+A/501/851 : WINGS JK phot. of 28 galaxy clusters (Valentinuzzi+, 2009)
J/A+A/526/A45 : WINGS-SPE II catalog (Fritz+, 2011)
J/MNRAS/420/926 : Morphology of galaxies in WINGS clusters (Fasano+, 2012)
J/A+A/561/A111 : U-band photometry of 17 WINGS clusters (Omizzolo+, 2014)
Byte-by-byte Description of file: gasphot?.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [WINGS]
6- 24 A19 --- WINGS WINGS ID (JHHMMSS.ss+DDMMSS.s)
27- 37 F11.7 deg RAdeg Right ascension (J2000.0)
39- 49 F11.7 deg DEdeg Declination (J2000.0)
52- 56 F5.2 mag mag Total B, K or V magnitude
58- 63 F6.2 arcsec re Effective radius (major axis)
66- 70 F5.2 --- n Sersic index
73- 77 F5.2 --- b/a Axial ratio
79- 80 I2 --- qf [0/63] Gasphot quality flag (1)
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Note (1): Gasphot flag must be converted into binary and is set to 1 when the
solution is extreme (i.e. Sersic index = 0.5 or 8), and when the errors in
the estimated parameters (magnitude, effective radius, sersic index,
background and axial ratio exceed the 98 percentile of the error
distributions. Therefore, for example, it is 0 for good fits,
32 for fits that find extreme solutions (i.e. Sersic index = 0.5 or 8),
2 for fits with too large error on the background estimation,
16 for fits with too large error on the estimated magnitude.
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Acknowledgements:
Alessia Moretti, alessia.moretti(at) unipd.it
(End) Alessia Moretti [Padua Univ., Italy], Patricia Vannier [CDS] 13-Oct-2014