2014A&A...572A..87D


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.14CEST19:09:36

2014A&A...572A..87D - Astronomy and Astrophysics, volume 572A, 87-87 (2014/12-1)

Surface photometry of 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. and VARELA J.

Abstract (from CDS):

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 catalogs can be downloaded at the Centre de Donnees Astronomiques de Strasbourg. 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. The GASPHOT catalogs provide the parameters of the Sersic law that fit the luminosity profiles for each galaxy and for each photometric band. They are the sky coordinates of the galaxy center (RA, Dec), the total magnitude (m), the semi-major axis of the effective isophote (Re), the Sersic index (n), the axis ratio (b/a), and a flag parameter (QFLAG) that generally indicates the fit quality. The WINGS-GASPHOT database includes 41463 galaxies in the B band, 42275 in the V band, and 71687 in the K band. The bright early-type galaxies have higher Sersic indices and larger effective radii, as well as redder colors in their center. In general, the effective radii increase systematically from the K to the V and B band. The GASPHOT photometry agrees well with the surface photometry obtained by GALFIT and GIM2D, and with the aperture photometry provided by SExtractor. In particular, the direct comparison of structural parameters derived by different softwares for common galaxies indicates that the systematic differences are small in general. The only significant deviations are most likely due to the peculiar (and very accurate) image processing adopted by WINGS for large galaxies. The main advantages of GASPHOT with respect to other tools are (i) the automatic finding of the local PSF; (ii) the short CPU execution time; and (iii) the remarkable stability against the choice of the initial-guess parameters. All these characteristics make GASPHOT an ideal tool for blind surface photometry of large galaxy samples in wide-field CCD mosaics.

Abstract Copyright:

Journal keyword(s): catalogs - galaxies: clusters: general - surveys

VizieR on-line data: <Available at CDS (J/A+A/572/A87): gasphotv.dat gasphotb.dat gasphotk.dat>

Status at CDS:   All or part of tables of objects could be ingested in SIMBAD with priority 2.

Simbad objects: 27

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Number of rows : 27

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 ACO 87 ClG 00 43 01 -09 47.6           ~ 45 0
2 ACO 119 ClG 00 56 16.8 -01 15 00           ~ 517 2
3 ACO 370 ClG 02 39 50.5 -01 35 08           ~ 639 0
4 ACO 500 ClG 04 38 55.0 -22 05 55           ~ 77 0
5 ACO 550 ClG 05 52 38 -21 04.4           ~ 42 0
6 ACO 602 ClG 07 53 24.2 +29 21 58           ~ 63 0
7 ACO 957 ClG 10 13 38.42 -00 55 32.6           ~ 192 2
8 MCXC J1022.0+3830 ClG 10 22 04.7 +38 30 43           ~ 45 0
9 ACO 1069 ClG 10 39 54.3 -08 36 40           ~ 106 1
10 ACO 1291 ClG 11 32 11.20 +56 01 31.3           ~ 129 0
11 ACO 1631 ClG 12 52 50.6 -15 25 37           ~ 164 1
12 ACO 1644 ClG 12 57 11.6 -17 24 34           ~ 332 1
13 ACO 1795 ClG 13 49 00.5 +26 35 07           ~ 1154 0
14 ACO 1831 ClG 13 59 10.2 +27 59 28           ~ 139 0
15 ACO 1983 ClG 14 52 44.0 +16 44 46           ~ 235 1
16 NAME NGC 5920 Group ClG 15 21 50.7 +07 42 18     15.13     ~ 287 0
17 ACO 2107 ClG 15 39 47.9 +21 46 21           ~ 233 0
18 ACO 2124 ClG 15 44 59.3 +36 03 40           ~ 191 0
19 ACO 2149 ClG 16 01 22.97 +53 51 59.1           ~ 65 0
20 ACO 2169 ClG 16 14 02.75 +49 12 30.7           ~ 57 0
21 BAX 265.1346+35.6492 ClG 17 40 32.7 +35 38 51           ~ 31 0
22 ZwCl 1810+4949 ClG 18 11 00.1 +49 54 40     14.8     ~ 48 0
23 ZW II 108 BiC 21 13 55.918 +02 33 55.39   15.1       ~ 49 1
24 ACO 2382 ClG 21 51 57.2984 -15 36 48.067           ~ 111 0
25 ACO 2399 ClG 21 57 27.64 -07 48 12.9           ~ 163 0
26 ACO 2457 ClG 22 35 40.30 +01 31 33.6           ~ 120 0
27 ACO 2589 ClG 23 24 00.5 +16 49 29           ~ 297 1

    Equat.    Gal    SGal    Ecl

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2020.07.14-19:09:36

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