J/AJ/119/1562 gri photometry of 48 galaxy clusters (Margoniner+, 2000)
Photometric properties of 48 clusters of galaxies. I. The Butcher-Oemler effect
Margoniner V. E., de Carvalho R. R.
<Astron. J. 119, 1562 (2000)>
=2000AJ....119.1562M 2000AJ....119.1562M
ADC_Keywords: Clusters, galaxy ; Photometry, CCD
Keywords: galaxies: clusters: general - galaxies: evolution - galaxies:
fundamental parameters - galaxies: photometry
Abstract:
We present gri CCD photometry of 44 Abell clusters and four cluster
candidates. Twenty-one clusters in our sample have spectroscopic
redshifts. Fitting a relation between mean g, r, and i magnitudes and
redshift for this subsample, we have calculated photometric redshifts
for the remainder with an estimated accuracy of approximately 0.03.
The resulting redshift range for the sample is 0.03 < z < 0.38.
Color-magnitude diagrams are presented for the complete sample and
used to study evolution of the galaxy population in the cluster
environment.
Description:
We obtained CCD images of 48 clusters in four runs between 1997 March
and 1998 November. All data were taken with the Tek 2K-3 detector at
the Cassegrain focus of the 0.9 m telescope at the Cerro Tololo
Inter-American Observatory (CTIO). The CCD has 2048x2048 pixels, each
pixel covering 0.396'', corresponding to a field of approximately
13.5x13.5 or about 0.5-6.7 Mpc at z=0.03-0.38 (H0 = 67 km.s-1.Mpc-1).
We observed 44 Abell clusters and four cluster
candidates detected in POSS-II (Second Palomar Sky Survey; Gal et al.
2000AJ....119...12G 2000AJ....119...12G) photographic plates. The images were taken
through the g, r and i filters of the Thuan & Gunn
(1976PASP...88..543T 1976PASP...88..543T) photometric system, with effective wavelengths
and widths of 5118 and 900 Å for g, 6798 and 1000 Å for r, and
8100 and 1500 Å for i. The exposure times varied between 15-60
minutes in the g band, 10-20 minutes in the r band, and 10-15 minutes
in the i band.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 74 19492 Galaxy catalogs and gri photometry
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See also:
VII/110 : Rich Clusters of Galaxies (Abell+ 1989)
J/A+AS/103/245 : Gunn gri photometry of Clusters of Galaxies (Molinari+ 1994)
J/A+AS/119/391 : Gunn photometry of seven clusters of galaxies
(Molinari+ 1996)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Galaxy name
12- 15 I4 yr Obs.Y Year of observation
17- 19 A3 "month" Obs.M Month of observation
21- 22 I2 d Obs.D Day of observation
26- 27 I2 h RAh Right Ascension (J2000)
29- 30 I2 min RAm Right Ascension (J2000)
32- 36 F5.2 s RAs Right Ascension (J2000)
40 A1 --- DE- Sign of the Declination (J2000)
41 I1 deg DEd Declination (J2000)
43- 44 I2 arcmin DEm Declination (J2000)
46- 50 F5.2 arcsec DEs Declination (J2000)
54- 58 F5.2 mag gmag The g band aperture magnitude
62- 66 F5.2 mag rmag The r band aperture magnitude
70- 74 F5.2 mag imag The i band aperture magnitude
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History:
From AJ electronic edition
(End) Greg Schwarz [AAS] 18-Apr-2000