J/ApJ/519/533 ROSAT observations of ACO clusters (David+, 1999)
ROSAT PSPC observations of the richest (R≥2) ACO clusters
David L.P., Forman W., Jones C.
<Astrophys. J. 519, 533 (1999)>
=1999ApJ...519..533D 1999ApJ...519..533D
ADC_Keywords: Clusters, galaxy ; Galaxy catalogs ; X-ray sources
Mission_Name: ROSAT
Keywords: catalogs - galaxies: clusters: general - surveys - X-rays: galaxies
Abstract:
We have compiled an X-ray catalog of optically selected rich clusters
of galaxies observed by the Position Sensitive Proportional Counter
(PSPC) during the pointed GO phase of the ROSAT mission. This paper
contains a systematic X-ray analysis of 150 clusters with an optical
richness classification of R≥2 from the Abell, Corwin, & Olowin
(1989; ACO) catalog. All clusters were observed within 45' of the
optical axis of the telescope during pointed PSPC observations. For
each cluster, we calculate: the net 0.5-2.0keV PSPC count rate (or
4σ upper limit) in a 1Mpc radius aperture, 0.5-2.0keV flux
and luminosity, bolometric luminosity, and X-ray centroid. The cluster
sample is then used to examine correlations between the X-ray and
optical properties of clusters, derive the X-ray luminosity function
of clusters with different optical classifications, and obtain a
quantitative estimate of contamination (i.e., the fraction of clusters
with an optical richness significantly overestimated due to
interloping galaxies) in the ACO catalog.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 111 153 ROSAT PSPC ACO Cluster sample
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See also:
VII/110 : Rich Clusters of Galaxies (Abell+ 1989)
J/A+A/278/379 : X-ray Emission from Abell Clusters of Galaxies (Briel+ 1993)
J/ApJS/56/403 : X-ray survey of clusters of galaxies. IV. (Kowalski+, 1984)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- ACO Abell, Corwin & Olowin (1989, Cat. VII/110)
Cluster name
12- 13 I2 h RAh ? Right Ascension (J2000) of X-ray centroid
15- 16 I2 min RAm ? Right Ascension (J2000) of X-ray centroid
18- 21 F4.1 s RAs ? Right Ascension (J2000) of X-ray centroid
24 A1 --- DE- ? Declination (J2000) of X-ray centroid
25- 26 I2 deg DEd ? Declination (J2000) of X-ray centroid
28- 29 I2 arcmin DEm ? Declination (J2000) of X-ray centroid
31- 34 F4.1 arcsec DEs ? Declination (J2000) of X-ray centroid
36- 38 I3 --- Ngal Number of cluster members
40- 47 A8 --- BMType Bautz-Morgan type
51- 55 F5.3 --- z Redshift
57 A1 --- f_z [z] Indicates redshifts estimated by the
method in Ebeling+ (1998MNRAS.301..881E 1998MNRAS.301..881E)
59 I1 --- f_ACO [1,2] Indicates type of observation (1)
61- 65 I5 s Time Screened integration time
67 A1 --- l_CtRate Limit flag on CtRate
68- 74 F7.4 ct/s CtRate PSPC count rate or 4σ upper limit
from 0.5-2keV
76- 81 F6.4 ct/s e_CtRate Uncertainty (1σ) in CtRate
83 A1 --- l_UFlux Limit flag on UFlux
84- 91 E8.2 mW/m2 UFlux Unabsorbed X-ray flux from 0.5-2keV
(ergs/cm2/s)
93 A1 --- l_Lum Limit flag on Lum
94-101 E8.3 10-7W Lum Rest-frame X-ray luminosity from 0.5-2keV
in ergs/s (2)
103 A1 --- l_Lbol Limit flag on Bolo
104-111 E8.3 10-7W Lbol Rest-frame Bolometric luminosity in ergs/s (2)
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Note (1):
1 = cluster was part of a targeted observation
2 = was observed serendipitously
Note (2): All distance-dependent quantities are computed assuming
H0=50km/s/Mpc and q0=0.5.
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History:
From ApJ electronic edition
References:
Abell, G. O., Corwin, H. G., & Olowin, R. P. 1989, ApJS, 70, 1
(1989ApJS...70....1A 1989ApJS...70....1A, Cat. VII/110)
Ebeling, H., Edge, A. C., Boehringer, H., Allen, S. W., Crawford,
C. S., Fabian, A. C., Voges, W., & Huchra, J. P. 1998, MNRAS,
301, 881 (1998MNRAS.301..881E 1998MNRAS.301..881E, Cat. J/MNRAS/301/881)
(End) Greg Schwarz [AAS] 08-Mar-2000