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Detailed Description of J/ApJ/519/533 : ROSAT observations of ACO clusters (David+, 1999)
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Note : this is the description file of the original catalog.
This HTML page corresponds well to the original description, but some minor
changes in the format may have been introduced in the FITS output
files in order to allow for arithmetic operations on quantities
such as coordinates and times. h:m:s and d:m:s units are normally
converted into degrees, and YYYY-MM-DD into julian days.
Similarly, some slight changes may have been introduced in the
units; the value given in the HTML files supersedes the value indicated in the ReadMe
file for this catalogue.
J/ApJ/519/533 ROSAT observations of ACO clusters (David+, 1999)
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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
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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
4{sigma} 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:
FileName Lrecl Records Explanations
× 80 . This file
× ReadMe 80 . This file
× table1.dat 111 153 ROSAT PSPC ACO Cluster sample
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
Bytes Format Units Label Explanations
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)
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 4{sigma} upper limit
from 0.5-2keV
76- 81 F6.4 ct/s e_CtRate Uncertainty (1{sigma}) 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)
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.
History:
From ApJ electronic edition
References:
Abell, G. O., Corwin, H. G., & Olowin, R. P. 1989, ApJS, 70, 1
(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, Cat. J/MNRAS/301/881)
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(End) Greg Schwarz [AAS] 08-Mar-2000