J/AJ/126/2740 X-ray emission of RASS Abell clusters (Ledlow+, 2003)
The X-ray properties of nearby Abell clusters from the ROSAT All-Sky Survey: the sample and correlations with optical properties. Ledlow M.J., Voges W., Owen F.N., Burns J.O. <Astron. J., 126, 2740-2751 (2003)> =2003AJ....126.2740L
ADC_Keywords: Surveys ; Clusters, galaxy ; X-ray sources Keywords: catalogs - galaxies: clusters: general - surveys - X-rays Abstract: We present an analysis of the X-ray emission for a complete sample of 288 Abell clusters spanning the redshift range 0.016≤z≤0.09 from the ROSAT All-Sky Survey. This sample is based on our 20cm VLA survey of nearby Abell clusters. We find an X-ray detection rate of 83%. We report cluster X-ray fluxes and luminosities and two different flux ratios indicative of the concentration and extent of the emission. We examine correlations between the X-ray luminosity, Abell richness, and Bautz-Morgan and Rood-Sastry cluster morphologies. We find a strong correlation between LX and cluster richness coupled with a dependence on the optical morphological type. These results are consistent with the observed scatter between X-ray luminosity and temperature and a large fraction of cooling flows. For each cluster field, we also report the positions, peak X-ray fluxes, and flux ratios of all X-ray peaks above 3σ significance within a box of 2x2(h75)-1Mpc centered on Abell's position. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 86 579 X-ray Properties of Nearby Abell Cluster Sample table2.dat 57 856 X-ray Peaks and Optical identifications
See also: IX/10 : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 5 A5 --- Abell Abell cluster identification 7 A1 --- f_Abell [*4] Flag on Abell (1) 9- 14 F6.4 --- z Redshift 16- 19 I4 --- Exp Mean RASS exposure time 21- 22 I2 h RAh Hour of Right Ascension (J2000) 24- 25 I2 min RAm Minute of Right Ascension (J2000) 27- 30 F4.1 s RAs Second of Right Ascension (J2000) 32 A1 --- DE- Sign of the Declination (J2000) 33- 34 I2 deg DEd Degree of Declination (J2000) 36- 37 I2 arcmin DEm Arcminute of Declination (J2000) 39- 40 I2 arcsec DEs Arcsecond of Declination (J2000) 42- 44 I3 kpc Off ? Offset X-ray peak projected distance from Abell's position (2) 46 A1 --- l_FX Limit flag on FX 47- 51 F5.2 10-15W/m2 FX ? Peak X-ray flux (10-12erg/s/cm2) within a 500(h75)-1kpc aperture 53- 56 F4.2 10-15W/m2 e_FX ? Error in FX 58 A1 --- l_LX Limit flag on LX 59- 63 F5.2 10+36W LX Luminosity in units of 10^43^erg/s (3) 65- 68 F4.2 10+36W e_LX ? Error in LX 70- 73 F4.1 --- F500 ? The 500/62.5(h75)-1kpc aperture flux ratio 75- 79 F5.1 --- S/N ? Signal to noise (4) 81- 85 F5.1 --- S/Nmax ? Maximum signal to noise
Note (1): Note on Name * = There is a pointed ROSAT PSPC observation (including serendipidous) ≤0.3° of Abell's position 4 = A2122 and A2124 form a bimodal cluster-pair at the same redshift Note (2): A Null value indicates that the position, LX, e_LX, and S/N are for the entire cluster. Offsets indicate the other values are for the X-ray peak. Note (3): Within a 500(h75)-1kpc and assuming H0=75 and q0=0.5. When Off = Null, this is the total cluster luminosity centered on Abell's position. Note (4): When Off is blank, this is the total S/N within the aperture.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 5 A5 --- Abell Abell cluster identification 7- 8 I2 h RAh Hour of Right Ascension (J2000) 10- 11 I2 min RAm Minute of Right Ascension (J2000) 13- 16 F4.1 s RAs Second of Right Ascension (J2000) 18 A1 --- DE- Sign of the Declination (J2000) 19- 20 I2 deg DEd Degree of Declination (J2000) 22- 23 I2 arcmin DEm Arcminute of Declination (J2000) 25- 26 I2 arcsec DEs Arcsecond of Declination (J2000) 28- 31 I4 arcsec Off X-ray peak projected distance from Abell's position 33- 37 F5.2 10-4ct/s/pix PFlux Peak flux in units of 10-4counts/s/pixel 39- 42 F4.1 --- F250 The 250/62.5(1/h75)kpc aperture flux ratio 44- 48 F5.1 --- S/N Significance of the detection 50- 55 A6 --- Note Cluster emission code (1)
Note (1): Cluster emission code: C = identified the peak with the cluster emission; M = cluster emission appears bimodal or multimodal.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 12-Jan-2004
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