J/ApJS/202/2       VLA 1.4GHz observations of A370 and A2390       (Wold+, 2012)

Very Large Array 1.4 GHz catalogs of the A370 and A2390 cluster fields. Wold I.G.B., Owen F.N., Wang W.-H., Barger A.J., Keenan R.C. <Astrophys. J. Suppl. Ser., 202, 2 (2012)> =2012ApJS..202....2W 2012ApJS..202....2W
ADC_Keywords: Clusters, galaxy ; Galaxies, radio ; Redshifts ; Radio continuum Keywords: cosmology: observations Abstract: We present 1.4GHz catalogs for the cluster fields A370 and A2390 observed with the Very Large Array. These are two of the deepest radio images of cluster fields ever taken. The A370 image covers an area of 40'x40' with a synthesized beam of ∼1.7" and a noise level of ∼5.7uJy near the field center. The A2390 image covers an area of 34'x34' with a synthesized beam of ∼1.4" and a noise level of ∼5.6uJy near the field center. We catalog 200 redshifts for the A370 field. We construct differential number counts for the central regions (radius <16') of both clusters. We find that the faint (S1.4GHz<3mJy) counts of A370 are roughly consistent with the highest blank field number counts, while the faint number counts of A2390 are roughly consistent with the lowest blank field number counts. Our analyses indicate that the number counts are primarily from field radio galaxies. We suggest that the disagreement of our number counts can be largely attributed to cosmic variance. Description: We observed the A370 cluster field with the Very Large Array (VLA) in the A configuration for ∼42.4hr on-source during 1999 August and September. K. S. Dwarakanath observed A370 in the B configuration for ∼18.4hr on-source during 1994 August and September. The field center is located at 02:39:32 -01:35:07 (J2000). This is offset by approximately 5 arcmin from the cluster center at 02:39:50.5 -01:35:08. We also targeted 58 radio sources, in A370, without existing spectral data using the Hydra fiber spectrograph on the Wisconsin-Indiana-Yale-NOAO (WIYN) telescope (spectral window of ∼4500-9500Å). We preferentially targeted optically bright galaxies. We observed these data with a single two hour pointing on 2012 January 20. Of the 58 targets, we obtained high-confidence redshifts for 36. We observed the A2390 cluster field with the VLA in the A configuration for ∼31.4hr on-source during 2008 October. Field center is located at 21:53:36 +17:41:52 in J2000 coordinates. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table2.dat 101 1223 Radio source catalog -------------------------------------------------------------------------------- See also: VIII/65 : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998) VIII/71 : The FIRST Survey Catalog, Version 03Apr11 (Becker+ 2003) J/ApJS/188/280 : Spectroscopic catalog in 24 clusters (Stern+, 2010) J/MNRAS/397/281 : Radio imaging in Lockman Hole (Ibar+, 2009) J/MNRAS/371/963 : Deep VLA survey (Biggs+, 2006) J/MNRAS/372/741 : SXDF 100µJy catalogue (Simpson+, 2006) J/MNRAS/358/233 : UBIc photometry of ACO2390 early-type galaxies (Fritz+, 2005) J/A+A/407/791 : ACO 370, 2218 and 2390 fluxes at 7 and 15um (Metcalfe+, 2003) J/AJ/126/119 : Optical and radio data for rich Abell clusters (Rizza+, 2003) J/ApJ/533/611 : 1.4GHz survey in HDF region (Richards+, 2000) J/ApJS/122/51 : Catalog of rich galaxy clusters (Dressler+ 1999) J/MNRAS/238/1171 : Opt/IR observ. of Radio Galaxies and QSOs (Dunlop+, 1989) Byte-by-byte Description of file: table2.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 4 I4 --- ACO [370/2390] Abell Field (370 or 2390) 6- 8 I3 --- Seq [0/698] Catalog Source Number 10- 11 I2 h RAh Hour of Right Ascension (J2000) 13- 14 I2 min RAm Minute of Right Ascension (J2000) 16- 20 F5.2 s RAs Second of Right Ascension (J2000) 22- 26 F5.3 s e_RAs Error in RAs 28 A1 --- DE- Declination sign (J2000) 29- 30 I2 deg DEd Degree of Declination (J2000) 32- 33 I2 arcmin DEm Arcminute of Declination (J2000) 35- 39 F5.2 arcsec DEs Arcsecond of Declination (J2000) 41- 44 F4.2 arcsec e_DEs Error in DEs 46- 52 F7.1 --- S/N [3.5/57452.3] Peak Signal/Noise Ratio 54- 61 F8.1 uJy Stot [24.5/717950] Total flux density at 1.4GHz 63- 69 F7.1 uJy e_Stot Error in Stot 71- 74 F4.1 arcsec bmaj [0.5/89.2]? Fitted Deconvolved Gaussian major axis FWHM 76- 79 F4.1 arcsec bmin [0/22.3]? Fitted Deconvolved Gaussian minor axis FWHM 81- 83 I3 deg PA ? Fitted position angle 85- 88 F4.1 arcsec ulim [0.2/14.8]? bmaj-upper limit for unresolved sources (1) 90- 92 F3.1 arcsec beam [1.4/6] Map beam size 94- 99 F6.4 --- z [0.0286/3.8219]? A370 only Spectroscopic redshift 101 I1 --- r_z [1/5]? A370 only Redshift reference (2) -------------------------------------------------------------------------------- Note (1): Or maximum size for very resolved sources. Note (2): References as follows: 1 = L. Cowie, private communication; 2 = F. Owen, private communication; 3 = Keenan et al. 2012, Submitted; 4 = Dunlop et al. 1989, Cat. J/MNRAS/238/1171; 5 = Wold et al. 2012, Cat. J/ApJS/202/2 (this paper). -------------------------------------------------------------------------------- History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 10-Oct-2012
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