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J/AJ/137/4436       Coma cluster VLA survey                  (Miller+, 2009)

A deep Very Large Array radio continuum survey of the core and outskirts of the Coma cluster. Miller N.A., Hornschemeier A.E., Mobasher B. <Astron. J., 137, 4436-4449 (2009)> =2009AJ....137.4436M
ADC_Keywords: Clusters, galaxy ; Radio sources ; Photometry, SDSS Keywords: galaxies: clusters: general - galaxies: clusters: individual: Abell 1656 - radio continuum: galaxies Abstract: We present deep 1.4GHz Very Large Array radio continuum observations of two ∼0.5°2 fields in the Coma cluster of galaxies. The two fields, "Coma 1" and "Coma 3", correspond to the cluster core and southwest infall region and were selected on account of abundant preexisting multiwavelength data. In their most sensitive regions the radio data reach 22uJy rms per 4.4" beam, sufficient to detect (at 5σ) Coma member galaxies with L1.4GHz=1.3x1020W/Hz. The full catalog of radio detections is presented herein and consists of 1030 sources detected at ≥5σ, 628 of which are within the combined Coma 1 and Coma 3 area. We also provide optical identifications of the radio sources using data from the Sloan Digital Sky Survey. The depth of the radio observations allows us to detect active galactic nucleus in cluster elliptical galaxies with Mr←20.5 (AB magnitudes), including radio detections for all cluster ellipticals with Mr←21.8. At fainter optical magnitudes (-20.5<Mr~←19), the radio sources are associated with star-forming galaxies with star formation rates as low as 0.1M/yr. Description: The VLA observations were performed over five days in 2006 June as program code AM868. On each of the five days, the scheduled time was centered on the transit of Coma. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 99 1202 Radio source catalog table3.dat 96 499 Optical counterparts to radio sources table4.dat 96 78 Rejected optical counterparts to radio sources notes.dat 80 32 Notes coma1.fits 2880 23354 *1x1° VLA image of "Coma 1" (cluster core) centered at 12:59:45.2+27:57:53 (J2000) coma3.fits 2880 23354 *1x1° VLA image of "Coma 3" (southwest infall region) centered at 12:57:28.5+27:08:08 (J2000)
Note on coma1.fits, coma3.fits: 4096x4096 images with a pixel size of 1arcsec for a resolution (Gaussian FWHM of the synthesized beam) of 4.4".
See also: VII/42 : GMP catalogue: galaxies in the Coma cluster (Godwin+ 1983) J/A+AS/105/385 : Radio observations of Coma cluster I (Kim+ 1994) J/A+AS/105/403 : Radio observations of Coma cluster II (Kim 1994) J/A+AS/122/409 : Photometric catalogue of Coma (Lobo+, 1997) J/AJ/121/2331 : SDSS redshifts in the Coma cluster (Castander+, 2001) J/A+A/419/47 : XMM X-ray fluxes in Coma cluster (Finoguenov+, 2004) J/A+A/449/929 : HI observations of Coma Supercluster (Gavazzi+, 2006) J/A+A/451/1159 : BVRI imaging of the Coma cluster (Adami+, 2006) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 7 A7 --- ID Source identification (CNA-NNN, [MHM2009c] CNA-NNN in Simbad) 9- 10 I2 h RAh Hour of Right Ascension (J2000) (1) 12- 13 I2 min RAm Minute of Right Ascension (J2000) (1) 15- 19 F5.2 s RAs Second of Right Ascension (J2000) (1) 20 A1 --- DE- Sign of Declinqtion (J2000) (1) 21- 22 I2 deg DEd Degree of Declination (J2000) (1) 24- 25 I2 arcmin DEm Arcminute of Declination (J2000) (1) 27- 30 F4.1 arcsec DEs Arcsecond of Declination (J2000) (1) 32- 37 F6.1 --- S/N Signal-to-noise of fitted peak (2) 38 A1 --- f_S/N [bc] S/N close to sigma (3) 40- 45 I6 uJy Speak Peak flux density at 1.4GHz 47- 49 I3 uJy rms Local rms (4) 51- 56 I6 uJy Sint Integral flux density at 1.4GHz 58- 60 I3 uJy e_Sint Error in Sint 62 I1 --- Res? [0/1] Source resolved? (0=no, 1=yes) 64 A1 --- f_Res? [a] integral flux using TVSTAT (6) 66 I1 --- Edge? [0/1] Source within ∼2.5' of radio mosaic edge? (0=no, 1=yes) 68- 99 A32 --- Com An additional comment
Note (1): Of radio source fitted peak. Note (2): As determined by source identification algorithm (SAD) on S/N map (see text). Sources with 4.94<S/N<5.0 are listed as S/N=4.9 to clarify that they are not formally 5σ detections. Note (3): Flag on S/N as follows: b = Although the peak S/N<5 in the S/N map, the fitted value from JMFIT is above a 5σ detection. c = Although the peak S/N≥5 in the S/N map, the fitted value from JMFIT is below a 5σ detection. Note (4): As evaluated in a 5' square box centered on the source position (this is also the error associated with the peak flux density measurement). Note (6): Flag as follows: a = Extended source with integral flux and error determined in irregularly-shaped aperture using TVSTAT.
Byte-by-byte Description of file: table[34].dat
Bytes Format Units Label Explanations
1- 2 I2 h RAh Hour of Right Ascension (J2000) (1) 4- 5 I2 min RAm Minute of Right Ascension (J2000) (1) 7- 11 F5.2 s RAs Second of Right Ascension (J2000) (1) 12 A1 --- DE- Sign of declination (J2000) (1) 13- 14 I2 deg DEd Degree of Declination (J2000) (1) 16- 17 I2 arcmin DEm Arcminute of Declination (J2000) (1) 19- 22 F4.1 arcsec DEs Arcsecond of Declination (J2000) (1) 24- 27 F4.2 arcsec Sep ? Radio/SDSS optical counterpart separation 29- 34 F6.3 mag umag ? SDSS u band model magnitude 36- 41 F6.3 mag gmag ? SDSS g band model magnitude 43- 48 F6.3 mag rmag ? SDSS r band model magnitude 50- 55 F6.3 mag imag ? SDSS i band model magnitude 57- 62 F6.3 mag zmag ? SDSS z band model magnitude 64 I1 --- cl [3/6]? SDSS optical counterpart photometric class (3=galaxy, 6=star) 66- 72 A7 --- ID Radio identification from Table 2 74- 78 A5 --- Notes Notes, detailed in "notes.dat" file 80- 96 A17 --- Com Additional comments (3)
Note (1): Of SDSS optical counterpart. Note (3): Including NGC names for extended radio galaxies in the Coma cluster and related radio sources from Table 2
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1 A1 --- Note Note code 3- 80 A78 --- Text Text of the note
History: * 01-Nov-2011: From electronic version of the journal * 22-Mar-2013: FITS images kindly supplied by the author
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 01-Nov-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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