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J/ApJ/702/506      The Clowes-Campusano LQG Survey. I.       (Haberzettl+, 2009)

The Clowes-Campusano Large Quasar Group Survey. I. GALEX selected sample of Lyman break galaxies at z∼1. Haberzettl L., Williger G.M., Lauroesch J.T., Haines C.P., Valls-Gabaud D., Harris K.A., Koekemoer A.M., Loveday J., Campusano L.E., Clowes R.G., Dave R., Graham M.J., Sochting I.K. <Astrophys. J., 702, 506-522 (2009)> =2009ApJ...702..506H
ADC_Keywords: Galaxies, optical ; Redshifts ; Surveys ; Ultraviolet ; Photometry, SDSS Keywords: galaxies: distances and redshifts - galaxies: evolution - large-scale structure of universe - quasars: general Abstract: The nature of galaxy structures on large scales is a key observational prediction for current models of galaxy formation. The Sloan Digital Sky Survey (SDSS) and the 2dF galaxy survey have revealed a number of structures on 40-150h-1Mpc scales at low redshifts, and some even larger ones. To constrain galaxy number densities, luminosities, and stellar populations in large structures at higher redshift, we have investigated two sheet-like structures of galaxies at z=0.8 and 1.3 spanning 150h-1 comoving Mpc embedded in large quasar groups (LQGs) extending over at least 200h-1Mpc. We present first results of an analysis of these sheet-like structures using two contiguous 1° Galaxy Evolution Explorer (GALEX) fields (FUV and NUV) cross-correlated with optical data from the SDSS. We derive a sample of 462 Lyman break galaxy (LBG) candidates coincident with the sheets. Using the GALEX and SDSS data, we show that the overall average spectral energy distribution of a LBG galaxy at z∼1 is flat (in fλ) in the rest-frame wavelength range from 1500Å to 4000Å, implying evolved populations of stars in the LBGs. From the luminosity functions we get indications for overdensities in the two LQGs compared to their foreground regions. Description: We observed part of the Clowes-Campusano Large Quasar Group (CCLQG), it contains at least 18 bright quasars at 1.2<z<1.5 and a spatial overdensity of 3 for BJ≤20.0mag (Clowes & Campusano 1991, Cat. J/MNRAS/249/218). The CCLQG covers ∼2.5degx5deg (∼120x240h-2Mpc2) and is 590h-1Mpc deep. For this study we have imaged two slightly overlapping 1.2deg fields within the CCLQG in the far-UV (λeff=1538.6Å) and near-UV (λeff=2315.7Å) filter bands, using the UV satellite GALEX (Galaxy Evolution Explorer). The observations were part of the Guest Investigator program, cycle 1 (October 2004 - September 2005) proposal 35. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 145 462 *Lyman break galaxy (LBG) candidates
Note on table2.dat: the list includes all all the objects selected following the selection criteria of Burgarella et al. 2006A&A...450...69B plus the criteria described in Sect. 2.3 and Fig. 2.; there is therefore a high stellar contamination, especially for the brightest part (mag. 9-16)
See also: VII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010) II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009) J/A+A/533/A142 : UV-to-IR fluxes of Hickson compact groups (Bitsakis+, 2011) J/MNRAS/403/683 : GALEX Arecibo SDSS survey (GASS) (Catinella+, 2010) J/ApJ/697/1410 : Lyman break galaxies at z∼1.8-2.8 (Ly+, 2009) J/MNRAS/392/19 : The 2dF-SDSS QSO survey (Croom+, 2009) J/MNRAS/380/986 : Lyman-break galaxies from GALEX (Burgarella+, 2007) J/AJ/133/1780 : GALEX/SDSS quasar catalog (Trammell+, 2007) J/MNRAS/249/218 : Group of quasars (Clowes+, 1991) : SDSS web site Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 4 A4 --- --- [LQG_] 5- 17 A13 --- [HWL2009] Object identification (<[HWL2009] LQG JHHMMSS+DDMMSS> in Simbad) 19- 20 I2 h RAh Hour of Right Ascension (J2000) 22- 23 I2 min RAm Minute of Right Ascension (J2000) 25- 29 F5.2 s RAs Second of Right Ascension (J2000) 31 A1 --- DE- Sign of Declination (J2000) 32 I1 deg DEd Degree of Declination (J2000) 34- 35 I2 arcmin DEm Arcminute of Declination (J2000) 37- 41 F5.2 arcsec DEs Arcsecond of Declination (J2000) 43- 48 F6.3 mag FUVmag ?=99 GALEX FUV band (1538.6Å) magnitude 50- 55 F6.3 mag e_FUVmag ?=99 Error in FUVmag 57- 62 F6.3 mag NUVmag GALEX NUV band (2315.7Å) magnitude 64- 68 F5.3 mag e_NUVmag Error in NUVmag 70- 75 F6.3 mag umag SDSS-DR5 u band magnitude 77- 81 F5.3 mag e_umag Error in umag 83- 88 F6.3 mag gmag SDSS-DR5 g band magnitude 90- 94 F5.3 mag e_gmag Error in gmag 96-101 F6.3 mag rmag SDSS-DR5 r band magnitude 103-107 F5.3 mag e_rmag Error in rmag 109-114 F6.3 mag imag SDSS-DR5 i band magnitude 116-120 F5.3 mag e_imag Error in imag 122-127 F6.3 mag zmag SDSS-DR5 z band magnitude 129-133 F5.3 mag e_zmag Error in zmag 135-139 F5.3 --- z Photometric redshift 141-145 F5.3 --- e_z Error in z
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 30-Sep-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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