J/A+A/513/A15 Heidelberg InfraRed Optical Cluster Survey, HIROCS (Roeser+, 2010)
The Heidelberg InfraRed Optical Cluster Survey (HIROCS). I. Layout, instrumentation, and data analysis. Roeser H.-J., Hippelein H., Wolf C., Zatloukal M., Falter S. <Astron. Astrophys., 513, A15-15 (2010)> =2010A&A...513A..15R
ADC_Keywords: Surveys ; Clusters, galaxy ; Redshifts Keywords: galaxies: clusters: general - surveys - methods: data analysis Abstract: We describe a survey for distant clusters of galaxies that identified clusters as local overdensities in the 3D galaxy distribution. Optical and near-IR imaging in B, R, i, z, and H are used to derive photometric redshifts for objects as faint as m*+1 at a redshift of 1.5. We outline the astrometric and photometric data reduction. The 3D cluster search, based on the photometric redshifts, is described. Description: Optical data in B, R, i, and z were collected with LAICA at the prime-focus of the Calar Alto 3.5 m-telescope. In addition, we used the Wide-Field-Imager (WFI) at the 2.2 m-telescope on La Silla during MPG-time to obtain B and R images. Observations started in July 2002 with LAICA, in December 2002 with WFI, and in September 2003 with OMEGA2000. By August 2008, data collection was complete. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 66 114 Cluster candidates
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 3 I3 --- Seq Sequential number (1) 5- 11 F7.1 pix Xpos X position (2) 13- 19 F7.1 pix Ypos Y position (2) 21- 22 I2 h RAh Right ascension (
J2000) 24- 25 I2 min RAm Right ascension ( J2000) 27- 30 F4.1 s RAs Right ascension ( J2000) 32 A1 --- DE- Declination sign ( J2000) 33- 34 I2 deg DEd Declination ( J2000) 36- 37 I2 arcmin DEm Declination ( J2000) 39- 40 I2 arcsec DEs Declination ( J2000) 42- 46 F5.3 --- <z> Average photometric redshift 48- 50 I3 --- Ngal Number of member galaxies in the cluster 52- 56 F5.1 mag VMAG Total rest-frame absolute V magnitude 58- 60 I3 --- Ngal2 Number of galaxies in the cluster for ez≤0.15 62- 66 F5.3 --- <z>2 ? Average photometric redshift for ez≤0.15
Note (1): Table made of 3 parts: * The first part of the table lists those candidates (78) which have six or more member galaxies for the restricted photometric redshift errors. * The second part gives those candidates (32) who fall below the limit of 6 members in the restricted sample. * The third section gives those candidates (4) who do not have any member galaxy with a photometric redshift error less than 0.15. Note (2): The gnomonic positions X and Y refer to the pointing centre of (J2000) 03:06:12.48-00:20:38.
History: From electronic version of A&A.
(End) Patricia Vannier [CDS] 16-Jul-2010
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