J/MNRAS/416/2840 The 2M++ galaxy redshift catalogue (Lavaux+, 2011)
The 2M++ galaxy redshift catalogue. Lavaux G., Hudson M.J. <Mon. Not. R. Astron. Soc., 416, 2840-2856 (2011)> =2011MNRAS.416.2840L
ADC_Keywords: Galaxy catalogs ; Infrared sources ; Redshifts Keywords: methods: data analysis - methods: numerical - methods: observational - catalogues - galaxies: luminosity function, mass function - large-scale structure of Universe Abstract: Peculiar velocities arise from gravitational instability, and thus are linked to the surrounding distribution of matter. In order to understand the motion of the Local Group with respect to the cosmic microwave background, a deep all-sky map of the galaxy distribution is required. Here we present a new redshift compilation of 69160 galaxies, dubbed 2M++, to map large-scale structures of the local Universe over nearly the whole sky, and reaching depths of K≤12.5, or 200h-1Mpc. The target catalogue is based on the Two-Micron All-Sky Survey Extended Source Catalog (2MASS-XSC). The primary sources of redshifts are the 2MASS Redshift Survey, the 6dF galaxy redshift survey and the Sloan Digital Sky Survey (Data Release 7). We assess redshift completeness in each region and compute the weights required to correct for redshift incompleteness and apparent magnitude limits, and discuss corrections for incompleteness in the zone of avoidance. We present the density field for this survey, and discuss the importance of large-scale structures such as the Shapley Concentration. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file catalog.dat 140 72973 *The 2M++ catalogue group.dat 64 4002 The 2M++ group catalogue
Note on catalog.dat: Number of real galaxies = 69160; Number of fake galaxies in ZoA = 3813; Number of groups = 4002.
See also: VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006) VII/249 : 6dF-DR2 Galaxy Survey (Jones+, 2005) II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009) VII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010) http://www.sdss.org : SDSS Home Page Byte-by-byte Description of file: catalog.dat
Bytes Format Units Label Explanations
3- 18 A16 --- Name Name of the galaxy as given in the 2MASS-XSC database (Cat. VII/233), or ZOA fake galaxy 20- 25 F6.2 deg RAdeg Right Ascension in decimal degrees (J2000) 27- 32 F6.2 deg DEdeg Declination in decimal degrees (J2000) 34- 39 F6.2 deg GLON [0/360] Galactic longitude 41- 46 F6.2 deg GLAT Galactic latitude 48- 52 F5.2 mag Ksmag Apparent magnitude in band K_S as defined in Section 2.2. 55- 59 I5 km/s HV Heliocentric total apparent velocity 62- 66 I5 km/s Vcmb Total apparent velocity in CMB rest frame (G1) 68- 73 I6 km/s e_HV ?=0 Total apparent velocity error (equal to zero if not measured) 77- 80 I4 --- GID ? Unique group identifier obtained from the algorithm of Section 4. 84- 87 F4.2 --- c11.5 Redshift incompleteness at magnitude K2M++≤11.5 91- 94 F4.2 --- c12.5 ? Redshift incompleteness at magnitude KM2++≤12.5 (2) 99 I1 --- ZoA [0/1] Flag to indicate whether this is is a fake galaxy to fill the zone of avoidance following the algorithm of Section 3. 104 I1 --- Cln [0/1] Flag to indicate if the redshift has been obtained by the cloning procedure of Section 2.3. 109 I1 --- M0 [0/1] Flag to indicate whether this galaxy lies in the exclusive region covered by the 2MRS target mask (2Mx6S region) 114 I1 --- M1 [0/1] Flag to indicate whether this galaxy lies in the non-exclusion region covered by the SDSS 119 I1 --- M2 [0/1] Flag to indicate whether this galaxy lies in the non-exclusion region covered by the 6dFGRS 122-140 A19 --- Ref Reference bibcode ("zoa" for fake galaxies in the Zone of Avoidance)
Note (2): It may be empty in that case the catalogue is limited to K2M++≤11.5 in the portion of the sky holding the galaxy.
Byte-by-byte Description of file: group.dat
Bytes Format Units Label Explanations
7- 10 I4 --- GID Group identifier in the catalogue 12- 17 F6.2 deg GLON Galactic longitude 19- 24 F6.2 deg GLAT Galactic latitude 27- 31 F5.2 mag K2mag Apparent magnitude K2M++ (1) 40- 42 I3 --- Rich Richness uncorrected for incompleteness effect 45- 49 I5 km/s HV Heliocentric total apparent velocity 52- 56 I5 km/s Vcmb Total apparent velocity in CMB rest frame (G1) 62- 64 I3 km/s sigma Velocity dispersion in the group
Note (1): We define as K2M++ (K2mag) the magnitude of a galaxy measured in the KS band, within the circular isophote at 20mag/arcsec2, after various corrections described in Section 2.2. The magnitude is derived from the 2M++ galaxies. This is a magnitude uncorrected for incompleteness effect.
Global notes: Note (G1): using relation from Kogut et al. (1993ApJ...419....1K) and Tully et al. (2008, Cat. J/ApJ/676/184)
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 17-Apr-2012
|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|