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J/A+A/528/A36    u*g'r'i' photometry of A496 faint LSB galaxies   (Ulmer+, 2011)
A search for faint low surface brightness galaxies in the relaxed cluster
Abell 496.
    Ulmer M.P., Adami C., Durret F., Ilbert O., Guennou L.
   <Astron. Astrophys., 528, A36-36 (2011)>
   =2011A&A...528A..36U
ADC_Keywords: Clusters, galaxy ; Galaxies, photometry ; Redshifts

Keywords: galaxies: clusters: individual: Abell 496 -
          galaxies: luminosity function, mass function

Abstract:
    Cluster faint low surface brightness galaxies (fLSBs) are difficult to
    observe. Consequently, their origin, physical properties and number
    density are not well known. After a first search for fLSBs in the
    highly substructured Coma cluster, we present here a search for fLSBs
    in the nearly relaxed Abell 496 cluster.

    Abell 496 appears to be a much more relaxed cluster than Coma, but
    still embedded in a large scale filament of galaxies. Our aim is to
    compare the properties of fLSBs in these two very different clusters,
    to search for environmental effects.

Description:
    Based on deep CFHT/Megacam images in the u*, g', r' and i'
    bands, we selected galaxies with r'>21 and pmr'>24mag/arcsec2. We
    estimated photometric redshifts for all these galaxies and kept the
    142 fLSBs with photo-z <0.2.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
tablea.dat        71      142   Properties of the fLSBs with photo-z<0.2


See also:
   J/A+A/428/823 : HI catalog of low surface brightness galaxies (O'Neil+, 2004)


Byte-by-byte Description of file: tablea.dat

   Bytes Format Units   Label     Explanations

   1-  3  I3    ---     Seq       [1/142] Sequential number,
                                           [UAD2011] NNN in Simbad
   5- 11  F7.4  deg     RAdeg     Right ascension in decimal degrees (J2000)
  13- 20  F8.4  deg     DEdeg     Declination in decimal degrees (J2000)
  22- 26  F5.2  mag     u*mag     CFHT Megaprime/Megacam u* magnitude
  28- 31  F4.2  mag     e_u*mag   rms uncertainty on u*mag
  33- 37  F5.2  mag     g'mag     CFHT Megaprime/Megacam g' magnitude
  39- 43  F5.2  mag     e_g'mag   ?=-9.99 rms uncertainty on g'mag (1)
  45- 49  F5.2  mag     r'mag     CFHT Megaprime/Megacam r' magnitude
  51- 54  F4.2  mag     e_r'mag   rms uncertainty on r'mag
  56- 60  F5.2  mag     i'mag     CFHT Megaprime/Megacam i' magnitude
  62- 66  F5.2  mag     e_i'mag   ?=-9.99 rms uncertainty on i'mag (1)
  68- 71  F4.2  ---     zph       Photometric redshift

Note (1): Magnitude errors of -9.99 correspond to the fLSBs for which the
     brightness profile fit by a Gaussian did not converge (see Sect. 2.3).


History:
    From electronic version of the journal
(End)                                      Patricia Vannier [CDS]    23-Jul-2012