Content-Type: application/octet-stream

J/A+A/   Properties of Ly-alpha emitters around MRC 0316-257 (Venemans+ 2005)
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Properties of Ly-alpha emitters around the radio galaxy MRC 0316-257
   Venemans B.P., Rottgering H.J.A., Miley G.K., Kurk J.D., De Breuck C., 
   Overzier R.A., van Breugel W.J.M., Carilli C.L., Ford H., Heckman T., 
   Pentericci L., McCarthy P.
   <Astron. Astrophys.     (2005)>
   =2005A&A
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Keywords: Galaxies: active - Galaxies: high-redshift - Galaxies: evolution 
- Galaxies: clusters: general - Cosmology: observations - 
Cosmology: early Universe

Description:
   Observations of the radio galaxy MRC 0316-257 at z=3.13 and the 
   surrounding field resulted in the discovery of 77 candidate Ly-alpha 
   emitters with a rest-frame equivalent width of > 15 angstrom. 
   31 of 40 candidate emitters observed spectroscopically have redshifts 
   similar to that of the radio galaxy. 
 
   The properties of the Ly-alpha emission line of the 31 confirmed 
   emitters and the radio galaxy are presented in the file table2.dat 
   (Table 2 in the paper). The magnitudes and continuum slopes of these 
   z~3.1 galaxies are printed in the file table4.dat (Table 4 in the 
   paper). The Ly-alpha galaxies are faint, blue and small, consistent 
   with the emitters being young starforming galaxies which are still 
   nearly dust free. 

	
File Summary:
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 FileName    Lrecl    Records    Explanations
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ReadMe          80          .    This file
table2.dat     147         32    Ly-alpha line properties (table 2 of paper)
table4.dat      72         32    Magnitudes and slopes (table 4 of paper)
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Byte-by-byte Description of file: table2.dat
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   Bytes Format  Units        Label    Explanations
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  1-  4   A4     ---          ---      Object's number in SExtractor catalog
  6-  7   I2     h            RAh      Right Ascension J2000 (hours)
  9- 10   I2     min          RAm      Right Ascension J2000 (minutes)
 12- 16   F5.2   s            RAs      Right Ascension J2000 (seconds)
     18   A1     ---          DE-      Declination J2000 (sign)
 19- 20   I2     deg          DEd      Declination J2000 (degrees)
 22- 23   I2     arcmin       DEm      Declination J2000 (minutes)
 25- 28   F4.1   arcsec       DEs      Declination J2000 (seconds)
 30- 35   F6.4   ---          z        Redshift
 37- 42   F6.4   ---        e_z        Uncertainty in redshift
 44- 47   I4     zW/m2        flux     Ly-alpha line flux (in 10-18 erg/s/cm2)
 49- 50   I2     zW/m2      e_flux     Uncertainty in line flux
 52- 54   I3     0.1nm        ew       Rest-frame equivalent width of line
 56- 59   I4     0.1nm        ew+      [?] Upper sigma of equivalent width
 61- 63   I3     0.1nm        ew-      [?] Lower sigma of equivalent width
 65- 68   I4     km/s         fwhm     Line full width at half maximum (FWHM)
 70- 72   I3     km/s       e_fwhm     [?] Uncertainty in FWHM
 74- 77   F4.1   solMass/yr   sfr      [?] Star formation rate based on Ly-alpha
 79- 81   F3.1   solMass/yr e_sfr      [?] Uncertainty in SFR
 83-147   A65    ---          ---      Notes on individual objects
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Byte-by-byte Description of file: table4.dat
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   Bytes Format  Units        Label    Explanations
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  1- 4    A4     ---          ---      Object's number in SExtractor catalog
  6-10    F5.2   mag          NBmag    Narrowband magnitude 
 12-15    F4.2   mag        e_NBmab    Uncertainty in NBmag
 17-21    F5.2   mag          Vmag     V magnitude (1)
 23-26    F4.2   mag        e_Vmag     [?] Uncertainty in Vmag (1)
 28-32    F5.2   mag          Imag     [?] I magnitude (1)
 34-37    F4.2   mag        e_Imag     [?] Uncertainty in Imag (1) 
 39-43    F5.2   mag          I814mag  [?] ACS I_814 magnitude
 45-48    F4.2   mag        e_I814mag  [?] Uncertainty in I814mag
 50-54    F5.2   ---          beta     [?] UV continuum slope beta (2)
 56-59    F4.2   ---        e_beta     [?] Uncertainty in beta (2)
 61-65    F5.2   ---          betaACS  [?] UV continuum slope using ACS mag (2)
 67-70    F4.2   ---        e_betaACS  [?] Uncertainty in betaACS (2)
    72    A1     ---          ---      Notes on individual objects (3)
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Note (1): if no error is given for the V or I magnitude, then the object 
  was not detected in that band, and the magnitude given is a 2 sigma 
  lower limit. 
Note (2): if no error is given for the slope beta, then the value of the 
  slope is a 2 sigma limit.
Note (3): 
  A = Photometry unreliable due to nearby bright star.
  B = Undetected in ACS image, I814mag > 27.1 mag/arcsec2.
  C = Resolved by HST into several components.
  D = Photometry influenced by nearby object.
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(End)          Bram Venemans [Leiden Obs.]                          10-Nov-2004

