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J/ApJS/45/97 Extragal. Radio Sources Faraday Rotation (Simard-Normandin+ 1981)
The Faraday Rotation Measures of Extragalactic Radio Sources
    Simard-Normandin M., Kronberg P.P, Button S.
   <Astrophys. J. Suppl. 45, 97 (1981)>
   =1981ApJS...45...97S
ADC_Keywords: Radio sources ; Polarization

Keywords: galaxies: intergalactic medium - interstellar:
      matter - polarization; radio sources: general

Abstract:
    The rotation measures of 555 extragalactic radio sources are
    calculated as a result of a large number of new linear polarization
    measurements carried out by us at several wavelengths between 1.59 
    and 10.5GHz. A summary of references for previous polarization
    measurements is included, and the procedure for optimizing the number
    of unambiguous rotation measures is described.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table2.dat        60      555   Integrated Polarization of 555 Radio Sources


See also:
 J/MNRAS/190/205 : Magnetic fields in extragalactic radio sources (Clarke+ 1980)
 J/ApJS/145/213  : Rotation measures of compact sources in CGPS (Brown+, 2003)


Byte-by-byte Description of file: table2.dat

   Bytes Format Units   Label     Explanations

   1-  8  A8    ---     Name      IAUname (B1950)
  10- 19  A10   ---     Cname     Common name, P=PKS
  22- 26  F5.1  deg     GLON      Galactic longitude
  28- 32  F5.1  deg     GLAT      Galactic latitude
  34- 39  F6.4  ---     z         ? Redshift
  41- 42  A2    ---     optID    *Optical identification
  44- 47  I4    rad/m2  RM       *Integrated Faraday rotation measure
  49- 52  F4.1  rad/m2  e_RM      Error in integrated Faraday rotation measure
  55- 57  I3    deg     IPA       [0,180] intrinsic polarization position angle
  59- 60  I2    deg     e_IPA     [0,32] error in IPA

Note on optID: unexplained in the text, but most likely:
    G=galaxy, N=N-galaxy, D=D-galaxy, DB=dumb-bell galaxy,
    En=elliptical galaxy, Q=quasar, S0=S0 galaxy
    SO (=S0 ?), ED and ND are presumably intermediate types
Note on RM: The Faraday rotation measure RM relates the rotation to
    wavelength by φ=1/2.RM.λ2


History:
   Prepared via OCR by Heinz Andernach () as R440.
   The name 4C-021.9 was a typo in the original paper and corrected to 
   4C-02.19 (H.A. 22-Sep-97)
(End)                          Heinz Andernach [Guanajuato, Mexico]  04-Nov-1997