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J/ApJ/626/95        Gamma-ray blazar candidates          (Sowards-Emmerd+, 2005)
A northern survey of gamma-ray blazar candidates.
    Sowards-Emmerd D., Romani R.W., Michelson P.F., Healey S.E., Nolan P.L.
   <Astrophys. J., 626, 95-103 (2005)>
   =2005ApJ...626...95S
ADC_Keywords: BL Lac objects ; Radio sources ; Gamma rays

Keywords: BL Lacertae objects: general - gamma rays: observations


Abstract:
    In preparation for the Gamma-Ray Large Area Space Telescope (GLAST),
    we have compiled a sample of blazar candidates to increase the pool of
    well-studied active galactic nuclei from which GLAST counterparts will
    be drawn.

File Summary:

       FileName      Lrecl  Records   Explanations

ReadMe            80        .   This file
table1.dat        74      710   Figure-of-Merit-selected objects
table2.dat        28       74   X-Ray-selected targets


See also:
  VIII/40        : GB6 catalog of radio sources (Gregory+ 1996)
  VIII/65        : 1.4GHz NRAO VLA Sky Survey (NVSS) (Condon+ 1998)
  VIII/72        : CLASS survey of radio sources (Myers+, 2003)
  IX/10          : ROSAT All-Sky Bright Source Catalogue (1RXS) (Voges+ 1999)
  IX/29          : ROSAT All-Sky Survey Faint Source Catalog (Voges+ 2000)
  J/ApJS/123/79  : Third EGRET catalog (3EG) (Hartman+, 1999)
  J/ApJS/135/155 : Radio identification of 3EG EGRET sources (Mattox+, 2001)
  J/AJ/115/1253  : Deep X-Ray Radio Blazar Survey (DXRBS). I. (Perlman+ 1998)
  J/ApJ/590/109  : Gamma-ray blazar in northern sky (Sowards-Emmerd+, 2003)
  J/ApJ/609/564  : Blazar counterparts for 3EG sources (Sowards-Emmerd+, 2004)


Byte-by-byte Description of file: table1.dat

   Bytes Format Units   Label      Explanations

   1- 19  A19   ---     Name       Source name (JHHMMSS.ss+DDMMSS.s)
  21- 25  F5.3  ---     FoM        Figure of Merit (1)
  27- 31  F5.3  ---     P(Prod)    ? Product probability (2)
  33- 37  F5.3  ---     P(Peak)    ? Peak probability (2)
  39- 45  F7.1  mJy     S8.4GHz    The 8.4GHz flux density
  47- 51  F5.2  ---     SpIndex    Radio spectral index
  53- 57  F5.3  ct/s    Cts        ROSAT All-Sky Survey count rate
  59- 62  F4.1  mag     Rmag       ? The USNO B1.0 R2 magnitude
  64- 68  F5.3  ---     z          ? Redshift
      69  A1    ---     u_z        Uncertainty flag on z
      71  A1    ---     Type       Source classification (G1)
      73  I1    ---     Origin     Origin of Spectroscopy (4)

Note (1): The figure of merit is the combination of the fractional excesses for
          each of the counterpart candidate's properties with the estimate of
          the positional probability:
              FoM=n8.4GHz*nα*nX-ray*L(α,δ).
          Sources with FoM>1 are designated as "likely" counterparts, and
          0.25<FoM<1.0 as "plausible" counterparts.
Note (2): γ-ray probabilities are only listed for sources that survive
          our spatial cuts.
Note (4): Origin of spectroscopy, defined as follows:
    0 = No info;
    1 = Archival;
    2 = Our McDonald Observatory spectroscopy;
    3 = Our McDonald Observatory spectroscopy of a featureless BL Lac;
    4 = Our McDonald Observatory spectroscopy in addition to archival data;
    5 = Archival featureless BL Lac.


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

   Bytes Format Units   Label     Explanations

   1- 19  A19   ---     Name      Source name (JHHMMSS.ss+DDMMSS.s)
  21- 26  F6.4  ---     z         ? Redshift
      28  A1    ---     Type      Source classification (G1)


Global Notes:

Note (G1): Source classification, defined as follows:
    F = FSRQ (flat spectrum radio quasar)
    B = BL Lac object,
    N = NLRG (narrow-line radio galaxy)
    G = Galaxy
    S = Star
    E = passive elliptical
    ? = undecided


History:
    From electronic version of the journal
(End)                   Greg Schwarz [AAS], Marianne Brouty [CDS]    30-Nov-2005