Source

1
Source identification for the LAT catalogue I.
A. Grenier CEA Saclay S. W. Digel Stanford Linear
Accelerator Center
2
source properties

• Catalogue description for the sources detected
  with the automatic pipeline
• name
• positions (l, b, ?, ?, in decimal units)
• 67 and 99 error ellipses
• variability index (??) and error bars
• flux and source significance per month/week
  (regular/bright source) for some large energy
  band
• average flux in several energy bands
• single power-law spectral index (used for the
  instrument response) and 1? error
• identification if firm (based on variability or
  periodicity, or very small error box with
  unambiguous single counterpart)
• list of potential counterparts based on spatial
  coincidence and figure of merit

3
identification

• cross-correlation with other catalogues using A2
  tool
• A2 under control
• cross-identification of X-ray sources not
  available
• develop and implement normalized figures of merit
• not a prioritization figure
• for known source types blazars and pulsars
  (unpulsed, plerion), SNRs
• prepare for likely source types radiogalaxies,
  microquasars, galaxy clusters
• normalization problems
• all-sky surveys with known sensitivity available
  for radiosources, for a fraction of radio
  pulsars, from WMAP/Planck, 2Mass, SDSS sources,
  from ROSAT (but not sensitive enough for high-z
  blazars),
• many catalogues have no sensitivity information
• calibration of figure of merit against samples of
  identified sources

4
urgent need

• work out figures of merit!