J/MNRAS/424/L64 AGN/pulsar distinction for 2FGL sources (Mirabal+, 2012)
Fermi's SIBYL: mining the gamma-ray sky for dark matter subhaloes.
Mirabal N., Frias-martinez V., Hassan T., Frias-martinez E.
<Mon. Not. R. Astron. Soc., 424, L64-L68 (2012)>
=2012MNRAS.424L..64M 2012MNRAS.424L..64M
ADC_Keywords: Gamma rays ; Pulsars ; Active gal. nuclei
Keywords: pulsars: general - galaxies: active - dark matter
Abstract:
Dark matter annihilation signals coming from Galactic subhaloes may
account for a small fraction of unassociated point sources detected in
the second Fermi-LAT Catalogue (2FGL). To investigate this
possibility, we present SIBYL, a Random Forest classifier that offers
predictions on class memberships for unassociated Fermi-LAT sources at
high Galactic latitudes using gamma-ray features extracted from the
2FGL. SIBYL generates a large ensemble of classification trees that
are trained to vote on whether a particular object is an active
galactic nucleus (AGN) or a pulsar. After training on a list of 908
identified/associated 2FGL sources, SIBYL reaches individual accuracy
rates of up to 97.7 per cent for AGNs and 96.5 per cent for pulsars.
Predictions for the 269 unassociated 2FGL sources at |b|≥10°
suggest that 216 are potential AGNs and 16 are potential pulsars (with
majority votes greater than 70 per cent). The remaining 37 objects are
inconclusive, but none is an extreme outlier. These results could
guide future quests for dark matter Galactic subhaloes.
Description:
For our data set, we collected the complete Fermi-LAT 2FGL catalogue
that consists of 1873 sources (100MeV-100GeV), of which 1300 are
firmly identified/associated and 573 are unassociated sources
(Ackermann et al., 2011, Cat. J/ApJ/743/171; Abdo et al., 2012, Cat.
J/ApJS/199/31). In total, we consider a list that includes 800
labelled AGNs (BL Lacs and flat-spectrum radio quasars only) and 108
pulsars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 37 269 Predictions and voting percentages for unassociated
Fermi sources in the 2FGL, ordered by RA
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See also:
J/ApJ/743/171 : The 2LAC catalog (Ackermann+, 2011)
J/ApJS/199/31 : Fermi LAT second source catalog (2FGL) (Nolan+, 2012)
J/MNRAS/428/220 : Gamma-ray AGN type determination (Hassan+, 2013)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [2FGL]
6- 18 A13 --- 2FGL 2FGL name, JHHMM.m+DDMMa
20- 24 F5.3 --- P(AGN) [0/1] Probability for AGN type
26- 30 F5.3 --- P(Psr) [0/1] Probability for Pulsar type
32- 37 A6 --- Pred Prediction (AGN or Pulsar)
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History:
Copied at http://www.gae.ucm.es/~mirabal/sibyl.html
(End) Patricia Vannier [CDS] 06-Apr-2013