The Einstein@Home Gamma-ray Pulsar Survey. II. Source Selection, Spectral Analysis, and Multiwavelength Follow-up

We report on the analysis of 13 gamma-ray pulsars discovered in the Einstein@Home blind search survey using Fermi Large Area Telescope (LAT) Pass 8 data. The 13 new gamma-ray pulsars were discovered by searching 118 unassociated LAT sources from the third LAT source catalog (3FGL), selected using th...

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Bibliographic Details
Published in:The Astrophysical journal 2018-02, Vol.854 (2), p.99
Main Authors: Wu, J., Clark, C. J., Pletsch, H. J., Guillemot, L., Johnson, T. J., Torne, P., Champion, D. J., Deneva, J., Ray, P. S., Salvetti, D., Kramer, M., Aulbert, C., Beer, C., Bhattacharyya, B., Bock, O., Camilo, F., Cognard, I., Cuéllar, A., Eggenstein, H. B., Fehrmann, H., Ferrara, E. C., Kerr, M., Machenschalk, B., Ransom, S. M., Sanpa-Arsa, S., Wood, K.
Format: Article
Language:English
Subjects:
Algorithms
Astrophysics
Gamma emission
Gamma rays
gamma rays: stars
Machine learning
Magnetic properties
Physics
Polls & surveys
Probabilistic models
Pulsar magnetospheres
Pulsars
pulsars: individual (PSR J0002+6216, PSR J0631+0646, PSR J1624-4041, PSR J2017+3625)
Radio emission
Radio observation
Sciences of the Universe
Spectral analysis
Spectrum analysis
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Summary:We report on the analysis of 13 gamma-ray pulsars discovered in the Einstein@Home blind search survey using Fermi Large Area Telescope (LAT) Pass 8 data. The 13 new gamma-ray pulsars were discovered by searching 118 unassociated LAT sources from the third LAT source catalog (3FGL), selected using the Gaussian Mixture Model machine-learning algorithm on the basis of their gamma-ray emission properties being suggestive of pulsar magnetospheric emission. The new gamma-ray pulsars have pulse profiles and spectral properties similar to those of previously detected young gamma-ray pulsars. Follow-up radio observations have revealed faint radio pulsations from two of the newly discovered pulsars and enabled us to derive upper limits on the radio emission from the others, demonstrating that they are likely radio-quiet gamma-ray pulsars. We also present results from modeling the gamma-ray pulse profiles and radio profiles, if available, using different geometric emission models of pulsars. The high discovery rate of this survey, despite the increasing difficulty of blind pulsar searches in gamma rays, suggests that new systematic surveys such as presented in this article should be continued when new LAT source catalogs become available.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/aaa411