Discovery of Pulsed γ-Rays from PSR J0034-0534 with the Fermi Large Area Telescope: A Case for Co-Located Radio and γ-Ray Emission Regions

Details Discovery of Pulsed γ-Rays from PSR J0034-0534 with the Fermi Large Area Telescope: A Case for Co-Located Radio and γ-Ray Emission Regions Discovery of Pulsed γ-Rays from PSR J0034-0534 with the Fermi Large Area Telescope: A Case for Co-Located Radio and γ-Ray Emission Regions

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apj...712..957a&link_type=abstract

The Astrophysical Journal, Volume 712, Issue 2, pp. 957-963 (2010).

Astronomy and Astrophysics

Astronomy

25

Gamma Rays: General, Pulsars: General, Pulsars: Individual: Psr J0034–0534

Scientific paper

Millisecond pulsars (MSPs) have been firmly established as a class of γ-ray emitters via the detection of pulsations above 0.1 GeV from eight MSPs by the Fermi Large Area Telescope (LAT). Using 13 months of LAT data, significant γ-ray pulsations at the radio period have been detected from the MSP PSR J0034-0534, making it the ninth clear MSP detection by the LAT. The γ-ray light curve shows two peaks separated by 0.274 ± 0.015 in phase which are very nearly aligned with the radio peaks, a phenomenon seen only in the Crab pulsar until now. The >=0.1 GeV spectrum of this pulsar is well fit by an exponentially cutoff power law with a cutoff energy of 1.8 ± 0.6 ± 0.1 GeV and a photon index of 1.5 ± 0.2 ± 0.1, first errors are statistical and second are systematic. The near-alignment of the radio and γ-ray peaks strongly suggests that the radio and γ-ray emission regions are co-located and both are the result of caustic formation.

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