Details

Autor(en) / Beteiligte

• Abdo, A A
• Ackermann, M
• Ajello, M
• Allafort, A
• Bechtol, K
• Berenji, B
• Blandford, R D
• Bloom, E D
• Borgland, A W
• Bouvier, A
• Baldini, L
• Bellazzini, R
• Bregeon, J
• Brez, A
• Ballet, J
• Barbiellini, G
• Bastieri, D
• Bonamente, E
• Brigida, M
• Bruel, P

Titel

DISCOVERY OF PULSED gamma-RAYS FROM PSR J0034-0534 WITH THE FERMI LARGE AREA TELESCOPE: A CASE FOR CO-LOCATED RADIO AND gamma-RAY EMISSION REGIONS

Ist Teil von

• The Astrophysical journal, 2010-04, Vol.712 (2)

Ort / Verlag

United States

Erscheinungsjahr

2010

Link zum Volltext

Quelle

Free E-Journal (出版社公開部分のみ）

Beschreibungen/Notizen

• Millisecond pulsars (MSPs) have been firmly established as a class of gamma-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 gamma-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 gamma-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 gamma-ray peaks strongly suggests that the radio and gamma-ray emission regions are co-located and both are the result of caustic formation.