FERMILARGE AREA TELESCOPE DETECTION OF PULSED γ-RAYS FROM THE VELA-LIKE PULSARS PSR J1048–5832 AND PSR J2229+6114
- 11 November 2009
- journal article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 706 (2), 1331-1340
- https://doi.org/10.1088/0004-637x/706/2/1331
Abstract
We report the detection of γ-ray pulsations (≥0.1 GeV) from PSR J2229+6114 and PSR J1048–5832, the latter having been detected as a low-significance pulsar by EGRET. Data in the γ-ray band were acquired by the Large Area Telescope (LAT) aboard the Fermi Gamma-ray Space Telescope, while the radio rotational ephemerides used to fold the γ-ray light curves were obtained using the Green Bank Telescope, the Lovell telescope at Jodrell Bank, and the Parkes Telescope. The two young radio pulsars, located within the error circles of the previously unidentified EGRET sources 3EG J1048–5840 and 3EG J2227+6122, present spin-down characteristics similar to the Vela pulsar. PSR J1048–5832 shows two sharp peaks at phases 0.15 ± 0.01 and 0.57 ± 0.01 relative to the radio pulse confirming the EGRET light curve, while PSR J2229+6114 presents a very broad peak at phase 0.49 ± 0.01. The γ-ray spectra above 0.1 GeV of both pulsars are fit with power laws having exponential cutoffs near 3 GeV, leading to integral photon fluxes of (2.19 ± 0.22 ± 0.32) × 10–7 cm–2 s–1 for PSR J1048–5832 and (3.77 ± 0.22 ± 0.44) × 10–7 cm–2 s–1 for PSR J2229+6114. The first uncertainty is statistical and the second is systematic. PSR J1048–5832 is one of the two LAT sources which were entangled together as 3EG J1048–5840. These detections add to the growing number of young γ-ray pulsars that make up the dominant population of GeV γ-ray sources in the Galactic plane.Keywords
This publication has 50 references indexed in Scilit:
- The on-orbit calibration of the Fermi Large Area TelescopeAstroparticle Physics, 2009
- Detection of 16 Gamma-Ray Pulsars Through Blind Frequency Searches Using the Fermi LATScience, 2009
- MILAGRO OBSERVATIONS OF MULTI-TeV EMISSION FROM GALACTIC SOURCES IN THE FERMI BRIGHT SOURCE LISTThe Astrophysical Journal, 2009
- PULSED GAMMA-RAYS FROM PSR J2021+3651 WITH THEFERMILARGE AREA TELESCOPEThe Astrophysical Journal, 2009
- DISCOVERY OF PULSATIONS FROM THE PULSAR J0205+6449 IN SNR 3C 58 WITH THE FERMI GAMMA-RAY SPACE TELESCOPEThe Astrophysical Journal, 2009
- FERMI/LARGE AREA TELESCOPE BRIGHT GAMMA-RAY SOURCE LISTThe Astrophysical Journal Supplement Series, 2009
- THE LARGE AREA TELESCOPE ON THEFERMI GAMMA-RAY SPACE TELESCOPEMISSIONThe Astrophysical Journal, 2009
- FERMILARGE AREA TELESCOPE OBSERVATIONS OF THE VELA PULSARThe Astrophysical Journal, 2009
- DISCOVERY OF PULSED γ-RAYS FROM THE YOUNG RADIO PULSAR PSR J1028–5819 WITH THE FERMI LARGE AREA TELESCOPEThe Astrophysical Journal, 2009
- The Fermi Gamma-Ray Space Telescope Discovers the Pulsar in the Young Galactic Supernova Remnant CTA 1Science, 2008