Fermi Gamma-ray Space Telescope

Detection of the high spin-down powered pulsars PSR J1837-0604 and PSR J1831-0952 with the Fermi-LAT

Helene Laffon
Lucas Guillemot, David Smith, Helene Laffon on behalf of the Fermi-LAT collaboration

Abstract:

More than 50$%$ of the known pulsars with spin-down power greater than $10^{36}$ erg/s show pulsations in gamma rays, as seen with the Fermi Large Area Telescope. Many non-detections are thought to be a consequence of a high background level reducing the signal to noise ratio or a large distance leading to a flux below the sensitivity limit of the instrument. Pass 8 is a new reconstruction and event selection strategy developed by the Fermi-LAT collaboration. Thanks to improved acceptance at low energy, the new Pass 8 data now allows the detection of gamma ray pulsations from two of these faint high spin-down pulsars, PSR J1837-0604 and PSR J1831-0952. We will report on their gamma-ray light curves as well as their spectral properties.