Testa, V; Mignani, RP; Rea, N; Marelli, M; Salvetti, D; Breeveld, AA; Cusano, F; Testa, V; Mignani, RP; Rea, N; Marelli, M; Salvetti, D; Breeveld, AA; Cusano, F; Carini, R; - view fewer (2018) Large Binocular Telescope observations of PSR J2043+2740. Monthly Notices of the Royal Astronomical Society , 473 (2) pp. 2000-2003. 10.1093/mnras/stx2512.

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Abstract

We present the results of deep optical imaging of the radio/γ-ray pulsar PSR J2043+2740, obtained with the Large Binocular Telescope (LBT). With a characteristic age of 1.2 Myr, PSR J2043+2740 is one of the oldest (non-recycled) pulsars detected in γ-rays, although with still a quite high rotational energy reservoir (Ė_rot=5.6×10³⁴ erg s⁻¹). The presumably close distance (a few hundred pc), suggested by the hydrogen column density (N_H ≲ 3.6 × 10²⁰ cm⁻²), would make it a viable target for deep optical observations, never attempted until now. We observed the pulsar with the Large Binocular Camera of the LBT. The only object (V = 25.44 ± 0.05) detected within ∼3 arcsec from the pulsar radio coordinates is unrelated to it. PSR J2043+2740 is, thus, undetected down to V  ∼ 26.6 (3σ), the deepest limit on its optical emission. We discuss the implications of this result on the pulsar emission properties.

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