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• W2087788215 abstract "The Fermi Large Area Telescope discovered the time signature of a radio-silent pulsar coincident with RX J0007.0+7302, a plerion-like X-ray source at the centre of the CTA 1 supernova remnant. The inferred timing parameters of the γ-ray pulsar PSR J0007+7303 (P = 315.8 ms; |$dot{P} sim 3.6times 10^{-13}$| s s−1) point to a Vela-like neutron star, with an age comparable to that of CTA 1. The PSR J0007+7303 low distance (∼1.4 kpc), interstellar absorption (AV ∼ 1.6), and relatively high energy loss rate (⁠|$dot{E} sim 4.5times 10^{35}$| erg s−1), make it a suitable candidate for an optical follow-up. Here, we present deep optical observations of PSR J0007+7303. The pulsar is not detected in the Gran Telescopio Canarias images down to a limit of r′ ∼ 27.6 (3σ), the deepest ever obtained for this pulsar, while William Herschel Telescope images yield a limit of V ∼ 26.9. Our r′-band limit corresponds to an optical emission efficiency |$eta _{rm opt} equiv L_{rm opt}/dot{E} lesssim 9.4 times 10^{-8}$|⁠. This limit is more constraining than those derived for other Vela-like pulsars, but is still above the measured optical efficiency of the Vela pulsar. We compared the optical upper limits with the extrapolation of the XMM–Newton X-ray spectrum and found that the optical emission is compatible with the extrapolation of the X-ray power-law component, at variance with what is observed, e.g. in the Vela pulsar." @default.
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• W2087788215 date "2013-01-29" @default.
• W2087788215 modified "2023-10-17" @default.
• W2087788215 title "Deep optical observations of the γ-ray pulsar PSR J0007+7303 in the CTA 1 supernova remnant" @default.
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• W2087788215 doi "https://doi.org/10.1093/mnras/stt013" @default.
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