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• W2037252145 abstract "We report on deep UBVRI-imaging of the field of the 17.3 Myr radiopulsar PSR B0950+08 obtained with the ESO/VLT/FORS1. Firm detection of the candidate pulsar optical counterpart in the BVRI bands with the magnitudes ± 0.35, ± 0.15, ± 0.10 and ± 0.17 enabled us to study, for the first time, the broadband spectrum of the object. The derived ~ offset of the object from the radiopulsar position is insignificant within the uncertainties of our astrometry and ~ seeing value during the observations. The positional coincidence and unusual colors of the candidate ensure us that we likely detect the optical emission from PSR B0950+08. The optical-near-UV spectrum of the pulsar has a negative slope and can be fitted by a power law with ± 0.40, suggesting nonthermal emission. Within errors the optical flux is consistent with the power law fit of the ROSAT spectrum from the X-ray counterpart. We analyze our results together with the available multiwavelength data on other isolated pulsars of different ages detected in the optical range and find a significant correlation between their optical and 2–10 keV X-ray luminosities. This implies an origin of the nonthermal emission in both spectral domains. These objects show a significantly non-monotonic evolution of the efficiency of the optical-X-ray photon production from the pulsar spindown power, with a pronounced minimum at the beginning of the middle-age epoch and comparably high efficiencies of younger and older pulsars. This suggests different sensitivities of the photon production processes to the Goldreich-Julian current in magnetospheres of different age pulsars." @default.
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• W2037252145 date "2004-03-26" @default.
• W2037252145 modified "2023-10-18" @default.
• W2037252145 title "Multiband optical observations of the old PSR B0950+08" @default.
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• W2037252145 doi "https://doi.org/10.1051/0004-6361:20034230" @default.
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