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Optical observations of nearby isolated pulsar PSR 0656+14 at the 6-meter telescope.



Abstract. The data of BVR observations of the middle-age radio pulsar PSR 0656+14 on January, 20/21 at the BTA (6-m) are presented. The brightness is determined in Cousins B filter B ≈ 25.1 with λeff = 4448˚A in adjacent for HST F130LP long-pass filter of a star-like object, coinciding with the position of VLA radio source. Relatively large observed V and R fluxes (< ∼3σ or> 10−30 ergs cm−2 s−2 Hz−1) can witness a non-thermal nature of optical radiation of this pulsar up to λ≈6600 ˚A. Most probably, in the UV-optical (BVR) spectral range a power-law spectrum is superimposed on the thermal-like radiation of the entire neutron star surface what can be related to a mechanism itself of the pulsar activity. Key words: pulsars, ground-based observations, CCD photometry 1

Year: 1997
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