Optical Observations of the Nearby Isolated Pulsar PSR 0656+14 at the SAO 6-meter Telescope. |
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Authors: | VG Kurt BV Komberg VV Sokolov SV Zharykov |
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Institution: | (1) Astro Space Center of Russian Acad. of Sci., 117810 Moscow, Russia;(2) Special Astrophysical Observatory of Russian Acad. of Sci, Karachai Cherkessia, Nizhnij Arkhyz, 357147, Russia |
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Abstract: | BVR data for the middle-aged radio pulsar PSR 0656+14 obtained on January 20-21, 1996 at the 6-m telescope of the Special Astrophysical Observatory are presented. The brightness of a star-like object coincident with the position of the VLA radio source in the Cousins B filter is B 25.1, with eff = 4448Å, adjacent to the HST F130LP long-pass filter. The relatively large V and R fluxes ( 3 or > 10-30 ergs cm-2 s-2 Hz-1) provide evidence that the optical emission of this pulsar is non-thermal up to 6600 Å. Most probably, in the UV-optical (BVR) spectral range, a power-law spectrum is super-imposed on the thermal-like emission of the neutron star surface, which could be related to the mechanism of the pulsar activity itself. |
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Keywords: | pulsars ground-based observations CCD photometry |
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