Astronomy and Astrophysics – Astrophysics
Scientific paper
1997-01-22
Astrophys.Space Sci. 252 (1997) 451-460
Astronomy and Astrophysics
Astrophysics
10 pages, 3 figures, Latex (uses A&SS standard style file), submitted to A&SS
Scientific paper
The data of BVR observations of the middle-aged 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 lambda_eff=4448A in adjacent for HST F130LP long-pass filter of a star-like object, coinsiding with the position of VLA radio source. Relatively large observed V and R fluxes (<~3sigma or > 10E-30 ergs cm^-2 s^-2 Hz^-1) can witness a non-thermal nature of optical radiation of this pulsar up to lambda~~6600A. 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.
Komberg Boris V.
Kurt Victoria G.
Sokolov Valentin V.
Zharykov S. V.
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