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Title:
Optical observations of PSR J0205+6449
Authors:
Shearer, A.; Neustroev, V. V.
Affiliation:
AA(Centre for Astronomy, National University of Ireland, Galway, Newcastle Rd., Galway, Ireland; ), AB(Centre for Astronomy, National University of Ireland, Galway, Newcastle Rd., Galway, Ireland; )
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 390, Issue 1, pp. 235-238. (MNRAS Homepage)
Publication Date:
10/2008
Origin:
MNRAS
MNRAS Keywords:
pulsars: individual: PSR J0205+6449
DOI:
10.1111/j.1365-2966.2008.13693.x
Bibliographic Code:
2008MNRAS.390..235S

Abstract

PSR J0205+6449 is an X-ray and radio pulsar in supernova (SN) remnant 3C 58. We report on observations of the central region of 3C 58 using the 4.2-m William Herschel Telescope at the Isaac Newton Group of Telescopes, La Palma, with the intention of identifying the optical counterpart of PSR J0205+6449 and characterizing its pulsar wind nebula (PWN). Around the pulsar position, we identified extended emission with a magnitude of B = 23.97 +/-0.10mag, V = 22.95 +/-0.05mag and R = 22.15 +/-0.03mag consistent with a PWN. From the R-band image, we identified three knots with mR = 24.08 +/- 0.07mag (o1), 24.15 +/- 0.07mag (o2) and 24.24 +/- 0.08mag (o3). We confirm the presence of an optical PWN around PSR J0205+6449 and give an upper limit of mR ~ 24 for the optical magnitude of the pulsar. Furthermore, we make the tentative suggestion that our object o1, with an mR ~ 24.08, is the optical counterpart. If confirmed, the pulsar would have an LR/LX ~ 0.004 and an optical efficiency of about five per cent of the Crab pulsar. Such a low efficiency is more consistent with the characteristic age of the pulsar rather than that of SN 1181.
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