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Article overview
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Multicolor Photometry of the Vela Pulsar | R.P.Mignani
; P.A.Caraveo
; | Date: |
2 Jul 2001 | Journal: | Astron.Astrophys. 376 (2001) 213-216 | Subject: | astro-ph | Affiliation: | ESO, Garching, Germany) and P.A.Caraveo (I stituto di Fisica Cosmica del CNR, Milano, Italy | Abstract: | Multicolor photometry of the Vela pulsar (PSR B0833-45), updated by recent HST/WFPC2 observations obtained in the 555W, 675W and 814W filters, is presented. The available data provide the best characterization so far of the pulsar spectral shape, which is dominated by a flat power law continuum with spectral index alpha = -0.2 +/- 0.2, consistent with the extrapolation in the optical domain of the power law component of the X-ray spectrum detected by Chandra. In addition, a marginally significant dip (~ 3 sigma) seems to be present at about 6500 AA. Spectroscopic observations with the VLT, now in progress, will undoubtly provide a much better assessment of the reality and characteristics of this feature. | Source: | arXiv, astro-ph/0107027 | Services: | Forum | Review | PDF | Favorites |
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