| Issue |
A&A
Volume 376, Number 1, September II 2001
|
|
|---|---|---|
| Page(s) | 213 - 216 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361:20010951 | |
| Published online | 15 September 2001 | |
Multicolor photometry of the Vela pulsar *,**
1
ESO, Karl Schwarzchild Str. 2, 85740 Garching bei München, Germany
2
Istituto di Fisica Cosmica del CNR "G. Occhialini", Via Bassini 15, 20133 Milan, Italy
Corresponding author: R. P. Mignani, rmignani@eso.org
Received:
2
March
2001
Accepted:
29
June
2001
Multicolor photometry of the Vela pulsar (PSR
B0833-45), updated by recent HST/WFPC2 observations obtained in the
, 
and 
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
, 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 (≈3σ) seems to be present at about 6500 Å.
Spectroscopic observations with the VLT, now in progress, will
undoubtly provide a much better assessment of the reality and
characteristics of this feature.
Key words: pulsars: individual: PSR B0833-45
© ESO, 2001
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.