Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...115...79g&link_type=abstract
Astronomy and Astrophysics, vol. 115, no. 1, Nov. 1982, p. 79-83.
Astronomy and Astrophysics
Astrophysics
1
Astronomical Photometry, Astronomical Spectroscopy, Crab Nebula, Visual Photometry, Emission Spectra, Line Spectra, Supernova Remnants, Synchrotron Radiation
Scientific paper
The observations discussed were made on December 6 and 7, 1980, using the Walraven VBLUW simultaneous photometer with the Leiden 90-cm light collector (ESO, La Silla, Chile). For each observation, a 16-arcsec diaphragm was used, and the integration time was 192 s. The astrophysical quantities derived for M 1 from the broad passband VBLUW observations are found to agree with other observations. This agreement is believed to derive from a determination of the contribution of emission line radiation in the observations. It is pointed out that the photometric system may be used to observe, with smaller diaphragms (greater than about 5 arcsec), small-scale details of M 1, for example, the synchrotron emission of the wisps and the line emission at positions where spectral data are given by Woltjer (1958).
Greve Albert
van Genderen Arnout M.
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