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Spectroscopy and Three‐Dimensional Imaging of the Crab Nebula

  • Authors: Andrej Čadež, Alberto Carramiñana, and Simon Vidrih

Čadež, CarramiÑana, & Vidrih 2004 The Astrophysical Journal 609 797.

  • Provider: AAS Journals

Caption: Fig. 1.

High‐resolution (upper panel) and low‐resolution (lower panel) images of the reduced spectrum for the slit angle 36°. Three 30 minute exposures for the high‐resolution spectrum were obtained on 2002 January 8, and five 20 minute exposures for the low‐resolution spectra were obtained on 2002 January 6. The high‐resolution spectrum covers the region between 6406 and 6842 Å (0.43 Å per pixel) and the low‐resolution spectrum covers wavelengths between 5387 and 7054 Å (1.6 Å per pixel). The vertical scale is ﹩560\ \mathrm{pixels}\,\times 0\farcs 46﹩ per pixel in both cases, but only pixels in the range ﹩10< m< 537﹩ are properly exposed in the high‐resolution spectrum, and in the range ﹩43< m< 545﹩ in the low‐resolution spectrum. Continuum is calibrated in the brightened vertical region centered at 6000 Å shown in the lower half of the lower panel.

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