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Up: The FUOR characteristics


3. Imaging

In the two-dimensional CCD spectrograms, of Htex2html_wrap_inline3942 taken in Jan'95, weak nebular emission-lines were detected along the spatial direction of the CCD image, which demonstrates that BN Ori is surrounded by a very faint emission (reflection) nebula. This is another property which BN Ori shares with the class of Herbig Ae/Be stars. Since these weak lines extended over the entire CCD frame, the diameter of this nebula must be larger than that covered by this frame (tex2html_wrap_inline394410tex2html_wrap3960). In order to get more insight in the morphology of this nebula, CCD images of BN Ori through tex2html_wrap_inline3948 and V, tex2html_wrap_inline3952, and a narrowband (FW = 13.5Å, centered at 6558.88Å) Htex2html_wrap_inline3954-filter (No. 674) were obtained in Feb'95 (de Winter 1995) with the Dutch 90cm telescope at ESO. However, we did not detect nebulosity around BN Ori on any of these images, which may be caused by the fact that the bandwidth of the Htex2html_wrap_inline3956-filter is still too large. In these cases the contribution from other surrounding wavelengths may be too high to permit imaging of the nebulosity in Htex2html_wrap_inline3958.

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