ATel #10400; Paul Luckas (International Centre for Radio Astronomy Research, University of Western Australia)
on 19 May 2017; 02:39 UT
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By a mistake of transcription the link for the discovery announcement, "Spectroscopic observations of ASASSN-17gk" (ATel #10399) should refer to ATel#10387 for the discovery. This is also a chance to note that the absence of some indicator lines of the Fe-curtain stage: Si II 4128/30,6347,6371; many of the [Fe II] lines were not yet in emission; and a thorough search for He I lines turned up nothing. The Balmer lines showed symmetric maximum velocities (absorption and emission) and weak asymmetries in the profile with a slight "fat tail" in the red wing. It is the strong D-line absorption alone that suggests this may be a possible dust former, but there was no strong emission component on the Na I resonance doublet.