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Spectroscopic follow-up of WISE J181834.00-284919.6

ATel #4292; Y. Cao (Caltech), M. M. Kasliwal (Carnegie & Princeton), R. E. Williams (STScI), S. Ben-Ami and I. Arcavi (Weizmann)
on 31 Jul 2012; 21:55 UT
Credential Certification: Yi Cao (smartcaoyi@gmail.com)

Subjects: Optical, Nova

Referred to by ATel #: 4296

We report a spectroscopic follow-up of WISE J181834.00-284919.6 (ATel #4268) with the Double Spectrograph mounted on the 200-inch Hale telescope at Palomar Observatory on UT 2012/07/26. The spectrum of this transient resembles that of V443 Sct/89 on UT 1991/06/16 (Figure 3 in Williams, Phillips & Hamuy 1994). Without any continuum, the spectrum shows very rich line emission, including Balmer series and Paschen series, He I 5876, 6678 and 7065, He II 4686 and 5412, N II 5679, [N II] 5755, 6548 and 6583, N III 4640, [O I] 6300 and 6364, [O II] 7325, [O III] 4363, 4959 and 5007, [Ne III] 3869 and 3966, [S III] 9069 and 9532, [Ar III] 7751, [Ar IV] 7234, [Ar V] 7006, [Fe VII] 5721 and 6087. These spectrum features demonstrate that this transient is a FeII nova in its nebular phase in the Milky Way.