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)
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.
