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Swift UVOT observations of the SMC nova MASTER OT J010603.18-744715.8

ATel #9635; N. P. M. Kuin (UCL-MSSL), K. L. Page (U. Leicester), S. C. Williams (Lancaster), M. J. Darnley (LJMU), S. N. Shore (Universita` di Pisa), F. M. Walter (Stony Brook)
on 16 Oct 2016; 08:27 UT
Credential Certification: Paul Kuin (npkuin@gmail.com)

Subjects: Ultra-Violet, Nova

Referred to by ATel #: 9688

Since its discovery at magnitude 10.9 on 2016-10-14.19341 UT (Shumkov et al, ATEL #9621) and spectroscopic confirmation (Williams and Darnley, ATEL #9628) pre-discovery data from the OGLE team (Mroz and Udalski, ATEL #9622, and MASTER (Lipunov et al., ATEL #9631) revealed the progenitor magnitude and pushed back the appearance of the nova to magnitude 8.5 on 2016, Oct 9.808.

Swift observed the nova on 2016 Oct 15, 7:20 UT midtime for 500s. No X-rays were detected. The UVOT obtained a uv grism spectrum. Strong emission lines are observed of NIII] 1750Å, NII] 2143Å, Mg II 2800Å, and weaker lines of Si II 1810Å, Al III] 1863Å, CIII] 1909Å, CII 2325Å, OII] 2471Å. The line broadening at FWZI gives a velocity of 3770 km/s in the NII] 2143Å line. The line profiles of the strong lines show the peak on the blue side of the line profile. The line profiles of the weaker Si II 1810Å and CIII] 1909Å lines appear to be double peaked. There's unresolved absorption in the 2550-2650Å range consistent with the Fe-curtain still being weakly present.

We acknowledge the excellent support of the Swift team in planning this observation.