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
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] 1750Ã
,
NII] 2143Ã
, Mg II 2800Ã
, and weaker lines of Si II 1810Ã
, Al III] 1863Ã
, CIII] 1909Ã
,
CII 2325Ã
, OII] 2471Ã
. The line broadening at FWZI gives a velocity of 3770 km/s in the
NII] 2143Ã
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 1810Ã
and CIII] 1909Ã
lines appear
to be double peaked. There's unresolved absorption in the 2550-2650Ã
range consistent
with the Fe-curtain still being weakly present.
We acknowledge the excellent support of the Swift team in planning this observation.
