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[dwarf nova] SDSS J133941.11+484727.5 : spectroscopy on Feb. 9

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We performed spectroscopic observations of SDSS J133941.11+484727.5 on Feb. 9 (UT).

Our preliminary spectrum is shown in the figure.  The prominent H-alpha emission exists in its absorption component. Bload absorption lines are shown for H-beta, H-gamma, H-delta and He I (4471A).  These spectral features also indicate that the object is a dwarf nova as already reported in vsnet-alert 12807, 12816, 12817. The Bowen complex of NIII, CIII are possiblily detected, but He II (4686A) is not seen in our data. These lines are observed during outbursting phase of well observed WZ-Sge stars, WZ Sge, GW Lib and V455 And. Temperatures of excited region of SDSS J1339 might be lower than those in them.  We continue time-resolved observations of this dwarf nova.

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