Follow-up spectroscopy and photometry of Dwarf Nova V392 Per

ATel #11617; M. Mugrauer, H. Gilbert, S. Hoffmann
on 7 May 2018; 19:56 UT
Credential Certification: Markus Mugrauer (markus@astro.uni-jena.de)

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On 2018 May 1th 20 UT (JD=2458240.333) we took spectroscopic data of the dwarf nova V392 Per (ATel #11588; ATel #11601; ATel #11605) with the echelle spectrograph FLECHAS (Mugrauer et al. 2014, AN 335, 417) at the 90cm telescope of the University Observatory Jena. The spectrum is the average of 3 spectra each with an integration time of 600s, covering the spectral range between 4200 and 8000Å at a resolving power of R~7400. The spectrum is wavelength calibrated (RMS of is 41.8mÅ) using spectra of a ThAr arc-lamp, which were taken directly before the spectroscopy of the dwarf nova. The spectrum of V392 Per is dominated by very broad emission features, exhibiting complex line profiles. Beside others the most prominent ones are those of Hydrogen (Hα, Hβ, and Hγ). The half-width of the Hα emission line is determined to be 4600±250km/s. In addition, also strong absorption features are identified in the spectrum of V392 Per as those of the interstellar NaI-doublet (5890Å & 5896Å) or of the diffuse interstellar bands at 5780Å, 5797Å, and 6614Å. Simultaneously with the spectroscopy, we also obtained photometric measurements of V392 Per with the CCD-imager CTK-II (Mugrauer 2016, AN 337, 226) in the B-, V- and R-band. We obtain B=8.61±0.05mag, V=7.83±0.05mag, and R=6.75±0.05mag, using the star BD+47 1026, as photometric reference.