The Spectrum of the Optical Transient in NGC 5775
Abstract
On 2012 April 25, we acquired spectra and images of NGC 5775 OT PSN J14535395+0334049, classified as a calcium transient similar to NGC 300 OT and SN 2008S in NGC 6496. The Russian 6-m telescope and the SCORPIO focal reducer were used. The spectral range was 4070 - 5830 A and the spectral resolution, 5.4 A.
The spectrum is noisy and shows a continuum with an H_{beta} emission line. The line has a two-component profile containing a narrow component, with FWHM 300 km/s, and a broad one, with FWHM 4000 km/s. The object is located at the front of the edge-on galaxy disk, it is weakly reddened. We estimate its M_V as -13.7m on the date of observation, typical of a calcium-type supernova impostor.- Publication:
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Peremennye Zvezdy
- Pub Date:
- June 2012
- Bibcode:
- 2012PZ.....32....2B