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KISS: Discovery and Spectroscopic Classification of a Type Ia Supernova KISS15q

ATel #7562; Tomoki Morokuma (U. of Tokyo), Nozomu Tominaga (Konan U./Kavli IPMU, U. Tokyo), Masaomi Tanaka (NAOJ), Ji-an, Jiang (U. of Tokyo), Takumi Shibata (Konan U.), Mitsuru Kokubo, Yasuhito Hashiba, Kazuma Mitsuda, Mamoru Doi, Shigeyuki Sako, Yuki Kikuchi, Hidenori Takahashi, Ken Tateuchi (U. of Tokyo), Hanindyo Kuncarayakti (Millennium Institute of Astrophysics, Chile), Makoto Watanabe, Hikaru Nakao (Hokkaido U.), Yoichi Itoh, Kumiko Morihana, Satoshi Honda, Yuhei Takagi, Jun Takahashi, (U. of Hyogo), and Masanori Takeishi (KISS collaboration)
on 26 May 2015; 01:17 UT
Credential Certification: Tomoki Morokuma (tmorokuma@ioa.s.u-tokyo.ac.jp)

Subjects: Optical, Supernovae

We report the discovery and spectroscopic identification of a Type Ia supernova, KISS15q. In Kiso Supernova Survey (KISS; Morokuma et al. 2014, PASJ, 66, 118), we found a transient object KISS15q of g=20.6 on May 19.60, 2015 UT in the g-band image. The transient object is located at (RA, Dec) = (13:12:53.70, +28:47:55.3) in J2000. We took optical low-resolution (R~100) spectra (10 min x 5) of KISS15q on May 22, 2015 UT with the Line Imager and Slit Spectrograph (LISS; Hashiba et al. 2014, SPIE, 9147, 2) on the 2.0-m Nayuta telescope at Nishi-Harima Observatory. Cross-correlation with a library of supernova spectra via the SNID code (Blondin and Tonry 2007, ApJ, 666, 1024) shows a best fit with Type Ia supernovae at z(SN) = 0.18 around maximum.