We present optical observations of a nearby Type Ia supernova (SN Ia) 2018kp on January 24 2018, +1.4 days after the estimated first light time. Its host galaxy, NGC 3367, has been under high-cadence monitoring (≲1 day) with the purpose of providing valuable early light curves of supernovae as a primary target of the Intensive Monitoring Survey of Nearby Galaxies (IMSNG; Im et al. 2019). SN 2018kp exhibits the characteristics of a normal SN Ia, with a peak luminosity of MB = −19.0 ± 0.4 mag and Δm15(B) = 1.19 ± 0.03 mag, derived from our long-term light curve analysis. We estimate the host extinction to be high [E(B − V )host = 0.697 ± 0.028 mag], contrasting with its sibling, SN 1986A. We estimate the mass of 56Ni synthesized in the explosion to beMNi = 0.55±0.14M⊙. A single power-law model (tα) describes the rising behavior of the early light curve well, with little evidence of the shock-heated cooling emission. We place upper limits on the radii of the progenitor (Rp ≤ 1.8 R⊙) and the companion star (Rc ≤ 1.9 R⊙ at the optimal or Rc ≤ 19.2 R⊙ at the common viewing angle, respectively) ruling out a large companion such as a red giant. Based on our data, we derive a distance to the host galaxy of 41.38 ± 2.20 Mpc assuming that SN 2018kp follows the Phillips relation.

Introduction
Observation, Data Reduction, and Photometry
Light Curve Analysis
    Long-Term Light and Color Curves
    Quasi-Bolometric Light Curve
Early Light Curve Analysis
SN Ia Siblings of SN 2018kp
Conclusion
Acknowledgments
References

• Gu Lim(Department of Earth Sciences, Pusan National University, Busan 46241, Republic of Korea, Institute for Future Earth (IFE), Pusan National University, Busan 46241, Republic of Korea) Corresponding author
• Dohyeong Kim(Department of Earth Sciences, Pusan National University, Busan 46241, Republic of Korea, Institute for Future Earth (IFE), Pusan National University, Busan 46241, Republic of Korea)
• Changsu Choi(SNU Astronomy Research Center (SNU ARC), Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea, Astronomy Program, Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea)
• Myungshin Im(SNU Astronomy Research Center (SNU ARC), Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea, Astronomy Program, Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea) Corresponding author
• Sung-Chul Yoon(SNU Astronomy Research Center (SNU ARC), Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea, Astronomy Program, Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea)
• Gregory S.H. Paek(SNU Astronomy Research Center (SNU ARC), Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea, Astronomy Program, Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea, Institute for Astronomy, University of Hawaii, Honolulu, HI 96822, USA)
• Sophia Kim(SNU Astronomy Research Center (SNU ARC), Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea, Astronomy Program, Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea)
• Mankeun Jeong(SNU Astronomy Research Center (SNU ARC), Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea, Astronomy Program, Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea)
• Bomi Park(SNU Astronomy Research Center (SNU ARC), Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea, Astronomy Program, Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea)
• Insu Paek(SNU Astronomy Research Center (SNU ARC), Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea, Astronomy Program, Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea)
• Seong-Kook Lee(SNU Astronomy Research Center (SNU ARC), Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea, Astronomy Program, Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea)
• Joonho Kim(SNU Astronomy Research Center (SNU ARC), Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea, Daegu National Science Museum, Daegu 43023, Republic of Korea)
• Hyun-Il Sung(Korea Astronomy and Space Science Institute, Daejeon 34055, Republic of Korea)
• Yongjung Kim(Korea Astronomy and Space Science Institute, Daejeon 34055, Republic of Korea)
• Yongmin Yoon(Korea Astronomy and Space Science Institute, Daejeon 34055, Republic of Korea, Department of Astronomy and Atmospheric Sciences, Kyungpook National University, Daegu, 41566, Republic of Korea)
• Yoon Chan Taak(SNU Astronomy Research Center (SNU ARC), Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea, Astronomy Program, Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea, Department of Physics and Astronomy, University of California, Los Angeles, CA 90095-1547, USA)
• Soojong Pak(School of Space Research, Kyung Hee University, Yongin 17104, Republic of Korea, Department of Astronomy and Space Science, Kyung Hee University, Yongin 17104, Republic of Korea)
• Tae-Geun Ji(School of Space Research, Kyung Hee University, Yongin 17104, Republic of Korea, Department of Astronomy and Space Science, Kyung Hee University, Yongin 17104, Republic of Korea)
• Hojae Ahn(School of Space Research, Kyung Hee University, Yongin 17104, Republic of Korea, Department of Astronomy and Space Science, Kyung Hee University, Yongin 17104, Republic of Korea)
• Wonseok Kang(Spacebeam Inc., Cheongju 28165, Republic of Korea)
• Taewoo Kim(Spacebeam Inc., Cheongju 28165, Republic of Korea, Department of Astronomy and Space Science, Chungbuk National University, Cheongju 28644, Republic of Korea)
• Shuhrat Ehgamberdiev(Ulugh Beg Astronomical Institute, Uzbek Academy of Sciences, Tashkent 700052, Uzbekistan, National University of Uzbekistan, Tashkent 100174, Uzbekistan)
• Otabek Burhonov(Ulugh Beg Astronomical Institute, Uzbek Academy of Sciences, Tashkent 700052, Uzbekistan)
• Davron Mirzaqulov(Ulugh Beg Astronomical Institute, Uzbek Academy of Sciences, Tashkent 700052, Uzbekistan)