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FLOYDS Classification of ASASSN-16cr/AT 2016ase and AT 2016bam as Type II Supernovae

ATel #8807; G. Hosseinzadeh, I. Arcavi (LCOGT/UCSB), Y. Yang (Texas A&M/Mitchell Institute), D. A. Howell (LCOGT/UCSB), S. Valenti (UC Davis), C. McCully (LCOGT/UCSB)
on 13 Mar 2016; 00:33 UT
Credential Certification: Iair Arcavi (iarcavi@lcogt.net)

Subjects: Supernovae

We obtained two spectra of ASASSN-16cr/SN 2016ase (ATel #8784) on 2016 March 9.5 and 10.5 UT with the robotic FLOYDS instruments mounted on the LCOGT 2-meter telescopes in Siding Spring, Australia, and Haleakala, Hawai'i, respectively. The spectra show blue continua with weak broad features. By assuming a diffuse feature in the 2D spectral frames is H-alpha, we derive a redshift of approximately z=0.015. With this redshift, the broad features in the supernova spectra are consistent with the hydrogen Balmer series. We therefore classify the transient as a young Type II supernova. The spectra are available on the Transient Name Server.

We also obtained a spectrum of SN 2016bam, discovered by Masaki Tsuboi, on 2016 March 12.3 UT with FLOYDS on Haleakala, Hawai'i. Using Superfit (Howell et al. 2005, ApJ, 634, 119), we find a good fit to the Type II SN 1999em at maximum light at the redshift of the proposed host galaxy (z=0.014; SDSS DR1 via NED). The spectrum is available on the Transient Name Server.