FLOYDS Classification of ASASSN-17bo/AT 2017wb as a Young Type Ia Supernova
ATel #10026; G. Hosseinzadeh, I. Arcavi, D. A. Howell, C. McCully (Las Cumbres Obs./UCSB), S. Valenti (UC Davis)
on 30 Jan 2017; 19:31 UT
Credential Certification: Iair Arcavi (firstname.lastname@example.org)
Subjects: Optical, Supernovae
We obtained a spectrum of ASASSN-17bo/AT 2017wb (ATel #10022) on 2017 January 30.4 UT with the robotic FLOYDS instrument mounted on the Las Cumbres Observatory 2-meter telescope on Haleakala, Hawai'i. Using Superfit (Howell et al. 2005, ApJ, 634, 1190), we find good fits to several normal Type Ia supernovae about a week before maximum light at the redshift of the host galaxy (z=0.03, derived from the narrow H-alpha line in the spectrum), but with fits as early as -15 days and as late as -1 day. The 0.5 mag/day rise from ASAS-SN favors an earlier phase, while the current absolute magnitude (M_V ~ -19 mag) favors a phase closer to peak. The spectrum is available on the Transient Name Server.