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FLOYDS Classification of ATLAS17dkf/AT 2017csc as a Post-Peak Type Ib/c Supernova in a Very Faint Host

ATel #10362; G. Hosseinzadeh, D. A. Howell, I. Arcavi, C. McCully (Las Cumbres Obs./UCSB), S. Valenti (UC Davis)
on 9 May 2017; 20:15 UT
Credential Certification: Iair Arcavi (iarcavi@lcogt.net)

Subjects: Optical, Supernovae

We obtained a spectrum of ATLAS17dkf/AT 2017csc on 2017 May 4.5 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 Type Ib/c supernovae, including some Type Ic-BL supernovae, after maximum light at redshifts around z=0.03. This redshift implies that the potential host galaxy is very faint (M_g ~ -13 mag; SDSS DR13). Follow-up photometry from Las Cumbres Observatory's network of 1-meter telescopes shows that maximum light occurred around 2017 April 10. The spectrum is available on the Transient Name Server.