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FLOYDS Classification of PS17and/AT 2017acq as a Type Ia Supernova

ATel #10064; G. Hosseinzadeh, I. Arcavi, D. A. Howell, C. McCully (Las Cumbres Obs./UCSB), S. Valenti (UC Davis)
on 9 Feb 2017; 22:40 UT
Credential Certification: Iair Arcavi (iarcavi@lcogt.net)

Subjects: Optical, Supernovae

We obtained a spectrum of PS17and/AT 2017acq (ATel #10057) on 2017 February 9.3 UT with the robotic FLOYDS instrument mounted on the Las Cumbres Observatory 2-meter telescope on Haleakala, Hawai'i. Using SNID (Blondin & Tonry 2007, ApJ, 666, 1024), we find good fits to several normal Type Ia supernovae ranging from 11 days before maximum light at redshift z=0.065 to 8 days after maximum light at redshift z=0.050. Given these redshifts, the supernova may be associated with the galaxy 2MASX J05002994+7113379, whose redshift is not known, rather than the closer PGC 2741481. If this is the case, it has an unusually large galaxy offset of at least ~113 kpc. Alternatively it could be associated with an undetected dwarf galaxy, or with one of two GALEX UV sources, if they are galaxies, at separations of at least ~36 or ~88 kpc. The spectrum is available on the Transient Name Server.