SCAT Classifications of 9 Optical Transients
ATel #11948; Michael A. Tucker, Benjamin J. Shappee, Mark Huber (IfA, University of Hawai'i), J. L. Prieto (UDP/MAS)
on 13 Aug 2018; 22:33 UT
Credential Certification: Benjamin Shappee (shappee@hawaii.edu)
Subjects: Optical, Supernovae
The Spectral Classification of Astronomical Transients (SCAT) survey (ATel #11444) presents the classification of 9 optical transients. We report optical spectroscopy (330-970nm) taken with the University of Hawaii 88-inch (UH88) telescope using the SuperNova Integral Field Spectrograph (SNIFS). Transients were classified using the SuperNova IDentification code (SNID, Blondin & Tonry 2007, ApJ, 666, 1024).
Survey Name IAU Name Date Obs. Disc ATel. Type Phase Redshift Notes
ASASSN-18re SN2018eui 2018-08-11 ATel #11933 Ia-norm -0.6(4.7) 0.031 (host)
ATLAS18tbb SN2018epz 2018-08-11 ... Ia/b ... 0.101 (host) 1
ATLAS18tht SN2018etm 2018-08-11 ... Ia-norm -1(8) 0.026 (0.006) 2
ATLAS18tjp SN2018evb 2018-08-11 ... Ia-norm -5.9(4.8) 0.096 (0.008)
ATLAS18tco SN2018ero 2018-08-11 ... Ia-norm -4.2(3.9) 0.060 (0.007)
ATLAS18tjv SN2018evd 2018-08-11 ... Ia-norm -1.1(4.6) 0.055 (0.005)
ATLAS18tba SN2018epy 2018-08-11 ... Ia-91T -1.9(4.2) 0.010 (host) 3
Gaia18cae SN2018erb 2018-08-11 ... Ia 27(10) 0.041 (0.005)
Gaia18caf SN2018erc 2018-08-11 ... Ia-norm 22(19) 0.041 (0.005)
1) Only blue channel spectrum available.
2) Between 2 SDSS galaxies, the SNID redshift is consistent with photoZ of SDSSJ161420.50+031357.4 within 2.7 sigma. We note that ZTF_Bot1 has since posted a classification to TNS with a redshift of 0.55 (that of the other coincident galaxy). This, however, is inconsistent with SNID and would imply an absolute magnitude of approximately -24.
3) Possibly a Ia-norm, but more Ia-91T provide quality fits with SNID.
