SCAT classification of optical transients
ATel #12939; M A Tucker, A Do, A V Payne, M E Huber, B J Shappee
on 13 Jul 2019; 15:36 UT
Distributed as an Instant Email Notice Transients
Credential Certification: Michael Tucker (tuckerma95@gmail.com)
Subjects: Optical, Cataclysmic Variable, Nova, Supernovae, Transient
The Spectral Classification of Astronomical Transients (SCAT) survey (ATel #11444) presents the classification of 2 optical transients. We report optical spectroscopy (330-970nm, R~1200) 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). Redshifts given to 2 decimal places are derived supernova lines (via SNID), otherwise the redshifts are taken from NED or derived from narrow host galaxy emission lines.
Survey Name IAU Name Date Obs. Disc ATel. Type Phase Redshift Notes
ATLAS19ogl SN2019kai 2019-07-13 --- Ia-norm +8(3) 0.04 (1,2)
ATLAS19oyk AT2019kyt 2019-07-13 --- CV --- --- (1,3)
TCP J21+46 2019-07-13 --- CV --- --- (1,4,5)
1) Taken under poor weather conditions.
2) Possible narrow NaI D absorption at the redshift of the host which also matches the best-fit SNID redshift of z=0.038. However, there are no other obvious narrow features to corroborate this association so we regard it as tentative.
3) Nosiy, blue continuum with weak H and HeI in emission and absorption. Likely a CV, although other types of stellar variability are possible.
4) Full designation: TCP J21040470+4631129. Discovery posted to CBAT (see link), and a TNS identifier was not immediately available.
5) Spectrum exhibits a steep, blue continuum consistent with the results from ATel#12936 (F. Teyssier 2019), although our spectrum spans a slightly larger range at lower resolution (R~1200). We confirm strong emission from H, HeI, HeII and various ionized metals.
Discovery CBAT
