Classification certificate for object 2011ek
TNS Classification Report No. 2094 [ 2018TNSCR.788....1B ]

Date Received (UTC): 2018-06-09 05:05:36
Sender: Mr. Dave Balam
Group: DAO_OTS

Dave Balam report/s a classification of object: SN 2011ek

Type: SN Ia
Redshift: 0.01

The following Classification spectrum was provided:

Obsdate: 2011-08-05 09:49:17
Instrument: Plaskett
Telescope: Dominion AStrophysical Observatory

Remarks: D. D. Balam, Dominion Astrophysical Observatory, National Research Council of Canada (NRCC); M. L. Graham, Las Cumbres Observatory Global Telescope, University of California at Santa Barbara; E. Y. Hsiao, Lawrence Berkeley Laboratory; and D. W. E. Green, Harvard University, report that a spectrogram (range 383-717 nm, resolution 0.3 nm) of PSN J02254889+1832000 = 2011ek, obtained on Aug. 7.41 UT with the 1.82-m Plaskett Telescope of the NRCC, shows it to be a type-Ia supernova before maximum light. Comparison with a library of supernova spectra using the "superfit" matching program of Howell et al. (2005, Ap.J. 634, 1190) indicates that 2011ek is a normal type-Ia supernova most similar to SN 2002bo at 11 days before maximum light.

Details of the object and its spectra can be viewed here: https://wis-tns.weizmann.ac.il/object/2011ek