Classification certificate for object 2011ff
TNS Classification Report No. 2095 [ 2018TNSCR.788....1B ]

Date Received (UTC): 2018-06-09 05:12:39
Sender: Mr. Dave Balam
Group: DAO_OTS

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

Type: SN Ia
Redshift: 0.023

The following Classification spectrum was provided:

Obsdate: 2011-08-25 06:59:24
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 J22450228+3400150 = SN 2011ff, obtained on Aug. 25.33 UT with the 1.82-m Plaskett Telescope of the NRCC, shows it to be a type-Ia supernova near maximum light. Cross-correlation with a library of supernova spectra using the "Supernova Identification" code (Blondin and Tonry 2007, Ap.J. 666, 1024) indicates that 2011ff is most similar to the type-Ia supernova 2004eo at 2 days past maximum light.

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