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We investigate the use of type Ic Super Luminous Supernovae as standardizablecandles and distance indicators. Their appeal as cosmological probes stems fromtheir remarkable peak luminosities, hot blackbody temperatures and brightrestframe ultraviolet emission. We present a sample of sixteen published SLSN,from redshifts 0.1 to 1.2 and calculate accurate K-corrections to determineuniform magnitudes in two synthetic rest-frame filters with central wavelengthsat 400nm and 520nm. At 400nm, we find a low scatter in their uncorrected, rawmean magnitudes with M(400)=-21.70 for the full sample of sixteen objects. Weinvestigate the correlation between their decline rates and peak magnitude andfind that the brighter events appear to decline more slowly. We define a$\Delta M(30)$ decay relation. This correlates peak magnitude and decline over30 days and can reduce the scatter to 0.25. We further show that M(400) appearsto have a strong colour dependence. Using this colour rate decay relation, alow scatter of between 0.19 and 0.26 can be found depending on sampleselection. However we caution that only eight to ten objects currently haveenough data to test this colour rate decline relation. We conclude that SLSN Icare promising distance indicators at high redshift in regimes beyond thosepossible with SNe Ia. Although the empirical relationships are encouraging, theunknown progenitor systems and how they may evolve with redshift are of someconcern. The two major measurement uncertainties are the limited numbers of lowredshift objects to test these relationships and internal dust extinction inthe host galaxies.

Super Luminous Supernovae as standardizable candles and high redshift distance probes