Comparing Type Ia Supernovae from Targeted and Wide Field Surveys

Details Comparing Type Ia Supernovae from Targeted and Wide Field Surveys Comparing Type Ia Supernovae from Targeted and Wide Field Surveys

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21924211q&link_type=abstract

American Astronomical Society, AAS Meeting #219, #242.11

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We compare the Type Ia Supernovae discovered by ROTSE-IIIb to other surveys including the targeted LOSS and wide field SDSS-II surveys. Although modest in size, the ROTSE-IIIb sample is both non-targeted and spectroscopically complete--and thus unique among supernova surveys. About half of the Type Ia supernovae found by ROTSE reside in dwarf galaxies, which is a much higher fraction than reported in other wide-field surveys that also use image subtraction techniques to remove the blinding glare of bright host galaxies. We calculate the volumetric SN Ia rate from the ROTSE-IIIb sample. The results, while of low significance, are supportive of a higher overall SN Ia rate than has previously been published, which combined with the surplus in dwarf hosts may indicate under counting of the contribution from low-luminosity hosts in prior works. We also compare the SN Ia luminosity function reported by LOSS to the volume limited SDSS-II sample and find the later lacking in low-luminosity events.

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