An optical search for supernova remnants in NGC 3184 and NGC 2903

6TH International Conference of the Balkan Physical Union --22 August 2006 through 26 August 2007 -- Istanbul --In this work, we present the results of an optical search for Supernova Remnants (SNRs) in the spiral galaxies NGC3184 and NGC2903. The SNR identification technique consisted of constructing continuum-subtracted H ? and [SII] ?? 6716,6731 images and then using [SII] / H? ratios obtained from the image. The SNR candidates are normally identified as nebulae that have [SII] / H? ratios >0.4 compared with HII regions <0.2. Our list of candidates contains 29 objects in NGC3184 and 10 objects in NGC2903. We compare our SNR candidate list against the existing X-ray and radio observations of the two galaxies. Knowing the positions of the SNRs, we can compare their distributions relative to HII regions and spiral arms. From these distributions, we can investigate such properties of possible SNR progenitors as their parent stellar populations and supernova types. These observations were performed with the 1.5m Russian-TurkishTelescope (RTT) Spectrograph TFOSCs (TUG Faint Object Spectrograph and Camera) CCD imaging system using narrowband interference filters at Turkish National Observatory (TUG) in March 2006. © 2007 American Institute of Physics