Attaching image of SN 2017eaw in NGC 6946 (marked with red bars). Work with PRiSM v10 Advanced going on..
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Thank you Mr. Hamza.... ..I want to use LHIRES III spectroscope with PRiSM. want to fix slit guiding parameters and sky background subtraction from spectrum...I see there is a way in PRiSM, to subtract two FITS frames