Slit Width and Resolution

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The spectrograph came with a slit with a spacing of 25 micrometers. We recently put in a new slit with a spacing of 35 micrometers. A wider slit means an increase in flux but a decrease in resolution. The following images are spectra of Gam Cas, the first one with the original slit and the second one with the wider slit. You can see the slight decrease in the resolution because the lines in the second image are wider. The average difference in the equivalent widths is 0.01 angstroms Gamcas old 6515.png Original Slit Gamcas new 6515.png Wider Slit