Identify the wavelengths of the Neon lines in Figure 3 as many as possible using the information in Figure 4 and 5. Some nearby lines may overlap. 2. Determine the centroids (i.e., pixel positions) of the lines. (There could be many different ways to do it.) 3. Obtain a linear least square fitting between the pixel positions of the Neon lines that you identified and their wavelengths. How good is the fitting? The linear fitting is the wavelength solution. 4. Apply the wavelength solution that you obtained in step 3 above to your blackbody spectrum. Now you know the wavelengths of the blackbody spectrum. What is the temperature of your blackbody?

1 400 1200 1000 Intensity 800 600 400 200 200 400 600 800 1000 Pixel Figure 3. Spectrum of a Neon lamp in "Ne_calib.dat."Relative Intensity 0.8 04 0.2 1.2 0.6 1 540.056 576.441 582.015 585.249 588.189 594.483 597.553 602.000 607.433 609.616 612.884 614.306 616.359 Figure 5. Relative intensities of the Neon lines above. This plot is from the same source as Figure 4. 621.728 626.649 630.479 Neon Wavelength [nm] 633.442 638.299 640.225 650.653 653.288 659.895 667.828 671.704 692.947 703.241 717.394 724.512 743.890 747.244 748.887 753.577 754.404