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                                      Photometry


                                      Photometry: 

                                      Photometry is a technique in astronomy that measures the flux/intensity of an astronomical object's electromagnetic radiation. In this case, it is the measurement of the visible light spectrum of variable stars that is of interest to me.  The American Association of Variable Star Observers (AAVSO: http://www.aavso.org) is perhaps the world's greatest repository of variable star information.  I am a member of the AAVSO, and my observer initials are: JSHA.  

                                      My Observing Plan (work in progress): 

                                      1) BL CAM: I decided to make BL CAM one of the stars that would make it on my observing plan simply because it provides instant gratification.  It's location is ideal for observing from my site, and it has such a short period that it undergoes several cycles during an observing session.  It is a classified as an  SX Phoenicis (SXPHE) variable, which meant very little to me when I started photometry recently. These variables are pulsating subdwarfs, with spectral types in the range of A2-F5.  Their variability in amplitude light changes in usually in the range of 0.7 magnitudes in the visual (V), and their periods range from 0.04-0.08 days. (http://www.sai.msu.su/gcvs/gcvs/iii/vartype.txt),


                                      Simbad Database: http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=BL+CAM&submit=SIMBAD+search
                                      Picture
                                      Picture
                                      Example of my BL CAM Light Curves

                                      BL CAM Excel Data

                                      bl_cam_27_nov_2011_xls.xlsx
                                      File Size: 17 kb
                                      File Type: xlsx
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                                      bl_cam_xl.xlsx
                                      File Size: 17 kb
                                      File Type: xlsx
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                                      bl_cam_t7_vphot_jd2455977.497.xlsx
                                      File Size: 19 kb
                                      File Type: xlsx
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