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Chasing Dwarfs

Chasing Dwarfs. A Study in the Variability of the Central Star of M 57 By Paul Temple, Central Methodist University. Just a short talk on the Subject. Beginnings. 24” Lowell Refractor 6” Home Refractor (The Beast) Is the Central Star Variable? No one seemed to know!.

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Chasing Dwarfs

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  1. Chasing Dwarfs A Study in the Variability of the Central Star of M 57 By Paul Temple, Central Methodist University

  2. Just a short talk on the Subject

  3. Beginnings • 24” Lowell Refractor • 6” Home Refractor (The Beast) • Is the Central Star Variable? • No one seemed to know! M 57 with a 6” refractor The Beast and ST-7E Camera

  4. Amateur Considerations • Pro’s • It’s my party and I’ll view what I want to! • Area’s of study that are interesting but no longer in the limelight • Con’s • Huge learning curve • Studies are secondary to your day job • Professionals are not always very nice!

  5. Step in Al Grauer and Howard Bond! Telescopes using .6 to 1.2 meter Photometer Stromgren Yellow filter

  6. Kohoutek I-16Grauer and Bond 1984Note the sinusoidal light curve

  7. Why didn’t Grauer & Bond find variability?

  8. American Association of Variable Star Observers

  9. Wright 28 JC I filter

  10. Temple 28 11” SC SBIG ST cameras Johnson-Cousins and Sloan filters

  11. And Now a Word About Calibration… Maxim DL5 or AIP4Win

  12. Lots of Noise…but signs of a Sinusoidal Curve

  13. Gerald Handler told me in an email “I can’t get these things out of my mind…since I have no clue what causes the variability!”

  14. Take another sip… We are almost done!

  15. AAVSO added NSV 11500 for the Central Star of M 57 Limited differential photometry comparison stars Gerald Handler suggests ZZ Leporis classification for these stars.

  16. So what?

  17. What’s Next? Further observations Optical Shaping Diffusers for better accuracy Other CSPN’s Run the numbers and try and determine mechanism AAVSO Journal Article

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