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Where to begin the adventure with variable stars?

Mateusz Bielski. Where to begin the adventure with variable stars?. The variable stars that are particularly suitable for observations for beginners. Editors: A. Majczyna and M. Należyty Logo design: Armella Leung, www.armella.fr.to Translated to English by Magda Zarzycka.

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Where to begin the adventure with variable stars?

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  1. Mateusz Bielski Where to begin the adventure with variable stars? The variable stars that are particularly suitable for observations for beginners Editors: A. Majczyna and M. Należyty Logo design: Armella Leung, www.armella.fr.to Translated to English by Magda Zarzycka.

  2. The photometry of variable stars is ranked among the most difficult observations that can be done with the use of a webcam built on the basis of a CCD. Learning how to gather and process data requires patience and determination...

  3. In reward for this you will get results that have not only didactic, but also scientific value in the broadest sense of the word.Therefore, teachers can create with their students a true scientific laboratory at school!

  4. Which stars should we choose for a start? The process of developing your own technique is difficult and time-consuming. To be able to observe weaker stars or those whose amplitudes are smaller, it is a good idea to practise with those that are, so to say,‘created’ for photometric observations with a webcam. In the sky you will find precisely such stars, whose observations almost without exception return results that impress laymen or beginners equally.

  5. Below are three suggestions of stars whose amplitudes and magnitudes are so great that you can easily observe their minimum in the star light curve. The data come from observations conducted by the author. • RZ Cas • TX UMa • U Cep (an example of a flat-bottomed curve)

  6. RZ Cas • Type: eclipsing binary • Max magnitude: 6.4 mag • Min magnitude: 7.8 mag • Amplitude: 1.4 mag • Period: 1.19525780 JD

  7. RZ Cas – light curve Julian Days

  8. TX UMa • Type: eclipsing binary • Max magnitude: 7.06 mag • Min magnitude: 8.8 mag • Amplitude: 1.74 mag • Period: 3.06329200 JD

  9. TX UMa – light curve(incomplete, only one arm, but the variability is clearly visible) Julian Days

  10. U Cep • Type: eclipsing binary • Max magnitude: 6.74 mag • Min magnitude: 9.81 mag • Amplitude: 3.07 mag • Period: 2.49309770 JD

  11. U Cep – light curve

  12. How to find these stars in the sky?

  13. To be able to find the object of interest,it is necessary to know how to identify particular constellations and stars. This will require a few nights and some patience but what you will get in reward is a great satisfaction. A planisphere will be of great help while learning how to navigate around the sky. The easiest way to find it is on the internet (just search for ‘planisphere’ in any search engine) and buy it online (it costs around $8).

  14. This is what a planisphere looks like Very simple instructions how to use it can be found at the back of the planisphere.

  15. If you have a portable computer or have access to a stationary computer where you are, you can use electronic atlases of the sky. Most of them are commercial programs but you can also find freeware of this sort on the internet. Cartes Du Ciel is the most popular atlas It is available at: www.stargazing.net/astropc Electronic atlases are very helpful and allow users to print out accurate maps that help to identify variable stars and reference stars that are later used in the process of photometry.

  16. The navigation in the nightsky To navigate the sky quickly and effectively, it is necessary to learn first how to identify the main constellations. There are a few constellations in the sky whose main stars are very bright and whose shape is very characteristic and therefore easy to recognise.

  17. Ursa Major, also called Great Bear

  18. Ursa Major, also called Great Bear Mizar and Alcor

  19. Cassiopeia

  20. Cassiopeia

  21. Andromeda

  22. Andromeda M31

  23. Ursa Minor, also called Little Bear

  24. Ursa Minor, also called Little Bear Polaris

  25. Lyra

  26. Lyra Vega

  27. Cygnus, also called Northern Cross, Swan

  28. Cygnus, also called Northern Cross, Swan Deneb Vega Lyra

  29. Cepheus

  30. Cepheus Polaris Cassiopeia

  31. Perseus

  32. Perseus Algol

  33. HerculesDifficult to find

  34. HerculesDifficult to find

  35. Taurus, also called Bull

  36. Taurus, also called Bull Pleiades Aldebaran

  37. Orion

  38. Orion Aldebaran

  39. Gemini, also called Twins

  40. Gemini, also called Twins Castor Pollux

  41. Bootes

  42. Bootes Arcturus

  43. Aquila

  44. Aquila Altair

  45. Auriga, also called Charioteer

  46. Auriga, also called Charioteer Capella

  47. Leo, also called Lion

  48. Leo, also called Lion Regulus

  49. Pegasus

  50. Pegasus

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