IOAA 2019 — Задача 7. TASK 2/ALTERNATIVE: EPSILON LYRAE

OBSERVATIONAL ROUND – QUESTION SHEET · 15 т.

Условие

• In case of bad sky conditions at low altitudes, task 1 and 2 will be replaced by alternative tasks 1 and 2 (see page 3). In this situation, the telescope assistant will cross out Tasks 1 and 2.

• For these tasks, if you finish before the allotted time, you must keep tracking the object with the telescope till the end of allotted time. The telescope assistant will check the object only at the end of the allotted time.

available time: 10 minutes — Find ε Lyr, and make a drawing of the field of view (with the object and other stars) with 10mm eyepiece. Label the directions North and East by two arrows and mark them as 'N' and 'E'.

Estimate the angular distance between the wide pair (ε1-ε2), and estimate the position angle of the same pair.

Increase the magnification with 2x Barlow lens to be able to resolve and separate the two close pairs. Estimate the angle (in degrees to the nearest integer) subtended by the two close pairs relative to each other. (The enclosed angle of the two lines going through the two narrow pairs). Do not give any PA, only the relative angle of the two close pairs. No drawing is needed.

If you cannot find ε Lyr, the assistant can point to it for you, but only after 5 minutes. In this case you will lose the marks for pointing the telescope to the object. The telescope assistant will check the object at the end of the 10 min limit. If you are ready sooner, keep the star in the FOV, and wait for the check.

Решение

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Оригинал в Архива: NO-problem-final.pdf