IOAA 2012, Наблюдения, първа нощ, английски — Задача 3

OBSERVATIONAL EXAM – 1ST NIGHT · 4 август 2012 г.

General instructions — Observational Exam
  • The duration of the exam is 20 min for each student.
  • There will be a copy of these instructions inside the envelope with the exam that will be given to you.
  • The exam is individual, and no conversation with anybody except with the guide who will be helping you with the telescope is allowed.
  • The necessary sky charts are included in the exam that will be handed to you.
  • In questions that involve pointing the telescope, the student can ask help of assistant at any time, at the cost of not getting the full marks for that question.
  • Material provided for each student: red flashlight, laser pointer, pencil, pen, eraser and clipboard.
  • WRITE YOUR ANSWERS IN INK. The organization will give you pens.

Условие

Use star chart-2 to estimate the magnitude of the missing star, shown as a cross, inside NGC 6231. Use magnitude of other stars as reference.

Note: To avoid confusion between decimal dot and real stars, dots are suppressed. So, magnitude 60 correspond to magnitude 6.0. Give your answer using one decimal scale and 0.1 precession. (Duration: 5 min)

Star chart of the open cluster NGC 6231 with a cross marking the missing star; several reference stars are labelled in red with magnitudes without decimal point: 55, 80, 89, 89, 88 and 65.
CHART 2 - NGC 6231 – Star magnitudes

Отговори

Решение

Оригинал в Архива: ObservationalNight1.docx · официални решения: ObsSOLUTION_Night1.docx · допълнителни данни: Instructions-obs.docx · допълнителни данни: ObservationalNight1text.doc