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    Question

    Consider the following statements about India’s

    AstroSat and its new discovery: 1. AstroSat observed an event around the black hole X-ray binary system “Swift J1727.8-1613”. 2. A unique finding was the detection of “aperiodic modulation” of high-energy X-rays. 3. The frequency of quasi-periodic oscillations in high-energy X-rays remained constant. Which of the above statements is/are correct?
    A 1 and 2 only Correct Answer Incorrect Answer
    B 2 and 3 only Correct Answer Incorrect Answer
    C 1 and 3 only Correct Answer Incorrect Answer
    D 1, 2, and 3 Correct Answer Incorrect Answer
    E None of the above Correct Answer Incorrect Answer

    Solution

    The frequency of quasi-periodic oscillations did not remain constant; it varied from 1.4Hz to 2.6Hz.

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