Q. Consider the following statements regarding the “five-day annual International Pulsar Timing Array (IPTA) meet”:
1. It is hosted by Pune based National Centre for Radio Astrophysics (NCRA).
2. The IPTA is a collaboration of radio astronomers from a dozen countries across the globe.
3. It uses more than 12 radio telescopes all over the world with an aim to detect ultra-low frequency gravitational waves.
Which of the statements given above is/are correct?

[A] 1 only

[B] 1 and 2 only

[C] 2 and 3 only

[D] 1, 2 and 3

Answer: D
Notes:

The Pune-based National Centre for Radio Astrophysics (NCRA) is all set to host the five-day annual International Pulsar Timing Array (IPTA) meet from June 17 to 21.  

  • The IPTA is a collaboration of radio astronomers from a dozen countries across the globe.  
  • It uses more than 12 radio telescopes all over the world with an aim to detect ultra-low frequency gravitational waves.  
  • More than 40 expert international astronomers and 30 international students are expected to participate in the event, besides several Indian participants. 
  • “The upgrade of the Giant Metrewave Radio Telescope (GMRT) in Pune and the Ooty Radio Telescope (ORT) has helped us meet the parameters for being a full member of the IPTA. 
  • The current status of the quest for ultra-low frequency Gravitational Waves and the roadmap for future technical and scientific challenges is to be the main focus of the meeting. 
  • These waves are wrinkles in space-time produced by two massive black holes, each revolving around the other.  
  • Such black holes, which weigh billion times more than our Sun, are found in the centres of colliding galaxies.  
  • These waves affect radio pulses from 10km size stars called radio pulsars by changing ever so slightly the period of radio pulsation of these stars. 

Source: Indian Express