Which Indian institute coordinated the decade-long optical study of the blazar OJ 287?
- A.Indian Institute of Astrophysics, Bengaluru
- B.Aryabhatta Research Institute of Observational Sciences, Nainital
- C.Inter-University Centre for Astronomy and Astrophysics, Pune
- D.Physical Research Laboratory, Ahmedabad
Show answer
Correct answer: B. Aryabhatta Research Institute of Observational Sciences, Nainital
Explanation
The correct answer is the Aryabhatta Research Institute of Observational Sciences, Nainital. The multi-institutional campaign on the blazar OJ 287 was coordinated by scientists of this institute, which is an autonomous body of the Department of Science and Technology, and the study was led by Dr Alok C. Gupta of the same institute. The team gathered 106 scientists from 18 countries and 48 institutions and universities, who observed the object with about two dozen telescopes between 2015 and 2025. Options A, C and D name well-known Indian centres for astronomy and space science, but none of them is credited with coordinating this particular study; they are offered because candidates often confuse the national astronomy institutes with one another. The safest way to remember the fact is to link the Nainital institute, its parent department and the name of the lead scientist together, since any of the three can be asked.