1. Indian Institute of Science Education and Research Bhopal , 462066 Madhya Pradesh , India
2. Space Telescope Science Institute Baltimore , MD 21218 , USA
3. Department of Physics, University of California Santa Barbara , CA 93106 , USA
4. Private Astronomer , Boulder, CO 80301 , USA
5. Kavli Institute for Particle Astrophysics & Cosmology (KIPAC), Stanford University , Stanford, CA 94305 , USA