Khagol 118

Khagol (the Celestial Sphere) is the quarterly bulletin of We welcome your feedback at the following address: IUCAA, Post Bag 4, Ganeshkhind, Pune 411 007, India. Phone : (020) 2569 1414; 2560 4100 Fax : (020) 2560 4699 email : publ@iucaa.in Web page : http://www.iucaa.in/ matchstickds@gmail.com | KHAG L | No. 118 - APRIL 2019 | 20 Kavli Institute of Physics, Japan; P r a ya s S u t a r , T I S S , Mumb a i ; Subhashr ee Swa i n , Pondi che ry University; Shruti Tripathi, Saint Mary's University, Halifax, Canada; Santosh Vadawale, PRL, Ahmedabad; R. Vaisakh, IIT, Hyderabad; Bhargav Pradeep Vaidya, IIT, Indore; Manoj Varma, IIA, Bengaluru; Srinatha Venkatesha, Boyd Corporation, Bengaluru; Aditya Vidhate, BITS- Pilani, Hyderabad; Mukesh Kumar Vyas, ARIES, Nainital; and J. S. Yadav, TIFR, Mumbai. May 2019 Linn Abraham, St. Thomas College, Kozhencherri; G. K. Ankush, BITS- P i l a n i , H y d e r a b a d ; Ta n w i Bandyopadhyay, Adani Institute of I n f r a s t r u c t u r e E n g i n e e r i n g , Ahmedabad; Mukul Bhattacharya, University of Texas, Austin, USA; Kaustav Chatterjee, IISER, Mohali; Ta n u s h r e e C h o w d h u r y , S r i Venkateswara College, Delhi; Luca Cortese, The University of Western Australia; Subhadip De, NPL, New Delhi; PayaswineeDhoke, Dharampeth M. P. Deo Memorial Science College, Nagpur; Sarbari Guha, St. Xavier's College, Kolkata; Raja Guhathakurta, University of California, USA; Jyotishree Hota, NIT, Orissa; Josef Huber, ASTELCO, Germany; K. I n d u l e k h a , Ma h a t ma G a n d h i University, Kottayam; Joe Jacob, Newman College, Thodupuzha; Himani Jain, Maulana Azad NIT, Bhopal; Kanti Jotania, M.S. University of Baroda, Vadodara; Minu Joy, Alphonsa College, Pala; Shreejaya Karantha, Mahatma Gandhi Memorial College, Udupi; Sanika Khadkikar, BITS-Pilani, Hyderabad; Pransh Khubchandani, Maulana Azad NIT, Bhopal; Mamta, SGTB Khalsa College, Delhi; Soma Mandal, Government Girl's General Degree College, Kolkata; Norbert Muller, ASTELCO, Germany; Sanjay Kumar Pandey, LBSPG College, Gonda; Shravani Pandit, Fergusson College, Pune; Rutu Parekh, Dhirubhai Ambani Institute of Information and C o mmu n i c a t i o n Te c h n o l o g y, Gandhinagar. Devraj Pawar, RJ College, Mumbai; Annmaria J. Puthur, Vimala College, Trichur; B. S. Ratanpal, The M.S. University of Baroda, Vadodara; Saibal Ray, Government College of Engineering and Ceramic Technology, Kolkata; Sanjay Kumar Sahay, BITS- Pilani, Goa; Prasant Kumar Samantray, BITS-Pilani, Hyderabad; Sudipta Sarkar, IIT, Gandhinagar; Lydia Sertho, Vimala College, Trichur; Sparsh Singh, Maulana Azad NIT, Bhopal; H. Sree Kanth, University of Madras, Chennai; Praveer Tiwari, Washington State University, USA; S. K. Tripathy, Indira Gandhi Institute of Technology, Orissa; Deepak Vaid, NIT, Surathkal; Vijay Varma, Caltech, USA; and R. G. Vishwakarma, Universidad Autonoma de Zacatecas, Mexico. June 2019 G. Ambika, IISER, Tirupati; Dipanjali Behera, Indira Gandhi Institute of Techno l ogy, Or i s sa ; Suman t a Chakraborty, IACS, Kolkata; Suresh Chandra, Amity University, Noida; Sourav Roy Chowdhury, Vidya Sagar College, Kolkata; Debabrata Deb, Indian Institute of Engineering Science and Technology, Howrah; Shantanu Desai, IIT, Hyderabad; Jayanta Dutta, IISER, Mohali; Bhola Ishwar, BRABihar University, Muzaffarpur; Deepak Jain, Deen Dayal Upadhyaya College, New Delhi; Vinay Kashyap, Smithsonian Astrophysical Observatory, Harvard, USA; Nishikanta Khandai, NISER, Bhubaneswar; Ram Kishor, Central University of Rajasthan; Arun Kulkarni, BITS-Pilani, Goa; Rajesh Kumar, DDU Gorakhpur University; Kinjalk Lochan, IISER, Mohali; Bivudut t a Mi shra , BITS-Pi l ani , Hyderabad; Shrish Misra, NISER, Bhubaneswar; Nishant Mittal, Maharishi Dayanand College, Meerut; Arka Mondal, University of Calcutta, Ko l ka t a ; Ar ghya Mukhe r j e e , University of Calcutta, Kolkata; Udit Narain, Meerut College; Amit Pathak, Banaras Hindu University, Varanasi; B. C. Paul, North Bengal University, Darjeeling; Ananta Charan Pradhan, NIT, Orissa; Samrit Pramanik, University of Calcutta, Kolkata; M. X a v i e r J a m e s R a j , V S S C , T h i r u v a n a n t h a p u r a m ; T . R . Ra j a l akshmi , Maha tma Gandh i University, Kottayam; Shantanu Rastogi, DDU Gorakhapur University; Biplob Sarkar, The ICFAI University, Tripura; Somasri Sen, Jamia Millia Islamia, Delhi; T. R. Seshadri, University of Delhi; Joginder Sharma, BRC Budhana , Muza f f a rnaga r ; Manvinder Pal Singh, SGTB Khalsa College, Delhi; Parijat Thakur, Guru Ghasidas Vishwavidyalaya, Bilaspur; Lekshmi Thulasidharan, Central University of Tamil Nadu; and Paniveni Udayashankar, Bengaluru. LongTermVisitors Ajesh Gulati, TMT Project Office, USA; and David Hilditch, Adjunct Faculty, University of Lisbon, Portugal.