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India's first robotic eye for time domain astrophysics: the GROWTH-India telescope

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arxiv 2206.13535 v1 pith:2OOQRFLG submitted 2022-06-27 astro-ph.IM astro-ph.HE

India's first robotic eye for time domain astrophysics: the GROWTH-India telescope

Harsh Kumar , Varun Bhalerao , G.C. Anupama , Sudhanshu Barway , Judhajeet Basu , Kunal Deshmukh , Kishalay De , Anirban Dutta
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Christoffer Fremling Hrishikesh Iyer Adeem Jassani Simran Joharle Viraj Karambelkar Maitreya Khandagale K Adithya Krishna Sumeet Kulkarni Sujay Mate Atharva Patil DVS Phanindra Subham Samantaray Kritti Sharma Yashvi Sharma Vedant Shenoy Avinash Singh Shubham Srivastava Vishwajeet Swain Gaurav Waratkar Dorje Angchuk Padma Dorjay Tsewang Dorjai Tsewang Gyalson Sonam Jorphail Tashi Thsering Mahay Rigzin Norbu Tarun Kumar Sharma Jigmet Stanzin Tsewang Stanzin Urgain Stanzin
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We present the design and performance of the GROWTH-India telescope, a 0.7 m robotic telescope dedicated to time-domain astronomy. The telescope is equipped with a 4k back-illuminated camera giving a 0.82-degree field of view and sensitivity of m_g ~20.5 in 5-min exposures. Custom software handles observatory operations: attaining high on-sky observing efficiencies (>~ 80%) and allowing rapid response to targets of opportunity. The data processing pipelines are capable of performing PSF photometry as well as image subtraction for transient searches. We also present an overview of the GROWTH-India telescope's contributions to the studies of Gamma-ray Bursts, the electromagnetic counterparts to gravitational wave sources, supernovae, novae and solar system objects.

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