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| Issue Date | Title | Author(s) |
| 2019-08-10 | The 3.6 metre Devasthal optical telescope: from inception to realization | Sagar, R; Kumar, Brijesh; Omar, A |
| 2018-04 | 3.6-m Devasthal Optical Telescope Project: Completion and first results | Kumar, Brijesh; Omar, A; Maheswar, G; Pandey, A. K; Sagar, R; Uddin, W; Sanwal, B. B; Bangia, T; Kumar, T. S; Yadav, S; Sahu, S; Pant, J; Reddy, B. K; Gupta, A. C; Chand, H; Pandey, J. C; Joshi, M. K; Jaiswar, M; Nanjappa, N; Purushottam; Yadav, R. K. S; Sharma, S; Pandey, S. B; Joshi, S; Joshi, Y. C; Lata, S; Mehdi, B. J; Misra, K; Singh, M |
| 2018-04 | The 4-m International Liquid Mirror Telescope | Surdej, J; Hickson, P; Borra, E; Swings, J; Habraken, S; Akhunov, T; Bartczak, P; Chand, H; De Becker, M; Delchambre, L; Finet, F; Kumar, B; Pandey, A; Pospieszalska, A; Pradhan, B; Sagar, R; Wertz, O; De Cat, P; Denis, S; de Ville, J; Jaiswar, M. K; Lampens, P; Nanjappa, N; Tortolani, J |
| 1987-12 | An Analysis of Proper Motion and Membership Probability in Open Clusters | Sagar, R |
| 2015-08-25 | ARIES, Nainital: a strategically important location for climate change studies in the Central Gangetic Himalayan region | Sagar, R; Dumka, U. C; Naja, M; Singh, N; Phanikumar, D. V |
| 1999 | Atmospheric extinction at Devasthal, Naini Tal | Mohan, V; Uddin, W; Sagar, R; Gupta, S. K |
| 2000 | Binary star clusters in galaxies : Our galaxy | Subramaniam, A; Gorti, U; Sagar, R; Bhatt, H. C |
| 1999 | BVRI CCD photometric standards in the field of GRB 990123 | Nilakshi; Yadav, R. K. S; Mohan, V; Pandey, A. K; Sagar, R |
| 1998 | CCD imaging of gamma ray burster fields | Bhargavi, S. G; Cowsik, R; Pati, A. K; Sagar, R |
| 1990-06 | CCD photometry in VRI bands of the galactic cluster NGC 2818 | Surendiranath, R; Kameswara Rao, N; Sagar, R; Nathan, J. S; Ghosh, K. K |
| 1993 | CCD Photometry of NGC 2453 | Mallik, D. C. V; Sagar, R; Pati, A. K |
| 1990-03 | CCD photometry of the distant southern globular cluster NGC 5824 | Cannon, R. D; Sagar, R; Hawkins, M. R. S |
| 1991-06 | CCD photometry of the distant young open cluster NGC 7510 | Sagar, R; Griffiths, W. K |
| 1992 | CCD photometry of the galactic open star clusters. I - King 10 | Mohan, V; Pandey, A. K; Paliwal, D. C; Sagar, R; Mahra, H. S |
| 2004-12 | CCD photometry of the galactic star clusters Be 15, Be 71 and King 1 | Lata, S; Mohan, V; Sagar, R |
| 2004-03 | CCD photometry of the unstudied galactic star clusters Be 10, Be 67 and To 5 | Lata, S; Mohan, V; Pandey, A. K; Sagar, R |
| 2021-12 | Changing look AGN Mrk 590: broad-line region and black hole mass from photometric reverberation mapping | Amit Kumar Mandal; Schramm, Malte; Rakshit, Suvendu; Stalin, C. S; Vijarnwannaluk, Bovornpratch; Rujopakarn, Wiphu; Poshyachinda, Saran; Kouprianov, Vladimir V; Haislip, Joshua B; Reichar, Daniel E; Sagar, R; Mathew, Blesson |
| 2002-09 | A comparative study of the intra-night optical variability of powerful AGNs | Stalin, C. S; Gopal-Krishna; Sagar, R; Wiita, P. J |
| 2000-09 | A complete photometric study of the open cluster NGC 7790 containing Cepheid variables | Gupta, A. C; Subramaniam, A; Sagar, R; Griffiths, W. K |
| 2012-11 | Comprehensive multiwavelength modelling of the afterglow of GRB 050525A | Resmi, L; Misra, K; Johannesson, G; Castro-Tirado, A. J; Gorosabel, J; Jelınek, M; Bhattacharya, D; Kubanek, P; Anupama, G. C; Sota, A; Sahu, D. K; de Ugarte Postigo, A; Pandey, S. B; Sanchez-Ramırez, R; Bremer, M; Sagar, R |
