Abstract
Large ground and space-based surveys in optical and near-infrared (NIR) wavelengths will revolutionize astronomy in the coming decade. Unfortunately, no ultraviolet (UV) facilities are planned to complement these surveys, which is crucial for studying the most active phase of the Universe that includes star formation in galaxies, active galactic nuclei (AGN), galaxy clusters, etc. A dedicated UV mission, the Indian Spectroscopic and Imaging Space Telescope (INSIST), is proposed to observe the UV sky. The compelling science objectives defined a set of high-level mission requirements. According to which, the INSIST is to have a wide field-of-view (\(\textrm{FoV} \approx 0.25\) square degree) comparable to India’s Ultraviolet Imaging Telescope (UVIT) and about two orders of magnitude larger than that of the Hubble Space Telescope, simultaneous imaging of the FoV in UV (150–300 nm), u (300–400 nm) and g (400–550 nm) bands, a Multi-Object-Slit medium resolution spectroscopy in a narrow FoV in UV and a simultaneous slitless spectroscopic capability in UV and u bands. To achieve these requirements, several optical design configurations were explored. Here, we present an optical design trade study conducted on various optical design configurations to achieve a sensitivity limit of \(m_{\textrm{AB}}> 26\) mag, in the UV band and a spatial resolution better than 0.2\(^{\prime \prime }\), using a 1-m size telescope aperture. We also present results from our fabrication and alignment tolerance analysis of the selected optical designs, and the design performance that meets the design requirements. Critical parameters like the encircled energy concentration, point spread function (its stability over the field), effects of the spiders supporting the secondary, etc., are explored during the design phase. Based on the trade study conducted in reference to various performance matrices, we down-selected the most optimal optical design for the INSIST.
Similar content being viewed by others
References
Abell P. A., Allison J., Anderson S. F., et al. 2009, 0912.0201
Agrawal P. C. 2005, ICRC, 4, 171
Alsing J., Kirk D., Heavens A., Jaffe A. H. 2015, MNRAS, 452, 1202
Amara A., Refrégier A. 2007, MNRAS, 381, 1018
Amiaux J., Scaramella R., Mellier Y., et al. 2012, SPIE, 8442, 84420Z
Appenzeller I., Wolf B. 1979, A &A, 75, 164
Barstow M. A., WSO Team 2003, ASIB, 105, 407
Bertaux J.-L., Leblanc F., Witasse O., et al. 2005, Nature, 435, 790
Campbell M. A., Evans C. J., Mackey A. D., et al. 2010, MNRAS, 405, 421
Cook L. G. 1979, SPIE, 183, 207
Crowther P. A., Caballero-Nieves S. M., Bostroem K. A., et al. 2016, MNRAS, 458, 624
Cuzzi J., Clark R., Filacchione G., et al. 2009, Ring Particle Composition and Size Distribution, eds Dougherty M. K., Esposito L. W., Krimigis S. M., 459
Cuzzi J. N., French R. G., Hendrix A. R., et al. 2018, Icarus, 309, 363
Cuzzi J. N., Burns J. A., Charnoz S., et al. 2010, Science, 327, 1470
Cypriano E. S., Amara A., Voigt L. M., et al. 2010, MNRAS, 405, 494
de Vries W. H., Olivier S. S., Asztalos S. J., Rosenberg L. J., Baker K. L. 2007, ApJ, 662, 744
Dolphin A. E. 2016, ApJ, 825, 153
Ercolano B., Pascucci I. 2017, Royal Society Open Science, 4, 170114
Gardner J. P. 2006, in The Scientific Requirements for Extremely Large Telescopes, eds Whitelock P., Dennefeld M., Leibundgut B., Vol. 232, 87
Gentile M., Courbin F., Meylan G. 2013, A &A, 549, A1
George K., Poggianti B. M., Bellhouse C. 2019, MNRAS, 487, 3102
Ghosh S. K., Joseph P., Kumar A., et al. 2021, JoAA, 42, 20
Gillis B. R., Schrabback T., Marggraf O., et al. 2020, MNRAS, 496, 5017
Grodent D., Bonfond B., Yao Z., et al. 2018, Journal of Geophysical Research (Space Physics), 123, 3299
Guo R. L., Yao Z. H., Grodent D., et al. 2021, Geophys. Res. Lett., 48, e93964
Harvey J. E., Ftaclas C. 1995, ApOpt, 34, 6337
Heymans C., Van Waerbeke L., Bacon D., et al. 2006, MNRAS, 368, 1323
Hodge P. 1989, ARA &A, 27, 139
Hunter D. A., Vacca W. D., Massey P., Lynds R., O’Neil E. J. 1997, AJ, 113, 1691
Ivezic Z., Axelrod T., Brandt W. N., et al. 2008, SerAJ, 176, 1
Jadhav V. V., Sindhu N., Subramaniam A. 2019, ApJ, 886, 13
Jarvis M., Sheldon E., Zuntz J., et al. 2016, MNRAS, 460, 2245
Jarvis M., Bernstein G. M., Amon A., et al. 2021, MNRAS, 501, 1282
Jee M. J., Tyson J. A. 2011, PASP, 123, 596
Johns-Krull C. M. 2007, ApJ, 664, 975
Koenigl A. 1991, ApJ, 370, L39
Korsch D. 1980, ApOpt, 19, 3640
Kuhn J. R., Hawley S. L. 1999, PASP, 111, 601
Laureijs R., Amiaux J., Arduini S., et al. 2011, 1110.3193
Leahy D. A., Postma J., Chen Y., Buick M. 2020, ApJS, 247, 47
Leahy D. A., Postma J., Buick M., et al. 2021, JoAA, 42, 84
Lothringer Joshua D., Fu Guangwei, Sing David K., Barman Travis S., 2020, ApJ, 898, 14L
Mandelbaum R. 2006, PhD thesis, Princeton University
Mandelbaum R., Hirata C.-M., Ishak M., Seljak U., Brinkmann J. 2006, MNRAS, 367, 611
Mandelbaum R. 2018, ARA &A, 56, 393
Martin C., GALEX Science Team 2003, AAS, 203, 96.01
Mondal C., Subramaniam A., George K. 2018, AJ, 156, 109
Morrissey P., Conrow T., Barlow T. A., et al. 2007, ApJS, 173, 682
O’Connell J. S., Dodge W. R., Lightbody J. W., et al. 1987, PhRvC, 35, 1063
Portegies Zwart S. F., McMillan S. L. W., Gieles M. 2010, ARA &A, 48, 431
Rao N., Kameswara, De Marco O., et al. 2018, A &A, 620, 138
Roth L., Saur J., Retherford K. D., et al. 2014, Science, 343, 171
Rowe B. 2010, MNRAS, 404, 350
Sachkov M., Gómez de Castro A. I., Shustov B. 2020, SPIE, 11444E, 73
Saha K., Tandon S. N., Simmonds C., et al. 2020, Nature Astronomy, 4, 1185
Schneider P. 1996, MNRAS, 283, 837
Schroeder D. J. 1987, sdap.book
Shu F. H., Adams F. C., Lizano S. 1987, ARA &A, 25, 23
Sindhu N., Subramaniam A., Jadhav V. V., et al. 2019, ApJ, 882, 43
Sindhu N., Subramaniam A., Geller A. M., et al. 2020, IAUS, 351, 482
Sing D. K., Lecavelier des Etangs A., Fortney J. J., et al. 2013, MNRAS, 436, 2956
Sparks W. B., Hand K. P., McGrath M. A., et al. 2016, ApJ, 829, 121
Spergel D., Gehrels N., Baltay C., et al. 2015, arXiv: 1503.03757
Stewart A. I., Anderson D. E., Esposito L. W., Barth C. A. 1979, Science, 203, 777
Subramaniam A., Tandon S. N., Hutchings J., et al. 2016, SPIE, 9905, 99051F
Swithenbank-Harris B. G., Nichols J. D., Allegrini F., et al. 2021, Journal of Geophysical Research (Space Physics), 126, e28717
Tandon S. N., Subramaniam A., Girish V., et al. 2017, AJ, 154, 128
Tandon S. N., Postma J., Joseph P., et al. 2020, AJ, 159, 158
Terebizh V. Y. 2011, AN, 332, 714
Terebizh V. Y. 2016, AJ, 152, 121
Vidal-Madjar A., Lecavelier des Etangs A., Desert J. M., et al. 2003, Nature, 422, 143
Weisz D. R., Dolphin A. E., Skillman E. D. et al. 2014, ApJ 789, 147
Williams B. F., Lang D., Dalcanton J. J., et al. 2014, ApJS, 215, 9
Wilson R. N. 1996, rtob.book, 233
Wittman D. M., Tyson J. A., Kirkman D., Dell’Antonio I., Bernstein G. 2000, Nature, 405, 143
Acknowledgements
We thank the referee for providing constructive comments that have helped us in improving the work significantly. We gratefully acknowledge the support provided by the INSIST technical and science team. We also thank J. Pazder, Herzberg Astronomy and Astrophysics, for the useful discussions, suggestions and support given during this work. Also, we acknowledge ISRO for providing seed funding for the INSIST mission.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Sriram, S., Valsan, V., Subramaniam, A. et al. Indian spectroscopic and imaging space telescope (INSIST): An optics design trade-off study. J Astrophys Astron 44, 55 (2023). https://doi.org/10.1007/s12036-023-09934-y
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/s12036-023-09934-y