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Browsing by Author "Divakar, Devika"

Browsing by Author "Divakar, Devika"

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  • Atmospheric dispersion corrector for a multi-object spectroscopic mode of HROS-TMT 
    Manjunath, B; Hasan, Amirul; Divakar, Devika; Surya, Arun; Sriram, S; Sivarani, T; Prakash, A; Parvathy, M; Yadav, Sudharsan (SPIE-The International Society for Optical Engineering, 2023-10)
    Highly multiplexed spectroscopic surveys have changed the astronomy landscape in recent years. However, these surveys are limited to low and medium spectral resolution. High spectral resolution spectroscopy is often photon ...
  • Design and development of WFOS, the Wide-Field Optical Spectrograph for the Thirty Meter Telescope 
    Steidel, Charles; Peng, Eric; Fucik, Jason; Nash, Reston; Kaye, Stephen; Jacoby, George; Delabre, Bernard; Ramya, S; Divakar, Devika; Varshney, Hari Mohan; Sivarani, T; Uraguchi, Fumihiro; Ozaki, Shinobu; Ji, Hangxin; Tao, L V; Chiu, Kent; Zhu, Qinfeng; Andersen, David; Miles, John; Lasi, Davide (SPIE-The International Society for Optical Engineering, 2022-08)
    We present the current design of WFOS, a wide-field UV/optical (0.31-1.0 µm) imaging spectrograph planned for first-light on the TMT International Observatory 30 m telescope. WFOS is optimized for high sensitivity across ...
  • Design of SCALES: a 2-5 micron coronagraphic integral field spectrograph for Keck Observatory 
    Skemer, Andrew J; Stelter, R. Deno; Sallum, Stephanie; MacDonald, Nicholas; Kupke, Renate; Ratliff, Christopher; Banyal, R. K; Hasan, Amirul; Varshney, Hari Mohan; Surya, Arun; Prakaesh, Ajin; Sivarani, T; Ramya, S; Govinda, K. V; Fitzgerald, Michael P; Wang, Eric; Kassis, Marc; Absil, Olivier; Alvarez, Carlos; Batalha, Natasha; Boucher, Marc-Andre; Bourgenot, Cyril; Brandt, Timothy; Briesemeister, Zackery; Kleer, Katherine de; Pater, Imke de; Deich, William; Divakar, Devika; Filion, Guillaume; Gauvin, Etienne; Gonzales, Michael; Greene, Thomas; Hinz, Philip; Jensen-Clem, Rebecca; Johnson, Christopher; Kain, Isabel; Kruglikov, Gabriel; Lach, Mackenzie; Landry, Jean-Thomas; Li, Jialin; Liu, Michael C; Lyke, James; Magnon, Kenneth; Marin, Eduardo; Martin, Emily; Martinez, Raquel; Mawet, Dimitri; Miles, Brittany; Sandford, Dale; Sheehan, Patrick; Sohn, Ji Man; Stone, Jordan (SPIE-The International Society for Optical Engineering, 2022-08)
    We present the design of SCALES (Slicer Combined with Array of Lenslets for Exoplanet Spectroscopy) a new 2-5 micron coronagraphic integral field spectrograph under construction for Keck Observatory. SCALES enables ...
  • India-TMT project—science instrumentation program 
    Sivarani, T; Ramya, S; Sriram, S; Divakar, Devika; Surya, Arun; Varshney, Hari Mohan; Kambala, Sudarshan; Hasan, Amirul; Prakash, A; Govinda, K. V; Viswanatha; Anupama, G. C; Maheswar, G; Ojha, D; Pandey, S. B; Pandey, J; Puravankara, M; Ramaprakash, A. N; Reddy, B. E; Shah, Sarang; Srianand, R; Subramaniam, A; Subramanian, S (Indian Academy of Sciences, 2022-12)
    The future of astronomy in the coming decades will be shaped by the upcoming three extremely large optical telescopes, the Thirty Meter Telescope (TMT), the Giant Magellan Telescope (GMT) and the European Large Telescope ...
  • The Stability of Fiber Spectrographs in the Faint-source Regime 
    Bundy, Kevin; Law, David; MacDonald, Nick; Westfall, Kyle B.; Sivarani, T; Divakar, Devika; Bershady, Matthew; Gu, Meng; Yan, Renbin; Roy, Namrata; Poppett, Claire; Drory, Niv (American Astronomical Society, 2022-09-01)
    The use of optical fibers in astronomical instrumentation offers high-multiplex and light-gathering flexibility. However, with most previous fiber spectrographs optimized for large fields of view on modest-aperture telescopes, ...

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