Optical aspects of Near-Infrared Imager Spectrometer and Polarimeter instrument (NISP)
| Autor: | Sachindra Naik, Prachi Vinod Prajapati, Kiran S. Baliyan, Satya N. Mathur, Sukamal K. Paul, Deekshya Roy Sarkar, Alka Singh, Amish B. Shah, Shashikiran Ganesh, Pitambar S. Patwal, Prashanth Kumar Kasarla, Archita Rai, Hitesh Kumar L. Adalja |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Spectrometer business.industry Detector Near-infrared spectroscopy Polarimetry FOS: Physical sciences Polarimeter law.invention Telescope symbols.namesake Optics law symbols Stokes parameters Spectroscopy business Astrophysics - Instrumentation and Methods for Astrophysics Instrumentation and Methods for Astrophysics (astro-ph.IM) |
| Popis: | As a Near-IR instrument to PRL's upcoming 2.5 m telescope, NISP is designed indigeniously at PRL to serve as a multifaceted instrument. Optical, Mechanical and Electronics subsystems are being designed and developed in-house at PRL. It will consist of imaging, spectroscopy and imaging-polarimetry mode in the wavelength bands Y, J, H, Ks i.e. 0.8 - 2.5 micron. The detector is an 2K x 2K H2RG (MCT) array detector from Teledyne, which will give a large FOV of 10' x 10' in the imaging mode. Spectroscopic modes with resolving power of R ~ 3000, will be achieved using grisms. Spectroscopy will be available in single order and a cross-dispersed mode shall be planned for simultaneous spectra. The instrument enables multi-wavelength imaging-polarimetry using Wedged-Double Wollaston (WeDoWo) prisms to get single shot Stokes parameters (I, Q, U) for linear polarisation simultaneously, thus increasing the efficiency of polarisation measurements and reducing observation time. 8 pages, 10 figures, Submitted to SPIE Conference Astronomical Telescopes + Instrumentation 2020 |
| Databáze: | OpenAIRE |
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