S. Ellis, J. Bland-Hawthorn, S. Bauer, S. Case, R. Content, T. Fechner, D. Giannone, R. Haynes, E. Hernandez, A. Horton, U. Klauser, J. Lawrence, S. Leon-Saval, H. Löhmannsröben, S. Min, N. Pai, M. Roth, L. Waller, R. Zhelem
{"title":"PRAXIS: an OH suppression optimised near infrared spectrograph","authors":"S. Ellis, J. Bland-Hawthorn, S. Bauer, S. Case, R. Content, T. Fechner, D. Giannone, R. Haynes, E. Hernandez, A. Horton, U. Klauser, J. Lawrence, S. Leon-Saval, H. Löhmannsröben, S. Min, N. Pai, M. Roth, L. Waller, R. Zhelem","doi":"10.1117/12.2539883","DOIUrl":"https://doi.org/10.1117/12.2539883","url":null,"abstract":"The problem of atmospheric emission from OH molecules is a long standing problem for near-infrared astronomy. We are now close to solving this problem for the first time with the PRAXIS instrument. PRAXIS is a unique spectrograph which is fed by fibres that remove the OH background, and is optimised specifically to benefit from OH-Suppression. The OH suppression is achieved with fibre Bragg gratings, which were tested successfully on the GNOSIS instrument. The OH lines are suppressed by a factor of ~1000, leading to a reduction of the integrated background of a factor ≈9. A future upgrade to multicore fibre Bragg gratings will further increase this reduction. PRAXIS has had two commissioning runs, with a third commissioning run planned for July 2019, which will be presented at the conference. PRAXIS has a measured throughput of ≈20 %, demonstrating high efficiency in an OH suppression instrument for the first time. Science verification observations of Seyfert galaxies demonstrate the potential of OH suppression.","PeriodicalId":131350,"journal":{"name":"Micro + Nano Materials, Devices, and Applications","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116632704","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Horton, L. Spitler, Wilfred T. Gee, F. Longbottom, Jaime A Alvarado-Montes, A. Bazkiaei, Sarah E. Caddy, Steven Lee
{"title":"The Huntsman Telescope: lessons learned from building an autonomous telescope from COTS components","authors":"A. Horton, L. Spitler, Wilfred T. Gee, F. Longbottom, Jaime A Alvarado-Montes, A. Bazkiaei, Sarah E. Caddy, Steven Lee","doi":"10.1117/12.2539579","DOIUrl":"https://doi.org/10.1117/12.2539579","url":null,"abstract":"The Huntsman Telescope* is a wide field imager based on the successful Dragonfly Telescope concept.1 It consists of an array of co-aligned telephoto DSLR lenses with cooled CCD cameras. The ten 140 mm apertures have a combined collecting area equivalent to a 0.5 m class telescope but have lower stray light levels than a typical telescope of this size.1, 2 Its primary purpose is low surface brightness imaging of nearby galaxies, and it also observes exoplanet transits and other optical transients.","PeriodicalId":131350,"journal":{"name":"Micro + Nano Materials, Devices, and Applications","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124886513","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
B. Chandra, B. Nair, A. Suresh, C. S. Prabha, J. Mathew, Nirmal K., Mayuresh Sarpotdar, R. Mohan, M. Safonova, S. Sriram, Jayant Murthy
{"title":"Spectroscopic Investigation of Nebular Gas (SING): a dedicated NUV spectrograph to study extended objects","authors":"B. Chandra, B. Nair, A. Suresh, C. S. Prabha, J. Mathew, Nirmal K., Mayuresh Sarpotdar, R. Mohan, M. Safonova, S. Sriram, Jayant Murthy","doi":"10.1117/12.2539889","DOIUrl":"https://doi.org/10.1117/12.2539889","url":null,"abstract":"SING is a near ultraviolet (NUV) spectrograph with a size close to 6U CubeSat form-factor. The spectrograph operates in the wavelength range from 1800 Å to 3000 Å, with a spectral resolution of 2 Å at the central wavelength. The spectrograph is intended to operate in low Earth orbit (LEO), with the primary goal to generate spectral maps of the regions of the sky covered within the field of view (FOV) of the instrument, constrained by the orbital inclination of the spacecraft. The payload consists of the telescope in Cassegrain configuration focusing the light on the slit, the corrector lens, the concave grating, the detector, and other required electronics components. As the event rate in the UV is low, the spectrograph employs a photon-counting detector because of its low noise performance. The payload uses FPGA as the main system controller to handle the detector readout, data compression and storage, health monitoring, and telemetry. In this work, we present the optical design and its analysis, along with a brief description of the architecture of electronic subsystems of the payload.","PeriodicalId":131350,"journal":{"name":"Micro + Nano Materials, Devices, and Applications","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126735099","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. Rogozin, T. Feger, C. Schwab, Y. Gurevich, G. Raskin, D. Coutts, J. Stuermer, A. Seifahrt, T. Fuehrer, T. Legero, H. Van Winckel, S. Halverson, A. Quirrenbach
{"title":"Rubidium transitions as wavelength reference for astronomical Doppler spectrographs","authors":"D. Rogozin, T. Feger, C. Schwab, Y. Gurevich, G. Raskin, D. Coutts, J. Stuermer, A. Seifahrt, T. Fuehrer, T. Legero, H. Van Winckel, S. Halverson, A. Quirrenbach","doi":"10.1117/12.2541317","DOIUrl":"https://doi.org/10.1117/12.2541317","url":null,"abstract":"Precise wavelength calibration is a critical issue for high-resolution spectroscopic observations. The ideal calibration source should be able to provide a very stable and dense grid of evenly distributed spectral lines of constant intensity. A new method which satisfies all mentioned conditions has been developed by our group. The approach is to actively measure the exact position of a single spectral line of a Fabry-Perot etalon with very high precision with a wavelength-tuneable laser and compare it to an extremely stable wavelength standard. The ideal choice of standard is the D2 absorption line of Rubidium, which has been used as an optical frequency standard for decades. With this technique, the problem of stable wavelength calibration of spectrographs becomes a problem of how reliably we can measure and anchor one etalon line to the Rb transition. In this work we present our self-built module for Rb saturated absorption spectroscopy and discuss its stability.","PeriodicalId":131350,"journal":{"name":"Micro + Nano Materials, Devices, and Applications","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122217584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
James Webb, N. Bharmal, Craig Smith, Huizhe Yang, M. Blundell
{"title":"Application of the PPPP method for the determination of DLR pointing, tip/tilt, and wavefront errors","authors":"James Webb, N. Bharmal, Craig Smith, Huizhe Yang, M. Blundell","doi":"10.1117/12.2539977","DOIUrl":"https://doi.org/10.1117/12.2539977","url":null,"abstract":"Optimal transmission of pulsed laser energy to a target is essential for the maximization of reflected signal power in Debris Laser Ranging (DLR) systems. We describe the use of the PPPP measurement technique to allow compensation for both wavefront aberration, tip/tilt and errors arising from misalignment of the transmit and receive optical axes. This paper provides an update on the bistatic Wavefronts Obtained by Measuring Beam-profiles through Atmospheric Turbulence (WOMBAT) trial1 conducted with the EOS Space Systems 1.8m DLR system2 on Mt Stromlo, Australia, using an adjacent telescope to observe the 170 Hz PPPP intensity profiles.","PeriodicalId":131350,"journal":{"name":"Micro + Nano Materials, Devices, and Applications","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127963241","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
C. Pernechele, V. Da Deppo, G. Brydon, G. Jones, L. Lara, H. Michaelis
{"title":"Comet interceptor's EnVisS camera sky mapping function","authors":"C. Pernechele, V. Da Deppo, G. Brydon, G. Jones, L. Lara, H. Michaelis","doi":"10.1117/12.2539239","DOIUrl":"https://doi.org/10.1117/12.2539239","url":null,"abstract":"Entire Visible Sky (EnVisS) is one of the payload proposed for the ESA selected F-Class mission Comet Interceptor. The main aim of the mission is the study of a dynamically new comet, or an interstellar object, entering the inner solar system. The EnVisS camera is designed to capture the entire sky in some visible wavelength bands while the spacecraft passes through the comet's tail environment. EnVisS optical head is composed of a fisheye lens with a field of view of 180° x 40° coupled with an imaging detector equipped with both band-pass and polarimetric filters. Very wide angle lens, as a fisheye, must be necessarily anamorphic, i. e. its focal length must change along the field of view, in order to fit a finite-size imaging detector. This anamorphic distortion is introduced by the optical designer, depending on the desired applications. Each possible distortion bring along different field of view mapping and this must be taken into account by the scientific/metrological user, because the plate scale is variable along the focal plane. To obtain useful scientific information from fisheye images (astrometry, flux calibration and brightness measurements), a precise determination of the mapping function has to be accurately determined. In this paper we describe the expected distortion map of the EnVisS camera.","PeriodicalId":131350,"journal":{"name":"Micro + Nano Materials, Devices, and Applications","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133874910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Vaccarella, R. Sharp, M. Ellis, J. Gilbert, Shanae King, D. Adams
{"title":"Lucky imaging with the Leonardo SAPHIRA at Siding Spring Observatory","authors":"A. Vaccarella, R. Sharp, M. Ellis, J. Gilbert, Shanae King, D. Adams","doi":"10.1117/12.2539779","DOIUrl":"https://doi.org/10.1117/12.2539779","url":null,"abstract":"The Leonardo SAPHIRA is a HgCdTe linear avalanche photodiode array enabling high frame rate, high sensitivity, low noise, and low dark current imaging at near-infrared wavelengths. The ANU utilised the Leonardo SAPHIRA to develop a high cadence “Lucky Imager” which was successfully tested on sky at Siding Spring Observatory. The cryogenic electronics and cryostat were designed and built by the ANU. The cryostat was cooled with a compact Stirling cycle cryocooler with active vibration damping. Various detector control systems were tested, including an ESO 'NGC' system and also a 32 channel ARC SDSU Series III. Images were ultimately captured at a windowed frame rate of 2.2 kHz with the ESO NGC controller.","PeriodicalId":131350,"journal":{"name":"Micro + Nano Materials, Devices, and Applications","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133652146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Lingham, A. Bouchez, L. Gers, N. Herrald, J. Munro, T. Travouillon
{"title":"Design concept for Pocket-GMT","authors":"M. Lingham, A. Bouchez, L. Gers, N. Herrald, J. Munro, T. Travouillon","doi":"10.1117/12.2539922","DOIUrl":"https://doi.org/10.1117/12.2539922","url":null,"abstract":"One of the main challenges for the new generation of extremely large telescopes (ELT) such as the Giant Magellan Telescope (GMT) is apparent in their ability to phase the segments in their primary mirror. Due to the lack of viability of manufacturing enormous mirrors, these primary mirrors are composed of smaller segments, and therefore they must be phased. Prior to the full construction of GMT, there has been proposal to develop a small-scale laboratory testbed to reproduce elements of GMT’s design, major disturbances, and control systems. This would serve to reduce the risk in cost and time prior to commissioning. The team at the Australian National University’s (ANU) Research School of Astronomy and Astrophysics (RSAA) have developed a design concept for such a miniature version, coined Pocket-GMT. Pocket-GMT is designed to simulate GMT’s segmented primary mirror as well as introduce aberrations and distortions similar to what GMT will experience. This would present an opportunity to optimize the functionality of GMT’s control software and wavefront sensors, and to demonstrate phasing within the laboratory prior to full-scale telescope implementation. Pocket-GMT would also be compatible with later GMT instrument prototypes, thus ensuring its usefulness going into the future.","PeriodicalId":131350,"journal":{"name":"Micro + Nano Materials, Devices, and Applications","volume":"242 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114452873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. Sivo, D. Palmer, Julia Scahrwächter, M. Andersen, N. Provost, E. Marín, M. V. van Dam, B. Chinn, E. Chirre, C. Cavedoni, T. Schneider, Stacy Kang, P. Hirst, W. Rambold, A. Ebbers, P. Gigoux, L. Catala, T. Hayward, J. Blakeslee, H. Roe, J. Lotz, S. Kleinman, S. Sivanandam, A. Krause, M. Ammons, C. Trujillo, C. Packham, F. Marchis, J. Christou, J. Jee, J. Bally, M. Pierce, T. Puzia, P. Turri, Hwihyun Kim, M. Schwamb, T. Dupuy, R. Diaz, R. Carrasco, B. Neichel, C. Correia, E. Steinbring, F. Rigaut, J. Véran, M. Chun, M. Lamb, S. Chapman, S. Esposito, T. Fusco
{"title":"GNAO: an MCAO facility for Gemini North","authors":"G. Sivo, D. Palmer, Julia Scahrwächter, M. Andersen, N. Provost, E. Marín, M. V. van Dam, B. Chinn, E. Chirre, C. Cavedoni, T. Schneider, Stacy Kang, P. Hirst, W. Rambold, A. Ebbers, P. Gigoux, L. Catala, T. Hayward, J. Blakeslee, H. Roe, J. Lotz, S. Kleinman, S. Sivanandam, A. Krause, M. Ammons, C. Trujillo, C. Packham, F. Marchis, J. Christou, J. Jee, J. Bally, M. Pierce, T. Puzia, P. Turri, Hwihyun Kim, M. Schwamb, T. Dupuy, R. Diaz, R. Carrasco, B. Neichel, C. Correia, E. Steinbring, F. Rigaut, J. Véran, M. Chun, M. Lamb, S. Chapman, S. Esposito, T. Fusco","doi":"10.1117/12.2539706","DOIUrl":"https://doi.org/10.1117/12.2539706","url":null,"abstract":"Gemini Observatory has been awarded a major funding from the National Science Foundation to build a complete new state of the art multi-conjugate adaptive optics system for Gemini North. The system will be designed to provide an MCAO facility delivering close to diffraction limit correction in the near-infrared over a 2 arcminutes field of view and feed imaging and spectroscopic instruments. We present in this paper the results of the conceptual design phase with details on the new proposed laser guide star facilities and adaptive optics bench. We will present results on the performance simulation assessments as well as the developed selected science cases.","PeriodicalId":131350,"journal":{"name":"Micro + Nano Materials, Devices, and Applications","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127224202","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alexis Hill, N. Flagey, J. Marshall, A. Petric, K. Szeto
{"title":"Maunakea Spectroscopic Explorer: instrumentation for a massively multiplexed spectroscopic survey facility","authors":"Alexis Hill, N. Flagey, J. Marshall, A. Petric, K. Szeto","doi":"10.1117/12.2541195","DOIUrl":"https://doi.org/10.1117/12.2541195","url":null,"abstract":"Maunakea Spectroscopic Explorer (MSE) is a dedicated multi-object spectroscopic facility that is a major upgrade to the Canada-France-Hawaii-Telescope (CFHT) on Maunakea, Hawaii, with a larger aperture and an expanded international partnership. MSE has completed its Conceptual Design Phase (CoDP) and is preparing for the upcoming Preliminary Design Phase.","PeriodicalId":131350,"journal":{"name":"Micro + Nano Materials, Devices, and Applications","volume":"1997 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132491467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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