arXiv - PHYS - Instrumentation and Methods for Astrophysics最新文献_第7页

An Instrument Error Budget for Space-Based Absolute Flux Measurements of the Sky Synchrotron Spectrum Below 20 MHz 基于空间的 20 兆赫以下天空同步加速器频谱绝对通量测量的仪器误差预算

arXiv - PHYS - Instrumentation and Methods for Astrophysics Pub Date : 2024-09-09 DOI: arxiv-2409.06510

Julie Rolla, Andrew Romero-Wolf, Joseph Lazio

引用次数: 0

CCAT: A status update on the EoR-Spec instrument module for Prime-Cam CCAT：Prime-Cam 的 EoR-Spec 仪器模块的最新情况

arXiv - PHYS - Instrumentation and Methods for Astrophysics Pub Date : 2024-09-09 DOI: arxiv-2409.05979

Rodrigo Freundt, Yaqiong Li, Doug Henke, Jason Austermann, James R. Burgoyne, Scott Chapman, Steve K. Choi, Cody J. Duell, Zach Huber, Michael Niemack, Thomas Nikola, Lawrence Lin, Dominik A. Riechers, Gordon Stacey, Anna K. Vaskuri, Eve M. Vavagiakis, Jordan Wheeler, Bugao Zou

{"title":"CCAT: A status update on the EoR-Spec instrument module for Prime-Cam","authors":"Rodrigo Freundt, Yaqiong Li, Doug Henke, Jason Austermann, James R. Burgoyne, Scott Chapman, Steve K. Choi, Cody J. Duell, Zach Huber, Michael Niemack, Thomas Nikola, Lawrence Lin, Dominik A. Riechers, Gordon Stacey, Anna K. Vaskuri, Eve M. Vavagiakis, Jordan Wheeler, Bugao Zou","doi":"arxiv-2409.05979","DOIUrl":"https://doi.org/arxiv-2409.05979","url":null,"abstract":"The Epoch of Reionization Spectrometer (EoR-Spec) is an upcoming Line\u0000Intensity Mapping (LIM) instrument designed to study the evolution of the early\u0000universe (z = 3.5 to 8) by probing the redshifted [CII] 158 $mu$m\u0000fine-structure line from aggregates of galaxies. The [CII] emission is an\u0000excellent tracer of star formation since it is the dominant cooling line from\u0000neutral gas heated by OB star light and thus can be used to probe the\u0000reionization of the early Universe due to star formation. EoR-Spec will be\u0000deployed on Prime-Cam, a modular direct-detection receiver for the 6-meter Fred\u0000Young Submillimeter Telescope (FYST), currently under construction by CPI\u0000Vertex Antennentechnik GmbH and to be installed near the summit of Cerro\u0000Chajnantor in the Atacama Desert. This instrument features an image plane\u0000populated with more than 6500 Microwave Kinetic Inductance Detectors (MKIDs)\u0000that are illuminated by a 4-lens optical design with a cryogenic, scanning\u0000Fabry-Perot Interferometer (FPI) at the pupil of the optical system. The FPI is\u0000designed to provide a spectral resolving power of $Rsim100$ over the full\u0000spectral range of 210--420 GHz. EoR-Spec will tomographically survey the\u0000E-COSMOS and E-CDFS fields with a depth of about 4000 hours over a 5 year\u0000period. Here we give an update on EoR-Spec's final mechanical/optical design\u0000and the current status of fabrication, characterization and testing towards\u0000first light in 2026.","PeriodicalId":501163,"journal":{"name":"arXiv - PHYS - Instrumentation and Methods for Astrophysics","volume":"59 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142217342","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}

引用次数: 0

Visual-band brightnesses of Near Earth Objects that will be discovered in the infrared by NEO Surveyor 近地天体巡天者将在红外线中发现的近地天体的视波段亮度

arXiv - PHYS - Instrumentation and Methods for Astrophysics Pub Date : 2024-09-09 DOI: arxiv-2409.05753

Joseph R. Masiero, Tyler Linder, Amy Mainzer, Dar W. Dahlen, Yuna G. Kwon

引用次数: 0

Application of Physics-Informed Neural Networks in Removing Telescope Beam Effects 物理信息神经网络在消除望远镜光束效应中的应用

arXiv - PHYS - Instrumentation and Methods for Astrophysics Pub Date : 2024-09-09 DOI: arxiv-2409.05718

Shulei Ni, Yisheng Qiu, Yunchuan Chen, Zihao Song, Hao Chen, Xuejian Jiang, Donghui Quan, Huaxi Chen

{"title":"Application of Physics-Informed Neural Networks in Removing Telescope Beam Effects","authors":"Shulei Ni, Yisheng Qiu, Yunchuan Chen, Zihao Song, Hao Chen, Xuejian Jiang, Donghui Quan, Huaxi Chen","doi":"arxiv-2409.05718","DOIUrl":"https://doi.org/arxiv-2409.05718","url":null,"abstract":"This study introduces PI-AstroDeconv, a physics-informed semi-supervised\u0000learning method specifically designed for removing beam effects in astronomical\u0000telescope observation systems. The method utilizes an encoder-decoder network\u0000architecture and combines the telescope's point spread function or beam as\u0000prior information, while integrating fast Fourier transform accelerated\u0000convolution techniques into the deep learning network. This enables effective\u0000removal of beam effects from astronomical observation images. PI-AstroDeconv\u0000can handle multiple PSFs or beams, tolerate imprecise measurements to some\u0000extent, and significantly improve the efficiency and accuracy of image\u0000deconvolution. Therefore, this algorithm is particularly suitable for\u0000astronomical data processing that does not rely on annotated data. To validate\u0000the reliability of the algorithm, we used the SKA Science Data Challenge 3a\u0000datasets and compared it with the CLEAN deconvolution method at the 2-D matter\u0000power spectrum level. The results demonstrate that our algorithm not only\u0000restores details and reduces blurriness in celestial images at the pixel level\u0000but also more accurately recovers the true neutral hydrogen power spectrum at\u0000the matter power spectrum level.","PeriodicalId":501163,"journal":{"name":"arXiv - PHYS - Instrumentation and Methods for Astrophysics","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142217392","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}

引用次数: 0

Roadmap of GHOST@Gemini's Precision Radial Velocity Mode GHOST@Gemini 精确径向速度模式路线图

arXiv - PHYS - Instrumentation and Methods for Astrophysics Pub Date : 2024-09-09 DOI: arxiv-2409.05656

Venu M. Kalari, Andreas Seifahrt, Ruben Diaz

引用次数: 0

Improving Early Detection of Gravitational Waves from Binary Neutron Stars Using CNNs and FPGAs 利用 CNN 和 FPGA 改进对双中子星引力波的早期探测

arXiv - PHYS - Instrumentation and Methods for Astrophysics Pub Date : 2024-09-08 DOI: arxiv-2409.05068

Ana Martins, Melissa Lopez, Quirijn Meijer, Gregory Baltus, Marc van der Sluys, Chris Van Den Broeck, Sarah Caudill

{"title":"Improving Early Detection of Gravitational Waves from Binary Neutron Stars Using CNNs and FPGAs","authors":"Ana Martins, Melissa Lopez, Quirijn Meijer, Gregory Baltus, Marc van der Sluys, Chris Van Den Broeck, Sarah Caudill","doi":"arxiv-2409.05068","DOIUrl":"https://doi.org/arxiv-2409.05068","url":null,"abstract":"The detection of gravitational waves (GWs) from binary neutron stars (BNSs)\u0000with possible telescope follow-ups opens a window to ground-breaking\u0000discoveries in the field of multi-messenger astronomy. With the improved\u0000sensitivity of current and future GW detectors, more BNS detections are\u0000expected in the future. Therefore, enhancing low-latency GW search algorithms\u0000to achieve rapid speed, high accuracy, and low computational cost is essential.\u0000One innovative solution to reduce latency is the use of machine learning (ML)\u0000methods embedded in field-programmable gate arrays (FPGAs). In this work, we\u0000present a novel texttt{WaveNet}-based method, leveraging the state-of-the-art\u0000ML model, to produce early-warning alerts for BNS systems. Using simulated GW\u0000signals embedded in Gaussian noise from the Advanced LIGO and Advanced Virgo\u0000detectors' third observing run (O3) as a proof-of-concept dataset, we\u0000demonstrate significant performance improvements. Compared to the current\u0000leading ML-based early-warning system, our approach enhances detection accuracy\u0000from 66.81% to 76.22% at a 1% false alarm probability. Furthermore, we\u0000evaluate the time, energy, and economical cost of our model across CPU, GPU,\u0000and FPGA platforms, showcasing its potential for deployment in real-time\u0000gravitational wave detection pipelines.","PeriodicalId":501163,"journal":{"name":"arXiv - PHYS - Instrumentation and Methods for Astrophysics","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142217396","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}

引用次数: 0

Spectral interferometric wavefront sensing: a solution for petalometry at Subaru/SCExAO 光谱干涉波前传感：Subaru/SCExAO 的花瓣测量解决方案

arXiv - PHYS - Instrumentation and Methods for Astrophysics Pub Date : 2024-09-08 DOI: arxiv-2409.05246

Vincent Deo, Sebastien Vievard, Manon Lallement, Miles Lucas, Elsa Huby, Kyohoon Ahn, Olivier Guyon, Julien Lozi, Harry-Dean Kenchington-Goldsmith, Sylvestre Lacour, Guillermo Martin, Barnaby Norris, Guy Perrin, Garima Singh, Peter Tuthill

{"title":"Spectral interferometric wavefront sensing: a solution for petalometry at Subaru/SCExAO","authors":"Vincent Deo, Sebastien Vievard, Manon Lallement, Miles Lucas, Elsa Huby, Kyohoon Ahn, Olivier Guyon, Julien Lozi, Harry-Dean Kenchington-Goldsmith, Sylvestre Lacour, Guillermo Martin, Barnaby Norris, Guy Perrin, Garima Singh, Peter Tuthill","doi":"arxiv-2409.05246","DOIUrl":"https://doi.org/arxiv-2409.05246","url":null,"abstract":"The petaling effect, induced by pupil fragmentation from the telescope\u0000spider, drastically affects the performance of high contrast instruments by\u0000inducing core splitting on the PSF. Differential piston/tip/tilt aberrations\u0000within each optically separated fragment of the pupil are poorly measured by\u0000commonly used Adaptive Optics (AO) systems. We here pursue a design of\u0000dedicated low-order wavefront sensor -- or petalometers -- to complement the\u0000main AO. Interferometric devices sense differential aberrations between\u0000fragments with optimal sensitivity; their weakness though is their limitation\u0000to wrapped phase measurements. We show that by combining multiple spectral\u0000channels, we increase the capture range for petaling aberrations beyond several\u0000microns, enough to disambiguate one-wave wrapping errors made by the main AO\u0000system. We propose here to implement a petalometer from the multi-wavelength\u0000imaging mode of the VAMPIRES visible-light instrument, deployed on SCExAO at\u0000the Subaru Telescope. The interferometric measurements obtained in four\u0000spectral channels through a 7 hole non-redundant mask allow us to effiiently\u0000reconstruct diffierential piston between pupil petals.","PeriodicalId":501163,"journal":{"name":"arXiv - PHYS - Instrumentation and Methods for Astrophysics","volume":"424 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142217498","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}

引用次数: 0

Reliable Detections of Atmospheres on Rocky Exoplanets with Photometric JWST Phase Curves 利用 JWST 的光度相位曲线可靠地探测岩石系外行星的大气层

arXiv - PHYS - Instrumentation and Methods for Astrophysics Pub Date : 2024-09-06 DOI: arxiv-2409.04386

Mark Hammond, Claire Marie Guimond, Tim Lichtenberg, Harrison Nicholls, Chloe Fisher, Rafael Luque, Tobias G. Meier, Jake Taylor, Quentin Changeat, Lisa Dang, Oliver Herbort, Johanna Teske

{"title":"Reliable Detections of Atmospheres on Rocky Exoplanets with Photometric JWST Phase Curves","authors":"Mark Hammond, Claire Marie Guimond, Tim Lichtenberg, Harrison Nicholls, Chloe Fisher, Rafael Luque, Tobias G. Meier, Jake Taylor, Quentin Changeat, Lisa Dang, Oliver Herbort, Johanna Teske","doi":"arxiv-2409.04386","DOIUrl":"https://doi.org/arxiv-2409.04386","url":null,"abstract":"The distribution of different types of atmospheres and surfaces on rocky\u0000planets is one of the major questions in exoplanet astronomy, but there are\u0000currently no published unambiguous detections of atmospheres on any rocky\u0000exoplanets. The MIRI instrument on JWST can measure thermal emission from\u0000tidally locked rocky exoplanets orbiting small, cool stars. This emission is a\u0000function of their surface and atmospheric properties, potentially allowing the\u0000detection of atmospheres. One technique is to measure day-side emission to\u0000search for lower thermal emission than expected for a black-body planet due to\u0000atmospheric absorption features. Another technique is to measure phase curves\u0000of thermal emission to search for night-side emission due to atmospheric heat\u0000redistribution. In this work we compare strategies for detecting atmospheres on\u0000rocky exoplanets using these techniques. We simulate secondary eclipse and\u0000phase curve observations in the MIRI F1500W and F1280W filters, for a range of\u0000surfaces and atmospheres on thirty exoplanets selected for their F1500W\u0000signal-to-noise ratio. Our results show that secondary eclipse observations are\u0000highly degenerate between surfaces and atmospheres, given the wide range of\u0000potential surface albedos. We also show that thick atmospheres can support\u0000emission consistent with a black-body planet in these filters. These two\u0000results make it difficult to unambiguously detect or rule out atmospheres using\u0000their photometric day-side emission, except in a subset of CO$_{2}$-dominated\u0000atmospheres. We suggest that an F1500W phase curve could instead be observed\u0000for a similar sample of planets, allowing the unambiguous detection of\u0000atmospheres by night-side emission.","PeriodicalId":501163,"journal":{"name":"arXiv - PHYS - Instrumentation and Methods for Astrophysics","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142217494","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}

引用次数: 0

RISTRETTO: a comparative performance analysis of the unmodulated Pyramid wavefront sensor and the Zernike wavefront sensor RISTRETTO：未调制金字塔波阵面传感器和泽尔奈克波阵面传感器的性能比较分析

arXiv - PHYS - Instrumentation and Methods for Astrophysics Pub Date : 2024-09-06 DOI: arxiv-2409.04255

Muskan Shinde, Nicolas Blind, Christophe Lovis

{"title":"RISTRETTO: a comparative performance analysis of the unmodulated Pyramid wavefront sensor and the Zernike wavefront sensor","authors":"Muskan Shinde, Nicolas Blind, Christophe Lovis","doi":"arxiv-2409.04255","DOIUrl":"https://doi.org/arxiv-2409.04255","url":null,"abstract":"The RISTRETTO instrument, a proposed visible high-contrast, high-resolution\u0000spectrograph for the VLT, has the primary science goal of detecting reflected\u0000light from nearby exoplanets and characterizing their atmospheres.\u0000Specifically, it aims to atmospherically characterize Proxima b, our closest\u0000temperate rocky exoplanet, located $37 mas$ from its host star, corresponding\u0000to $2lambda/D$ at $lambda=750 nm$. To achieve this goal, a raw contrast of\u0000less than $10^{-4}$ at $2lambda/D$ and a Strehl ratio greater than 70% are\u0000required, necessitating an extreme adaptive optics system (XAO) for the\u0000spectrograph. To meet the performance requirements for RISTRETTO, high\u0000sensitivity to low-order wavefront aberrations and petal modes is essential.\u0000Therefore, unmodulated Pyramid wavefront sensors (PWFS) and Zernike wavefront\u0000sensors (ZWFS) are under consideration. However, these sensors exhibit\u0000non-linearities and have a limited dynamic range, requiring different\u0000strategies to optimize their performance. The dynamic range of the sensors\u0000increases at longer wavelengths. Thus, in this study, we compare the\u0000performance of the 3-sided unmodulated PWFS, the 4-sided unmodulated PWFS, and\u0000the Zerniike WFS at different wavelengths in the visible and near-infrared\u0000regime.","PeriodicalId":501163,"journal":{"name":"arXiv - PHYS - Instrumentation and Methods for Astrophysics","volume":"81 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142217488","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}

引用次数: 0

Characterizing the performance of two C-RED ONE cameras for implementation in RISTRETTO and SAXO+ projects 鉴定两台 C-RED ONE 相机的性能，以便在 RISTRETTO 和 SAXO+ 项目中实施

arXiv - PHYS - Instrumentation and Methods for Astrophysics Pub Date : 2024-09-06 DOI: arxiv-2409.04247

Muskan Shinde, Jana Anouk Baron, Nicolas Blind, Janis Hagelberg, Christophe Lovis, François Wildi, Damien Ségransan

{"title":"Characterizing the performance of two C-RED ONE cameras for implementation in RISTRETTO and SAXO+ projects","authors":"Muskan Shinde, Jana Anouk Baron, Nicolas Blind, Janis Hagelberg, Christophe Lovis, François Wildi, Damien Ségransan","doi":"arxiv-2409.04247","DOIUrl":"https://doi.org/arxiv-2409.04247","url":null,"abstract":"In the near-infrared wavelength regime, atmospheric turbulence fluctuates at\u0000a scale of a few milliseconds, and its precise control requires the use of\u0000extreme adaptive optics (XAO) systems equipped with fast and sensitive\u0000detectors operating at kHz speeds. The C-RED One cameras developed by First\u0000Light Imaging (FLI), based on SAPHIRA detectors made of HgCdTe e-APD array\u0000sensitive to 0.8-2.5 $mu$m light, featuring a 320x256 pixels with 24 $mu$m\u0000pitch, offering sub-electron readout noise and the ability to read subarrays,\u0000at frame-rates of up to few 10-kHz, are state-of-the-art for XAO wavefront\u0000sensing. The Observatory of Geneva purchased two C-RED One cameras identified\u0000as necessary for RISTRETTO (a proposed high-contrast high-resolution\u0000spectrograph for the VLT) and SAXO+ (an upgrade of the VLT/SPHERE XAO system)\u0000projects. We present a comprehensive characterization and comparative analysis\u0000of both the cameras. We present test results examining key noise contributors,\u0000including readout noise, detector bias, etc. And we also study their temporal\u0000variability. Additionally, we assess the conversion gain and the avalanche gain\u0000calibration of the detector. We also study the evolution some of these\u0000parameters over time.","PeriodicalId":501163,"journal":{"name":"arXiv - PHYS - Instrumentation and Methods for Astrophysics","volume":"292 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142217490","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}

引用次数: 0