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Progress towards an array-wide diffuse UHE neutrino search with the Askaryan Radio Array 利用阿斯卡良射电阵列进行全阵列弥散超高频中微子搜索的进展情况
arXiv - PHYS - Instrumentation and Methods for Astrophysics Pub Date : 2024-09-05 DOI: arxiv-2409.03854
Marco Stein Muziofor the ARA Collaboration
{"title":"Progress towards an array-wide diffuse UHE neutrino search with the Askaryan Radio Array","authors":"Marco Stein Muziofor the ARA Collaboration","doi":"arxiv-2409.03854","DOIUrl":"https://doi.org/arxiv-2409.03854","url":null,"abstract":"The Askaryan Radio Array (ARA) is an in-ice ultrahigh energy (UHE) neutrino\u0000experiment at the South Pole. ARA aims to detect the radio emissions from\u0000neutrino-induced particle showers using in-ice clusters of antennas buried\u0000${sim}200$ m deep on a roughly cubical lattice with side length of ${sim}10$\u0000m. ARA has five such independent stations which have collectively accumulated\u0000${sim}30$ station-years of livetime through 2023. The fifth station of ARA has\u0000an additional sub-detector, known as the phased array, which pioneered an\u0000interferometric trigger constructed by beamforming the signals of $7$ tightly\u0000packed, vertically-polarized antennas. This scheme has been demonstrated to\u0000significantly improve the trigger efficiency for low SNR signals. In this talk,\u0000we will present the current state of the first array-wide diffuse neutrino\u0000search using $24$ station-years of data (through 2021). We anticipate that this\u0000analysis will result in the first UHE neutrino observation or world-leading\u0000limits from a radio neutrino detector below $100$ EeV. Additionally, this\u0000analysis will demonstrate the feasibility for multi-station in-ice radio arrays\u0000to successfully conduct an array-wide neutrino search -- paving the way for\u0000future, large detector arrays such as RNO-G and IceCube-Gen2 Radio.","PeriodicalId":501163,"journal":{"name":"arXiv - PHYS - Instrumentation and Methods for Astrophysics","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142217491","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
Photonic chip for visible interferometry: laboratory characterization and comparison with the theoretical model 用于可见光干涉测量的光子芯片:实验室鉴定及与理论模型的比较
arXiv - PHYS - Instrumentation and Methods for Astrophysics Pub Date : 2024-09-05 DOI: arxiv-2409.03808
Manon Lallement, Sylvestre Lacour, Elsa Huby, Guillermo Martin, Kevin Barjot, Guy Perrin, Daniel Rouan, Vincent Lapeyrere, Sebastien Vievard, Olivier Guyon, Julien Lozi, Vincent Deo, Takayuki Kotani, Cecil Pham, Cedric Cassagnettes, Adrien Billat, Nick Cvetojevic, Franck Marchis
{"title":"Photonic chip for visible interferometry: laboratory characterization and comparison with the theoretical model","authors":"Manon Lallement, Sylvestre Lacour, Elsa Huby, Guillermo Martin, Kevin Barjot, Guy Perrin, Daniel Rouan, Vincent Lapeyrere, Sebastien Vievard, Olivier Guyon, Julien Lozi, Vincent Deo, Takayuki Kotani, Cecil Pham, Cedric Cassagnettes, Adrien Billat, Nick Cvetojevic, Franck Marchis","doi":"arxiv-2409.03808","DOIUrl":"https://doi.org/arxiv-2409.03808","url":null,"abstract":"Integrated optics are used to achieve astronomical interferometry inside\u0000robust and compact materials, improving the instruments stability and\u0000sensitivity. In order to perform differential phase measurements at the\u0000H$alpha$ line (656.3 nm) with the 600-800 nm spectro-interferometer FIRST, a\u0000photonic integrated circuit (PIC) is being developed. This PIC performs the\u0000visible combination of the beams coming from the telescope pupil sub-apertures.\u0000In this work, TEEM Photonics waveguides fabricated by $K_+:Na_+$ ion exchange\u0000in glass are characterized in terms of single-mode range and mode field\u0000diameter. The waveguide diffused index profile is modeled on Beamprop software.\u0000FIRST beam combiner building blocks are simulated, especially achromatic\u0000directional couplers and passive $pi/2$ phase shifters for a potential ABCD\u0000interferometric combination.","PeriodicalId":501163,"journal":{"name":"arXiv - PHYS - Instrumentation and Methods for Astrophysics","volume":"57 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142217492","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
Photonic beam-combiner for visible interferometry with SCExAO/FIRST: laboratory characterization and design optimization 利用 SCExAO/FIRST 进行可见光干涉测量的光子合束器:实验室表征和设计优化
arXiv - PHYS - Instrumentation and Methods for Astrophysics Pub Date : 2024-09-05 DOI: arxiv-2409.03476
Manon Lallement, Elsa Huby, Sylvestre Lacour, Guillermo Martin, Kevin Barjot, Guy Perrin, Daniel Rouan, Vincent Lapeyrere, Sebastien Vievard, Olivier Guyon, Julien Lozi, Vincent Deo, Takayuki Kotani, Cecil Pham, Cedric Cassagnettes, Adrien Billat, Nick Cvetojevic, Franck Marchis
{"title":"Photonic beam-combiner for visible interferometry with SCExAO/FIRST: laboratory characterization and design optimization","authors":"Manon Lallement, Elsa Huby, Sylvestre Lacour, Guillermo Martin, Kevin Barjot, Guy Perrin, Daniel Rouan, Vincent Lapeyrere, Sebastien Vievard, Olivier Guyon, Julien Lozi, Vincent Deo, Takayuki Kotani, Cecil Pham, Cedric Cassagnettes, Adrien Billat, Nick Cvetojevic, Franck Marchis","doi":"arxiv-2409.03476","DOIUrl":"https://doi.org/arxiv-2409.03476","url":null,"abstract":"Integrated optics are used to achieve astronomical interferometry inside\u0000robust and compact materials, improving the instrument's stability and\u0000sensitivity. In order to perform differential phase measurements at the\u0000H$alpha$ line (656.3 nm) with the 600-800 nm spectro-interferometer FIRST, a\u0000photonic integrated circuit (PIC) is being developed in collaboration with TEEM\u0000Photonics. This PIC performs the interferometric combination of the beams\u0000coming from sub-apertures selected in the telescope pupil, thus implementing\u0000the pupil remapping technique to restore the diffraction limit of the\u0000telescope. In this work, we report on the latest developments carried out\u0000within the FIRST project to produce a high performance visible PIC. The PICs\u0000are manufactured by TEEM Photonics, using their technology based on $K_+:Na_+$\u0000ion exchange in glass. The first part of the study consists in the experimental\u0000characterization of the fundamental properties of the waveguides, in order to\u0000build an accurate model, which is the basis for the design of more complex\u0000functions. In the second part, theoretical designs and their optimization for\u0000three types of combiner architectures are presented: symmetric directional\u0000coupler, asymmetric directional couplers and ABCD cells including achromatic\u0000phase shifters.","PeriodicalId":501163,"journal":{"name":"arXiv - PHYS - Instrumentation and Methods for Astrophysics","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142217497","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
Mid-order wavefront control for exoplanet imaging: preliminary characterization of the segmented deformable mirror and Zernike wavefront sensor on HiCAT 用于系外行星成像的中阶波前控制:HiCAT 上分段可变形镜和 Zernike 波前传感器的初步鉴定
arXiv - PHYS - Instrumentation and Methods for Astrophysics Pub Date : 2024-09-05 DOI: arxiv-2409.03411
B. Buralli, M. N'Diaye, R. Pourcelot, M. Carbillet, E. H. Por, I. Laginja, L. Canas, S. Steiger, P. Petrone, M. M. Nguyen, B. Nickson, S. F. Redmond, A. Sahoo, L. Pueyo, M. D. Perrin, R. Soummer
{"title":"Mid-order wavefront control for exoplanet imaging: preliminary characterization of the segmented deformable mirror and Zernike wavefront sensor on HiCAT","authors":"B. Buralli, M. N'Diaye, R. Pourcelot, M. Carbillet, E. H. Por, I. Laginja, L. Canas, S. Steiger, P. Petrone, M. M. Nguyen, B. Nickson, S. F. Redmond, A. Sahoo, L. Pueyo, M. D. Perrin, R. Soummer","doi":"arxiv-2409.03411","DOIUrl":"https://doi.org/arxiv-2409.03411","url":null,"abstract":"We study a mid-order wavefront sensor (MOWFS) to address fine cophasing\u0000errors in exoplanet imaging with future large segmented aperture space\u0000telescopes. Observing Earth analogs around Sun-like stars requires contrasts\u0000down to $10^{-10}$ in visible light. One promising solution consists of\u0000producing a high-contrast dark zone in the image of an observed star. In a\u0000space observatory, this dark region will be altered by several effects, and\u0000among them, the small misalignments of the telescope mirror segments due to\u0000fine thermo-mechanical drifts. To correct for these errors in real time, we\u0000investigate a wavefront control loop based on a MOWFS with a Zernike sensor.\u0000Such a MOWFS was installed on the high-contrast imager for complex aperture\u0000telescopes (HiCAT) testbed in Baltimore in June 2023. The bench uses a\u000037-segment Iris-AO deformable mirror to mimic telescope segmentation and some\u0000wavefront control strategies to produce a dark zone with such an aperture. In\u0000this contribution, we first use the MOWFS to characterize the Iris-AO segment\u0000discretization steps. For the central segment, we find a minimal step of\u0000125,$pm$31,pm. This result will help us to assess the contribution of the\u0000Iris-AO DM on the contrast in HiCAT. We then determine the detection limits of\u0000the MOWFS, estimating wavefront error amplitudes of 119 and 102,pm for 10,s\u0000and 1,min exposure time with a SNR of 3. These values inform us about the\u0000measurement capabilities of our wavefront sensor on the testbed. These\u0000preliminary results will be useful to provide insights on metrology and\u0000stability for exo-Earth observations with the Habitable Worlds Observatory.","PeriodicalId":501163,"journal":{"name":"arXiv - PHYS - Instrumentation and Methods for Astrophysics","volume":"17 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142217499","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
Searching for Additional Planets in TESS Multi-Planet Systems: Testing Empirical Models Based on Kepler Data 在 TESS 多行星系统中寻找更多行星:测试基于开普勒数据的经验模型
arXiv - PHYS - Instrumentation and Methods for Astrophysics Pub Date : 2024-09-05 DOI: arxiv-2409.03852
Emma V. Turtelboom, Jamie Dietrich, Courtney D. Dressing, Caleb K. Harada
{"title":"Searching for Additional Planets in TESS Multi-Planet Systems: Testing Empirical Models Based on Kepler Data","authors":"Emma V. Turtelboom, Jamie Dietrich, Courtney D. Dressing, Caleb K. Harada","doi":"arxiv-2409.03852","DOIUrl":"https://doi.org/arxiv-2409.03852","url":null,"abstract":"Multi-planet system architectures are frequently used to constrain possible\u0000formation and evolutionary pathways of observed exoplanets. Therefore,\u0000understanding the predictive and descriptive power of empirical models of these\u0000systems is critical to understanding their formation histories. Additionally,\u0000if empirical models can reproduce architectures over a range of scales, transit\u0000and radial velocity observations can be more easily and effectively used to\u0000inform future microlensing, astrometric, and direct imaging surveys. We analyze\u000052 TESS multi-planet systems previously studied using Dynamite (Dietrich & Apai\u00002020), who used TESS data alongside empirical models based on Kepler planets to\u0000predict additional planets in each system. We analyze additional TESS data to\u0000search for these predicted planets. We thereby evaluate the degree to which\u0000these models can be used to predict planets in TESS multi-planet systems.\u0000Specifically, we study whether a period ratio method or clustered period model\u0000is more predictive. We find that the period ratio model predictions are most\u0000consistent with the planets discovered since 2020, accounting for detection\u0000sensitivity. However, neither model is highly predictive, highlighting the need\u0000for additional data and nuanced models to describe the full population.\u0000Improved eccentricity and dynamical stability prescriptions incorporated into\u0000Dynamite provide a modest improvement in the prediction accuracy. We also find\u0000that the current sample of 183 TESS multi-planet systems are are highly\u0000dynamically packed, and appear truncated relative to detection biases. These\u0000attributes are consistent with the Kepler sample, and suggest a highly\u0000efficient formation process.","PeriodicalId":501163,"journal":{"name":"arXiv - PHYS - Instrumentation and Methods for Astrophysics","volume":"75 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142217495","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
Toward a universal characterization methodology for conversion gain measurement of CMOS APS: application to Euclid and SVOM CMOS APS 转换增益测量的通用表征方法:应用于 Euclid 和 SVOM
arXiv - PHYS - Instrumentation and Methods for Astrophysics Pub Date : 2024-09-05 DOI: arxiv-2409.03374
Jean Le Graët, Aurélia Secroun, Marie Tourneur-Silvain, Éric Kajfasz, Jean-Luc Atteia, Olivier Boulade, Alix Nouvel de la Flèche, Hervé Geoffray, William Gillard, Stéphanie Escoffier, Francis Fortin, Nicolas Fourmanoit, Smaïn Kermiche, Hervé Valentin, Julien Zoubian
{"title":"Toward a universal characterization methodology for conversion gain measurement of CMOS APS: application to Euclid and SVOM","authors":"Jean Le Graët, Aurélia Secroun, Marie Tourneur-Silvain, Éric Kajfasz, Jean-Luc Atteia, Olivier Boulade, Alix Nouvel de la Flèche, Hervé Geoffray, William Gillard, Stéphanie Escoffier, Francis Fortin, Nicolas Fourmanoit, Smaïn Kermiche, Hervé Valentin, Julien Zoubian","doi":"arxiv-2409.03374","DOIUrl":"https://doi.org/arxiv-2409.03374","url":null,"abstract":"With the expanding integration of infrared instruments in astronomical\u0000missions, accurate per-pixel flux estimation for near-infrared hybrid detectors\u0000has become critical to the success of these missions. Based on CPPM's\u0000involvement in both SVOM/Colibri and Euclid missions, this study introduces\u0000universally applicable methods and framework for characterizing IR hybrid\u0000detectors and decorrelating their intrinsic properties. The characterization\u0000framework, applied to the ALFA detector and Euclid's H2RG, not only validates\u0000the proposed methods but also points out subtle behaviors inherent to each\u0000detector.","PeriodicalId":501163,"journal":{"name":"arXiv - PHYS - Instrumentation and Methods for Astrophysics","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142217500","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
ESCAPE project: fundamental detection limits of JWST/NIRCam coronographic observations ESCAPE项目:JWST/NIRCam冠状成像观测的基本探测极限
arXiv - PHYS - Instrumentation and Methods for Astrophysics Pub Date : 2024-09-05 DOI: arxiv-2409.03485
N. Godoy, E. Choquet, L. Altinier, A. Lau, R. Mayer, A. Vigan, D. Mary
{"title":"ESCAPE project: fundamental detection limits of JWST/NIRCam coronographic observations","authors":"N. Godoy, E. Choquet, L. Altinier, A. Lau, R. Mayer, A. Vigan, D. Mary","doi":"arxiv-2409.03485","DOIUrl":"https://doi.org/arxiv-2409.03485","url":null,"abstract":"In this study, we explored the fundamental contrast limit of NIRCam\u0000coronagraphy observations, representing the achievable performance with\u0000post-processing techniques. This limit is influenced by photon noise and\u0000readout noise, with complex noise propagation through post-processing methods\u0000like principal component analysis. We employed two approaches: developing a\u0000formula based on simplified scenarios and using Markov Chain Monte Carlo (MCMC)\u0000methods, assuming Gaussian noise properties and uncorrelated pixel noise.\u0000Tested on datasets HIP,65426, AF,Lep, and HD,114174, the MCMC method\u0000provided accurate but computationally intensive estimates. The analytical\u0000approach offered quick, reliable estimates closely matching MCMC results in\u0000simpler scenarios. Our findings showed the fundamental contrast curve is\u0000significantly deeper than the current achievable contrast limit obtained with\u0000post-processing techniques at shorter separations, being 10 times deeper at\u0000$0.5''$ and 4 times deeper at $1''$. At greater separations, increased exposure\u0000time improves sensitivity, with the transition between photon and readout noise\u0000dominance occurring between $2''$ and $3''$. We conclude the analytical\u0000approach is a reliable estimate of the fundamental contrast limit, offering a\u0000faster alternative to MCMC. These results emphasize the potential for greater\u0000sensitivity at shorter separations, highlighting the need for improved or new\u0000post-processing techniques to enhance JWST NIRCam sensitivity or contrast\u0000curve.","PeriodicalId":501163,"journal":{"name":"arXiv - PHYS - Instrumentation and Methods for Astrophysics","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142217521","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
Accurate calibration spectra for precision radial velocities -- Iodine absorption referenced by a laser frequency comb 用于精确径向速度的精确校准光谱 -- 以激光频率梳为参照的碘吸收率
arXiv - PHYS - Instrumentation and Methods for Astrophysics Pub Date : 2024-09-04 DOI: arxiv-2409.02631
Ansgar Reiners, Michael Debus, Sebastian Schäfer, Eberhard Tiemann, Mathias Zechmeister
{"title":"Accurate calibration spectra for precision radial velocities -- Iodine absorption referenced by a laser frequency comb","authors":"Ansgar Reiners, Michael Debus, Sebastian Schäfer, Eberhard Tiemann, Mathias Zechmeister","doi":"arxiv-2409.02631","DOIUrl":"https://doi.org/arxiv-2409.02631","url":null,"abstract":"Astronomical spectrographs require frequency calibration through sources like\u0000hollow-cathode lamps or absorption-gas cells. Laser frequency combs (LFCs)\u0000provide highest accuracy but are facing operational challenges. We aim to\u0000provide a precise and accurate frequency solution for the spectrum of molecular\u0000iodine absorption by referencing to an LFC that does not cover the same\u0000frequency range. We used a Fourier Transform Spectrometer (FTS) to produce a\u0000consistent frequency scale for the combined spectrum from an iodine absorption\u0000cell at 5200--6200AA and an LFC at 8200AA. We used 17,807 comb lines to\u0000determine the FTS frequency offset and compared the calibrated iodine spectrum\u0000to a synthetic spectrum computed from a molecular potential model. In a single\u0000scan, the frequency offset was determined from the comb spectrum with an\u0000uncertainty of $sim$1 cm s$^{-1}$. The distribution of comb line frequencies\u0000is consistent with no deviation from linearity. The iodine observation matches\u0000the model with an offset of smaller than the model uncertainties of $sim$1 m\u0000s$^{-1}$, which confirms that the FTS zero point is valid outside the range\u0000covered by the LFC, and that the frequencies of the iodine absorption model are\u0000accurate. We also report small systematic effects regarding the iodine model's\u0000energy scale. We conclude that Fourier Transform Spectrometry can transfer LFC\u0000accuracy into frequency ranges not originally covered by the comb. This allows\u0000us to assign accurate frequency scales to the spectra of customized wavelength\u0000calibrators. The calibrators can be optimized for individual spectrograph\u0000designs regarding resolution and spectral bandwidth, and requirements on their\u0000long-term stability are relaxed because FTS monitoring can be performed during\u0000operation. This provides flexibility for the design and operation of\u0000calibration sources for high-precision Doppler experiments.","PeriodicalId":501163,"journal":{"name":"arXiv - PHYS - Instrumentation and Methods for Astrophysics","volume":"43 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142217505","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
Superfluid-tight cryogenic receiver with continuous sub-Kelvin cooling for EXCLAIM 为 EXCLAIM 提供持续亚开尔文冷却的超流体密封低温接收器
arXiv - PHYS - Instrumentation and Methods for Astrophysics Pub Date : 2024-09-04 DOI: arxiv-2409.02847
Sumit Dahal, Peter A. R. Ade, Christopher J. Anderson, Alyssa Barlis, Emily M. Barrentine, Jeffrey W. Beeman, Nicholas Bellis, Alberto D. Bolatto, Victoria Braianova, Patrick C. Breysse, Berhanu T. Bulcha, Giuseppe Cataldo, Felipe A. Colazo, Lee-Roger Chevres-Fernandez, Chullhee Cho, Danny S. Chmaytelli, Jake A. Connors, Nicholas P. Costen, Paul W. Cursey, Negar Ehsan, Thomas M. Essinger-Hileman, Jason Glenn, Joseph E. Golec, James P. Hays-Wehle, Larry A. Hess, Amir E. Jahromi, Trevian Jenkins, Mark O. Kimball, Alan J. Kogut, Samuel H. Kramer, Nicole Leung, Luke N. Lowe, Philip D. Mauskopf, Jeffrey J. McMahon, Vilem Mikula, Mona Mirzaei, Samuel H. Moseley, Jonas W. Mugge-Durum, Jacob Nellis, Omid Noroozian, Kate Okun, Trevor Oxholm, Tatsat Parekh, Ue-Li Pen, Anthony R. Pullen, Maryam Rahmani, Mathias M. Ramirez, Cody Roberson, Samelys Rodriguez, Florian Roselli, Deepak Sapkota, Konrad Shire, Gage L. Siebert, Faizah Siddique, Adrian K. Sinclair, Rachel S. Somerville, Ryan Stephenson, Thomas R. Stevenson, Eric R. Switzer, Jared Termini, Peter T. Timbie, Justin Trenkamp, Carole E. Tucker, Elijah Visbal, Carolyn G. Volpert, Joseph Watson, Eric Weeks, Edward J. Wollack, Shengqi Yang, Aaron Yung
{"title":"Superfluid-tight cryogenic receiver with continuous sub-Kelvin cooling for EXCLAIM","authors":"Sumit Dahal, Peter A. R. Ade, Christopher J. Anderson, Alyssa Barlis, Emily M. Barrentine, Jeffrey W. Beeman, Nicholas Bellis, Alberto D. Bolatto, Victoria Braianova, Patrick C. Breysse, Berhanu T. Bulcha, Giuseppe Cataldo, Felipe A. Colazo, Lee-Roger Chevres-Fernandez, Chullhee Cho, Danny S. Chmaytelli, Jake A. Connors, Nicholas P. Costen, Paul W. Cursey, Negar Ehsan, Thomas M. Essinger-Hileman, Jason Glenn, Joseph E. Golec, James P. Hays-Wehle, Larry A. Hess, Amir E. Jahromi, Trevian Jenkins, Mark O. Kimball, Alan J. Kogut, Samuel H. Kramer, Nicole Leung, Luke N. Lowe, Philip D. Mauskopf, Jeffrey J. McMahon, Vilem Mikula, Mona Mirzaei, Samuel H. Moseley, Jonas W. Mugge-Durum, Jacob Nellis, Omid Noroozian, Kate Okun, Trevor Oxholm, Tatsat Parekh, Ue-Li Pen, Anthony R. Pullen, Maryam Rahmani, Mathias M. Ramirez, Cody Roberson, Samelys Rodriguez, Florian Roselli, Deepak Sapkota, Konrad Shire, Gage L. Siebert, Faizah Siddique, Adrian K. Sinclair, Rachel S. Somerville, Ryan Stephenson, Thomas R. Stevenson, Eric R. Switzer, Jared Termini, Peter T. Timbie, Justin Trenkamp, Carole E. Tucker, Elijah Visbal, Carolyn G. Volpert, Joseph Watson, Eric Weeks, Edward J. Wollack, Shengqi Yang, Aaron Yung","doi":"arxiv-2409.02847","DOIUrl":"https://doi.org/arxiv-2409.02847","url":null,"abstract":"The EXperiment for Cryogenic Large-Aperture Intensity Mapping (EXCLAIM) is a\u0000balloon-borne telescope designed to survey star formation over cosmological\u0000time scales using intensity mapping in the 420 - 540 GHz frequency range.\u0000EXCLAIM uses a fully cryogenic telescope coupled to six on-chip spectrometers\u0000featuring kinetic inductance detectors (KIDs) to achieve high sensitivity,\u0000allowing for fast integration in dark atmospheric windows. The telescope\u0000receiver is cooled to $approx$ 1.7 K by immersion in a superfluid helium bath\u0000and enclosed in a superfluid-tight shell with a meta-material anti-reflection\u0000coated silicon window. In addition to the optics and the spectrometer package,\u0000the receiver contains the magnetic shielding, the cryogenic segment of the\u0000spectrometer readout, and the sub-Kelvin cooling system. A three-stage\u0000continuous adiabatic demagnetization refrigerator (CADR) keeps the detectors at\u0000100 mK while a $^4$He sorption cooler provides a 900 mK thermal intercept for\u0000mechanical suspensions and coaxial cables. We present the design of the EXCLAIM\u0000receiver and report on the flight-like testing of major receiver components,\u0000including the superfluid-tight receiver window and the sub-Kelvin coolers.","PeriodicalId":501163,"journal":{"name":"arXiv - PHYS - Instrumentation and Methods for Astrophysics","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142217504","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
Rapid Automatic Multiple Moving Objects Detection Method Based on Feature Extraction from Images with Non-sidereal Tracking 基于图像特征提取和非实时跟踪的多运动物体快速自动检测方法
arXiv - PHYS - Instrumentation and Methods for Astrophysics Pub Date : 2024-09-04 DOI: arxiv-2409.02405
Lei Wang, Xiaoming Zhang, Chunhai Bai, Haiwen Xie, Juan Li, Jiayi Ge, Jianfeng Wang, Xianqun Zeng, Jiantao Sun, Xiaojun Jiang
{"title":"Rapid Automatic Multiple Moving Objects Detection Method Based on Feature Extraction from Images with Non-sidereal Tracking","authors":"Lei Wang, Xiaoming Zhang, Chunhai Bai, Haiwen Xie, Juan Li, Jiayi Ge, Jianfeng Wang, Xianqun Zeng, Jiantao Sun, Xiaojun Jiang","doi":"arxiv-2409.02405","DOIUrl":"https://doi.org/arxiv-2409.02405","url":null,"abstract":"Optically observing and monitoring moving objects, both natural and\u0000artificial, is important to human space security. Non-sidereal tracking can\u0000improve the system's limiting magnitude for moving objects, which benefits the\u0000surveillance. However, images with non-sidereal tracking include complex\u0000background, as well as objects with different brightness and moving mode,\u0000posing a significant challenge for accurate multi-object detection in such\u0000images, especially in wide field of view (WFOV) telescope images. To achieve a\u0000higher detection precision in a higher speed, we proposed a novel object\u0000detection method, which combines the source feature extraction and the neural\u0000network. First, our method extracts object features from optical images such as\u0000centroid, shape, and flux. Then it conducts a naive labeling based on those\u0000features to distinguish moving objects from stars. After balancing the labeled\u0000data, we employ it to train a neural network aimed at creating a classification\u0000model for point-like and streak-like objects. Ultimately, based on the neural\u0000network model's classification outcomes, moving objects whose motion modes\u0000consistent with the tracked objects are detected via track association, while\u0000objects with different motion modes are detected using morphological\u0000statistics. The validation, based on the space objects images captured in\u0000target tracking mode with the 1-meter telescope at Nanshan, Xinjiang\u0000Astronomical Observatory, demonstrates that our method achieves 94.72%\u0000detection accuracy with merely 5.02% false alarm rate, and a processing time of\u00000.66s per frame. Consequently, our method can rapidly and accurately detect\u0000objects with different motion modes from wide-field images with non-sidereal\u0000tracking.","PeriodicalId":501163,"journal":{"name":"arXiv - PHYS - Instrumentation and Methods for Astrophysics","volume":"13 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142217510","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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