Reference Calibration for Precision Dark Energy Measurement

用于精密暗能量测量的参考校准

基本信息

  • 批准号:
    341310-2012
  • 负责人:
  • 金额:
    $ 1.82万
  • 依托单位:
  • 依托单位国家:
    加拿大
  • 项目类别:
    Discovery Grants Program - Individual
  • 财政年份:
    2015
  • 资助国家:
    加拿大
  • 起止时间:
    2015-01-01 至 2016-12-31
  • 项目状态:
    已结题

项目摘要

Uncertainties on photometric standards now constitute the dominant uncertainty on our knowledge of dark energy. Additionally, they constitute a significant systematic for measurements of stellar population in galaxy cluster counts, and upcoming photometric redshift surveys measuring growth of structure. There are prospects for improvement in uncertainties from standard star flux, but the traditional techniques of measurement of stellar flux from above the atmosphere suffer from basic and inherent problems: the variability of all stellar sources, and the difficulty of creating a precisely calibrated, cross-checked, and stable platform for observation above Earth's atmosphere. We are undertaking a program of research to understand and profoundly reduce the many astrophysical and cosmological uncertainties due to photometry. Presently, together with colleagues at Toronto, McGill, NRC-INMS, and U.S. institutions, we have designed and constructed payloads for high-altitude balloons containing both monochromatic light sources and radiometric calibration. Our balloon flights have begun to overfly observatories, starting with our initial test flight in New Hampshire in August 2011, and continuing with a campaign of flights over the Univ. of New Mexico campus observatory and Mt. Hopkins in Arizona in 2012, and the following year with the CTIO and Las Campanas observatories in Chile. We have constructed and are the responsible party for the payload optics, including the light source, integrating sphere, and regulated power supply. As well as our initial free-flying balloon payload, both a teststand, and a calibrated payload on a tethered weather balloon, are taking data on an optical table and with the new 32" UVic telescope observatory, respectively. Together with an RTI grant with Canadian colleagues submitted separately, we presently request funding for an MSc student to analyze the data from the overflights, as well as from our calibrated lightsource observations at UVic. The longer-term goals of the program are calibrated sources on a nanosatellite, as well as on a controlled high-altitude miniature blimp, to fly directly "in front of" SNIa, and allow observatories across the world to reach the then-technology-limited precision of 0.01% photometry.
光度标准的不确定性现在构成了我们对暗能量知识的主要不确定性。此外,它们构成了一个重要的系统,用于测量星系团计数中的恒星数量,以及即将进行的测量结构增长的光度红移测量。标准恒星流量的不确定度有改善的前景,但从大气层上方测量恒星流量的传统技术受到基本和固有问题的困扰:所有恒星源的可变性,以及创建一个精确校准、交叉检查和稳定的地球大气层上方观测平台的难度。我们正在进行一项研究计划,以了解和深刻地减少由于光度学而产生的许多天体物理和宇宙学的不确定性。目前,我们与多伦多、McGill、NRC-INMS和美国机构的同事一起,设计和建造了包含单色光源和辐射定标的高空气球的有效载荷。我们的气球飞行已经开始飞越天文台,从2011年8月我们在新汉普郡的首次试飞开始,并继续在大学上空进行飞行活动。新墨西哥州校园天文台和Mt.2012年在亚利桑那州的霍普金斯大学,第二年在智利的CTIO和拉斯坎帕纳斯天文台。我们已经建造并负责有效载荷光学系统,包括光源、积分球和稳压电源。除了我们最初的自由飞行气球有效载荷,测试台和系留天气气球上的校准有效载荷分别在光学表和新的32英寸紫外线望远镜天文台上获取数据。连同与加拿大同事单独提交的RTI资助,我们目前申请资助一名理科学生分析飞越飞行的数据,以及我们在UVic校准的光源观测数据。该计划的长期目标是在纳米卫星和受控高空微型软式飞艇上校准光源,直接在SNIa的前面飞行,并使世界各地的天文台达到当时技术有限的0.01%光度测量的精度。

项目成果

期刊论文数量(0)
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Albert, Justin其他文献

Albert, Justin的其他文献

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{{ truncateString('Albert, Justin', 18)}}的其他基金

Precision calibration, communication, and Earth observation using a miniature stratospheric platform
使用微型平流层平台进行精密校准、通信和地球观测
  • 批准号:
    DGDND-2022-04514
  • 财政年份:
    2022
  • 资助金额:
    $ 1.82万
  • 项目类别:
    DND/NSERC Discovery Grant Supplement
Precision calibration, communication, and Earth observation using a miniature stratospheric platform
使用微型平流层平台进行精密校准、通信和地球观测
  • 批准号:
    RGPIN-2022-04514
  • 财政年份:
    2022
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Discovery Grants Program - Individual
Laser dlode module and optical fiber technology updates with world star tech
激光二极管模块和光纤技术与世界明星技术同步更新
  • 批准号:
    536982-2018
  • 财政年份:
    2018
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Connect Grants Level 1
Reference Calibration for Precision Dark Energy Measurement
用于精密暗能量测量的参考校准
  • 批准号:
    341310-2012
  • 财政年份:
    2016
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Discovery Grants Program - Individual
Reference Calibration for Precision Dark Energy Measurement
用于精密暗能量测量的参考校准
  • 批准号:
    341310-2012
  • 财政年份:
    2014
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Discovery Grants Program - Individual
Reference Calibration for Precision Dark Energy Measurement
用于精密暗能量测量的参考校准
  • 批准号:
    341310-2012
  • 财政年份:
    2013
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Discovery Grants Program - Individual
Reference Calibration for Precision Dark Energy Measurement
用于精密暗能量测量的参考校准
  • 批准号:
    341310-2012
  • 财政年份:
    2012
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Discovery Grants Program - Individual

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    Grant-in-Aid for Scientific Research (B)
Precision calibration, communication, and Earth observation using a miniature stratospheric platform
使用微型平流层平台进行精密校准、通信和地球观测
  • 批准号:
    DGDND-2022-04514
  • 财政年份:
    2022
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    DND/NSERC Discovery Grant Supplement
Precision calibration, communication, and Earth observation using a miniature stratospheric platform
使用微型平流层平台进行精密校准、通信和地球观测
  • 批准号:
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通过树木年轮的高精度 14C 测量来提高弥生期至甲府期年龄校准的分辨率。
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  • 财政年份:
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  • 财政年份:
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  • 财政年份:
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Reference Calibration for Precision Dark Energy Measurement
用于精密暗能量测量的参考校准
  • 批准号:
    341310-2012
  • 财政年份:
    2016
  • 资助金额:
    $ 1.82万
  • 项目类别:
    Discovery Grants Program - Individual
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