Multi-star calibration in starphotometry
We explored the improvement in starphotometry accuracy using a multi-star Langley calibration in lieu of the more traditional one-star Langley approach. Our goal was a 0.01 calibration-constant repeatability accuracy, at an operational sea-level facility such as our Arctic site at Eureka. Multi-star...
Published in: | Atmospheric Measurement Techniques |
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2023
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Online Access: | https://doi.org/10.5194/amt-16-6111-2023 https://amt.copernicus.org/articles/16/6111/2023/ |
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ftcopernicus:oai:publications.copernicus.org:amt112648 2024-01-21T10:03:43+01:00 Multi-star calibration in starphotometry Ivănescu, Liviu O'Neill, Norman T. 2023-12-22 application/pdf https://doi.org/10.5194/amt-16-6111-2023 https://amt.copernicus.org/articles/16/6111/2023/ eng eng doi:10.5194/amt-16-6111-2023 https://amt.copernicus.org/articles/16/6111/2023/ eISSN: 1867-8548 Text 2023 ftcopernicus https://doi.org/10.5194/amt-16-6111-2023 2023-12-25T17:24:15Z We explored the improvement in starphotometry accuracy using a multi-star Langley calibration in lieu of the more traditional one-star Langley approach. Our goal was a 0.01 calibration-constant repeatability accuracy, at an operational sea-level facility such as our Arctic site at Eureka. Multi-star calibration errors were systematically smaller than single-star errors and, in the mid-spectrum, approached the 0.01 target for an observing period of 2.5 h. Filtering out coarse-mode (supermicrometre) contributions appears mandatory for improvements. Spectral vignetting, likely linked to significant UV/blue spectrum errors at large air mass, may be due to a limiting field of view and/or sub-optimal telescope collimation. Starphotometer measurements acquired by instruments that have been designed to overcome such effects may improve future star magnitude catalogues and consequently starphotometry accuracy. Text Arctic Copernicus Publications: E-Journals Arctic Eureka ENVELOPE(-85.940,-85.940,79.990,79.990) Atmospheric Measurement Techniques 16 24 6111 6121 |
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Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
We explored the improvement in starphotometry accuracy using a multi-star Langley calibration in lieu of the more traditional one-star Langley approach. Our goal was a 0.01 calibration-constant repeatability accuracy, at an operational sea-level facility such as our Arctic site at Eureka. Multi-star calibration errors were systematically smaller than single-star errors and, in the mid-spectrum, approached the 0.01 target for an observing period of 2.5 h. Filtering out coarse-mode (supermicrometre) contributions appears mandatory for improvements. Spectral vignetting, likely linked to significant UV/blue spectrum errors at large air mass, may be due to a limiting field of view and/or sub-optimal telescope collimation. Starphotometer measurements acquired by instruments that have been designed to overcome such effects may improve future star magnitude catalogues and consequently starphotometry accuracy. |
format |
Text |
author |
Ivănescu, Liviu O'Neill, Norman T. |
spellingShingle |
Ivănescu, Liviu O'Neill, Norman T. Multi-star calibration in starphotometry |
author_facet |
Ivănescu, Liviu O'Neill, Norman T. |
author_sort |
Ivănescu, Liviu |
title |
Multi-star calibration in starphotometry |
title_short |
Multi-star calibration in starphotometry |
title_full |
Multi-star calibration in starphotometry |
title_fullStr |
Multi-star calibration in starphotometry |
title_full_unstemmed |
Multi-star calibration in starphotometry |
title_sort |
multi-star calibration in starphotometry |
publishDate |
2023 |
url |
https://doi.org/10.5194/amt-16-6111-2023 https://amt.copernicus.org/articles/16/6111/2023/ |
long_lat |
ENVELOPE(-85.940,-85.940,79.990,79.990) |
geographic |
Arctic Eureka |
geographic_facet |
Arctic Eureka |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
eISSN: 1867-8548 |
op_relation |
doi:10.5194/amt-16-6111-2023 https://amt.copernicus.org/articles/16/6111/2023/ |
op_doi |
https://doi.org/10.5194/amt-16-6111-2023 |
container_title |
Atmospheric Measurement Techniques |
container_volume |
16 |
container_issue |
24 |
container_start_page |
6111 |
op_container_end_page |
6121 |
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1788694028175278080 |