On the nature of apparent transient sources on the National Geographic Society-Palomar Observatory Sky Survey glass copy plates
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arXiv
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| Autores principales: | , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866909145992527872 |
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| author | Hambly, Nigel Blair, Adam |
| author_facet | Hambly, Nigel Blair, Adam |
| contents | We examine critically recent claims for the presence of above-atmosphere optical transients in publicly-available digitised scans of Schmidt telescope photographic plate material derived from the National Geographic Society-Palomar Observatory Sky Survey. We employ the publicly available SuperCOSMOS Sky Survey catalogues to examine statistically the morphology of the sources. We develop a simple, objective and automated image classification scheme based on a random forest decision tree classifier. We find that the putative transients are likely to be spurious artefacts of the photographic emulsion. We suggest a possible cause of the appearance of these images as resulting from the copying procedure employed to disseminate glass copy survey atlas sets in the era before large-scale digitisation programmes. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_00497 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | On the nature of apparent transient sources on the National Geographic Society-Palomar Observatory Sky Survey glass copy plates Hambly, Nigel Blair, Adam Instrumentation and Methods for Astrophysics We examine critically recent claims for the presence of above-atmosphere optical transients in publicly-available digitised scans of Schmidt telescope photographic plate material derived from the National Geographic Society-Palomar Observatory Sky Survey. We employ the publicly available SuperCOSMOS Sky Survey catalogues to examine statistically the morphology of the sources. We develop a simple, objective and automated image classification scheme based on a random forest decision tree classifier. We find that the putative transients are likely to be spurious artefacts of the photographic emulsion. We suggest a possible cause of the appearance of these images as resulting from the copying procedure employed to disseminate glass copy survey atlas sets in the era before large-scale digitisation programmes. |
| title | On the nature of apparent transient sources on the National Geographic Society-Palomar Observatory Sky Survey glass copy plates |
| topic | Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2402.00497 |