Search for the optimal smoothing method to improve S/N in cosmic maser spectra
In this article, a number of smoothing methods were investigated to enhance the signal-to-noise (S/N) ratio of diverse methanol maser spectral data, encompassing variations in signal strength, multiplicity of peaks, and spectral complexity. The study aimed to improve the accuracy and reliability of...
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| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
De Gruyter
2025-06-01
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| Series: | Open Astronomy |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/astro-2025-0012 |
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| Summary: | In this article, a number of smoothing methods were investigated to enhance the signal-to-noise (S/N) ratio of diverse methanol maser spectral data, encompassing variations in signal strength, multiplicity of peaks, and spectral complexity. The study aimed to improve the accuracy and reliability of astronomical measurements obtained with Irbene radio telescopes RT-16 and RT-32 at the Ventspils International Radio Astronomy Center. Comparing eleven different smoothing techniques, including moving average, Gaussian, Hanning, among others, the Savitzky–Golay smoothing method is identified as the optimal choice. The evaluation criteria included the preservation of spectral features, reduction of noise artifacts, and enhancement of S/N ratio metrics. The Savitzky–Golay method outperformed other techniques by effectively balancing noise reduction with the preservation of spectral details crucial for maser emission analysis. |
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| ISSN: | 2543-6376 |