AppleCiDEr II: SpectraNet -- A Deep Learning Network for Spectroscopic Data
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| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866914141927636992 |
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| author | Xu, Maojie Sasli, Argyro Junell, Alexandra Nunes, Felipe Fontinele Qin, Yu-Jing Fremling, Christoffer Rose, Sam Laz, Theophile Jegou Du Border, Benny Calloch, Antoine Le Chaudhary, Sushant Sharma Markoff, Hailey Raghuvanshi, Avyukt Rehemtulla, Nabeel Sollerman, Jesper Sharma, Yashvi Sravan, Niharika Adler, Judy Chen, Tracy X. Dekany, Richard Riddle, Reed Kasliwal, Mansi M. Graham, Matthew J. Coughlin, Michael W. |
| author_facet | Xu, Maojie Sasli, Argyro Junell, Alexandra Nunes, Felipe Fontinele Qin, Yu-Jing Fremling, Christoffer Rose, Sam Laz, Theophile Jegou Du Border, Benny Calloch, Antoine Le Chaudhary, Sushant Sharma Markoff, Hailey Raghuvanshi, Avyukt Rehemtulla, Nabeel Sollerman, Jesper Sharma, Yashvi Sravan, Niharika Adler, Judy Chen, Tracy X. Dekany, Richard Riddle, Reed Kasliwal, Mansi M. Graham, Matthew J. Coughlin, Michael W. |
| contents | Time-domain surveys such as the Zwicky Transient Facility (ZTF) have opened a new frontier in the discovery and characterization of transients. While photometric light curves provide broad temporal coverage, spectroscopic observations remain crucial for physical interpretation and source classification. However, existing spectral analysis methods -- often reliant on template fitting or parametric models -- are limited in their ability to capture the complex and evolving spectra characteristic of such sources, which are sometimes only available at low resolution. In this work, we introduce SpectraNet, a deep convolutional neural network designed to learn robust representations of optical spectra from transients. Our model combines multi-scale convolution kernels and multi-scale pooling to extract features from preprocessed spectra in a hierarchical and interpretable manner. We train and validate SpectraNet on low-resolution time-series spectra obtained from the Spectral Energy Distribution Machine (SEDM) and other instruments, demonstrating state-of-the-art performance in classification. Furthermore, in redshift prediction tasks, SpectraNet achieves a root mean squared relative redshift error of 0.02, highlighting its effectiveness in precise regression tasks as well. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_07215 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | AppleCiDEr II: SpectraNet -- A Deep Learning Network for Spectroscopic Data Xu, Maojie Sasli, Argyro Junell, Alexandra Nunes, Felipe Fontinele Qin, Yu-Jing Fremling, Christoffer Rose, Sam Laz, Theophile Jegou Du Border, Benny Calloch, Antoine Le Chaudhary, Sushant Sharma Markoff, Hailey Raghuvanshi, Avyukt Rehemtulla, Nabeel Sollerman, Jesper Sharma, Yashvi Sravan, Niharika Adler, Judy Chen, Tracy X. Dekany, Richard Riddle, Reed Kasliwal, Mansi M. Graham, Matthew J. Coughlin, Michael W. Instrumentation and Methods for Astrophysics High Energy Astrophysical Phenomena Time-domain surveys such as the Zwicky Transient Facility (ZTF) have opened a new frontier in the discovery and characterization of transients. While photometric light curves provide broad temporal coverage, spectroscopic observations remain crucial for physical interpretation and source classification. However, existing spectral analysis methods -- often reliant on template fitting or parametric models -- are limited in their ability to capture the complex and evolving spectra characteristic of such sources, which are sometimes only available at low resolution. In this work, we introduce SpectraNet, a deep convolutional neural network designed to learn robust representations of optical spectra from transients. Our model combines multi-scale convolution kernels and multi-scale pooling to extract features from preprocessed spectra in a hierarchical and interpretable manner. We train and validate SpectraNet on low-resolution time-series spectra obtained from the Spectral Energy Distribution Machine (SEDM) and other instruments, demonstrating state-of-the-art performance in classification. Furthermore, in redshift prediction tasks, SpectraNet achieves a root mean squared relative redshift error of 0.02, highlighting its effectiveness in precise regression tasks as well. |
| title | AppleCiDEr II: SpectraNet -- A Deep Learning Network for Spectroscopic Data |
| topic | Instrumentation and Methods for Astrophysics High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2510.07215 |