دورية أكاديمية
Mitigating Radio Frequency Interference in CHIME/FRB Real-time Intensity Data
| العنوان: | Mitigating Radio Frequency Interference in CHIME/FRB Real-time Intensity Data |
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| المؤلفون: | Masoud Rafiei-Ravandi, Kendrick M. Smith |
| المصدر: | The Astrophysical Journal Supplement Series, Vol 265, Iss 2, p 62 (2023) |
| بيانات النشر: | IOP Publishing, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Astrophysics |
| مصطلحات موضوعية: | High energy astrophysics, Radio telescopes, Radio transient sources, Astrophysics, QB460-466 |
| الوصف: | Extragalactic fast radio bursts (FRBs) are a new class of astrophysical transient with unknown origins that have become a main focus of radio observatories worldwide. FRBs are highly energetic (∼10 ^36 –10 ^42 erg) flashes that last for about a millisecond. Thanks to its broad bandwidth (400–800 MHz), large field of view (∼200 sq. deg.), and massive data rate (1500 TB of coherently beamformed data per day), the Canadian Hydrogen Intensity Mapping Experiment / Fast Radio Burst (CHIME/FRB) project has increased the total number of discovered FRBs by over a factor 10 in 3 yr of operation. CHIME/FRB observations are hampered by the constant exposure to radio frequency interference (RFI) from artificial devices (e.g., cellular phones, aircraft), resulting in ∼20% loss of bandwidth. In this work, we describe our novel technique for mitigating RFI in CHIME/FRB real-time intensity data. We mitigate RFI through a sequence of iterative operations, which mask out statistical outliers from frequency-channelized intensity data that have been effectively high-pass filtered. Keeping false-positive and false-negative rates at very low levels, our approach is useful for any high-performance surveys of radio transients in the future. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 1538-4365 0067-0049 |
| العلاقة: | https://doaj.org/toc/0067-0049Test |
| DOI: | 10.3847/1538-4365/acc252 |
| الوصول الحر: | https://doaj.org/article/513d3e4ab8f94551b0a583c42254e675Test |
| رقم الانضمام: | edsdoj.513d3e4ab8f94551b0a583c42254e675 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 15384365 00670049 |
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| DOI: | 10.3847/1538-4365/acc252 |