تقرير
SAUNAS I: Searching for Low Surface Brightness X-ray Emission with Chandra/ACIS
| العنوان: | SAUNAS I: Searching for Low Surface Brightness X-ray Emission with Chandra/ACIS |
|---|---|
| المؤلفون: | Borlaff, Alejandro S., Marcum, Pamela M., Alpaslan, Mehmet, Temi, Pasquale, Chamba, Nushkia, Chojnowski, Drew S., Fanelli, Michael N., Koekemoer, Anton M., Laine, Seppo, Lopez-Rodriguez, Enrique, Siemiginowska, Aneta |
| سنة النشر: | 2024 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Astrophysics of Galaxies, Astrophysics - High Energy Astrophysical Phenomena, Astrophysics - Instrumentation and Methods for Astrophysics |
| الوصف: | We present SAUNAS (Selective Amplification of Ultra Noisy Astronomical Signal), a pipeline designed for detecting diffuse X-ray emission in the data obtained with the Advanced CCD Imaging Spectrometer (ACIS) of the Chandra X-ray Observatory. SAUNAS queries the available observations in the Chandra archive, performs photometric calibration, PSF (point spread function) modeling, and deconvolution, point-source removal, adaptive smoothing, and background correction. This pipeline builds on existing and well-tested software including CIAO, VorBin, and LIRA. We characterize the performance of SAUNAS through several quality performance tests, and demonstrate the broad applications and capabilities of SAUNAS using two galaxies already known to show X-ray emitting structures. SAUNAS successfully detects the 30 kpc X-ray super-wind of NGC 3079 using Chandra/ACIS datasets, matching the spatial distribution detected with more sensitive XMM-Newton observations. The analysis performed by SAUNAS reveals an extended low surface brightness source in the field of UGC 5101 in the 0.3-1.0 keV and 1.0-2.0 keV bands. This source is potentially a background galaxy cluster or a hot gas plume associated with UGC 5101. SAUNAS demonstrates its ability to recover previously undetected structures in archival data, expanding exploration into the low surface brightness X-ray universe with Chandra/ACIS. Comment: Accepted for publication in The Astrophysical Journal. 27 pages, 19 figures. The SAUNAS X-ray surface brightness and signal-to-noise maps of NGC 3079 and UGC 5101 are publicly available in Zenodo in FITS format: https://zenodo.org/records/10892485. DOI: 10.5281/zenodo.10892485. The list of Chandra datasets, obtained by the Chandra X-ray Observatory, are contained in DOI: 10.25574/cdc.225 |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2405.01625 |
| رقم الأكسشن: | edsarx.2405.01625 |
| قاعدة البيانات: | arXiv |
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