spidx
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spidx [2017/05/15 08:36] – fdg | spidx [2018/01/08 14:42] – [Acknowledgements] fdg | ||
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====== TGSS-NVSS spectral index maps and catalog ====== | ====== TGSS-NVSS spectral index maps and catalog ====== | ||
=== Science team: Francesco de Gasperin (Leiden), Huib T. Intema (Leiden) & Dale A. Frail (NRAO) === | === Science team: Francesco de Gasperin (Leiden), Huib T. Intema (Leiden) & Dale A. Frail (NRAO) === | ||
- | We produced a spectral index catalog matching specially re-processed images from two radio surveys at different frequencies: | + | We produced a spectral index catalog matching specially re-processed images from two radio surveys at different frequencies: |
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{{ wiki: | {{ wiki: | ||
- | The final spectral index catalogue has 1 392 563 entries, of which 502,170 (36%) are full detections (source type: S, C, or M), 843,104 (61%) are lower limits (L), and 6,383 (<1%) are upper limits (U). Entries marked as island (I) are 40,906 (3%). The high number of lower limits is due to the higher sensitivity of NVSS with respect to TGSS. | + | The final spectral index catalogue has 1 396 515 entries, of which 503,647 (36%) are full detections (source type: S, C, or M), 845,459 (61%) are lower limits (L), and 6,386 (<1%) are upper limits (U). Entries marked as island (I) are 41,023 (3%). The high number of lower limits is due to the higher sensitivity of NVSS with respect to TGSS. |
The spectral index catalog can be downloaded here: | The spectral index catalog can be downloaded here: | ||
- | * [[http:// | + | * [[http:// |
Catalog columns: | Catalog columns: | ||
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^ Isl_id | -- | Island identification number | | ^ Isl_id | -- | Island identification number | | ||
^ Source_id | -- | Unique source identification number | | ^ Source_id | -- | Unique source identification number | | ||
+ | Some notes are valid only for specific entry types as saved in the S_code column. | ||
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===== Spectral index map ===== | ===== Spectral index map ===== | ||
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===== Acknowledgements ===== | ===== Acknowledgements ===== | ||
- | If you use the resources listed in this page, please reference the paper: de Gasperin, Intema & Frail 2017 | + | If you use resources listed in this page, please reference the paper: de Gasperin, Intema & Frail, MNRAS, 474, 5008 (2017). |
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spidx.txt · Last modified: 2022/07/25 13:46 by fdg