Estimating the bispectrum of the Very Small Array data
We estimate the bispectrum of the Very Small Array data from the compact and extended configuration observations released in 2002 December, and compare our results with those obtained from Gaussian simulations. There is a slight excess of large bispectrum values for two individual fields, but this d...
| المؤلفون الرئيسيون: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| التنسيق: | Journal article |
| اللغة: | English |
| منشور في: |
2004
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| _version_ | 1826268442508918784 |
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| author | Smith, S Rocha, G Challinor, A Battye, R Carreira, P Cleary, K Davies, R Davis, R Dickinson, C Genova-Santos, R Grainge, K Gutiérrez, C Hafez, Y Hobson, M Jones, M Kneissl, R Lancaster, K Lasenby, A Leahy, J Maisinger, K Pooley, G Rajguru, N Rebolo, R Rubiño-Martin, J Molina, P |
| author_facet | Smith, S Rocha, G Challinor, A Battye, R Carreira, P Cleary, K Davies, R Davis, R Dickinson, C Genova-Santos, R Grainge, K Gutiérrez, C Hafez, Y Hobson, M Jones, M Kneissl, R Lancaster, K Lasenby, A Leahy, J Maisinger, K Pooley, G Rajguru, N Rebolo, R Rubiño-Martin, J Molina, P |
| author_sort | Smith, S |
| collection | OXFORD |
| description | We estimate the bispectrum of the Very Small Array data from the compact and extended configuration observations released in 2002 December, and compare our results with those obtained from Gaussian simulations. There is a slight excess of large bispectrum values for two individual fields, but this does not appear when the fields are combined. Given our expected level of residual point sources, we do not expect these to be the source of the discrepancy. Using the compact configuration data, we put an upper limit of 5400 on the value of F NL, the non-linear coupling parameter, at 95 per cent confidence. We test our bispectrum estimator using non-Gaussian simulations with a known bispectrum, and recover the input values. |
| first_indexed | 2024-03-06T21:09:43Z |
| format | Journal article |
| id | oxford-uuid:3dba422b-cfb2-4fcf-90c0-34ae615e4f7d |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T21:09:43Z |
| publishDate | 2004 |
| record_format | dspace |
| spelling | oxford-uuid:3dba422b-cfb2-4fcf-90c0-34ae615e4f7d2022-03-26T14:21:14ZEstimating the bispectrum of the Very Small Array dataJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:3dba422b-cfb2-4fcf-90c0-34ae615e4f7dEnglishSymplectic Elements at Oxford2004Smith, SRocha, GChallinor, ABattye, RCarreira, PCleary, KDavies, RDavis, RDickinson, CGenova-Santos, RGrainge, KGutiérrez, CHafez, YHobson, MJones, MKneissl, RLancaster, KLasenby, ALeahy, JMaisinger, KPooley, GRajguru, NRebolo, RRubiño-Martin, JMolina, PWe estimate the bispectrum of the Very Small Array data from the compact and extended configuration observations released in 2002 December, and compare our results with those obtained from Gaussian simulations. There is a slight excess of large bispectrum values for two individual fields, but this does not appear when the fields are combined. Given our expected level of residual point sources, we do not expect these to be the source of the discrepancy. Using the compact configuration data, we put an upper limit of 5400 on the value of F NL, the non-linear coupling parameter, at 95 per cent confidence. We test our bispectrum estimator using non-Gaussian simulations with a known bispectrum, and recover the input values. |
| spellingShingle | Smith, S Rocha, G Challinor, A Battye, R Carreira, P Cleary, K Davies, R Davis, R Dickinson, C Genova-Santos, R Grainge, K Gutiérrez, C Hafez, Y Hobson, M Jones, M Kneissl, R Lancaster, K Lasenby, A Leahy, J Maisinger, K Pooley, G Rajguru, N Rebolo, R Rubiño-Martin, J Molina, P Estimating the bispectrum of the Very Small Array data |
| title | Estimating the bispectrum of the Very Small Array data |
| title_full | Estimating the bispectrum of the Very Small Array data |
| title_fullStr | Estimating the bispectrum of the Very Small Array data |
| title_full_unstemmed | Estimating the bispectrum of the Very Small Array data |
| title_short | Estimating the bispectrum of the Very Small Array data |
| title_sort | estimating the bispectrum of the very small array data |
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