| dc.contributor.author | GALLAGHER, PETER THOMAS | |
| dc.date.accessioned | 2010-01-15T16:36:25Z | |
| dc.date.available | 2010-01-15T16:36:25Z | |
| dc.date.issued | 2004 | |
| dc.date.submitted | 2004 | en |
| dc.identifier.citation | Rudawy, P., Phillips, K. J. H., Gallagher, P. T., Williams, D., Rompolt, B., Keenan, F. P. `Search for 1-10 Hz Modulations in Coronal Emission with SECIS during the August 11, 1999 Eclipse? in Astronomy & Astrophysics, 416, (3), 2004, pp 1179-1186 | en |
| dc.identifier.other | Y | |
| dc.description | PUBLISHED | en |
| dc.description.abstract | Results of the search of the periodic changes of the 530.3 nm line intensity emitted by selected structures of the solar corona in the frequency range 1-10 Hz are presented. A set of 12 728 images of the section of the solar corona extending from near the north pole to the south-west were taken simultaneously in the 530.3 nm ("green") line and white-light with the Solar Eclipse Coronal Imaging System (SECIS) during the 143-seconds-long totality of the 1999 August 11 solar eclipse observed in Shabla, Bulgaria. The time resolution of the collected data is better than 0.05 s and the pixel size is approximately 4 arcsec. Using classical Fourier spectral analysis tools, we investigated temporal changes of the local 530.3 nm coronal line brightness in the frequency range 1-10 Hz of thousands of points within the field of view. The various photometric and instrumental effects have been extensively considered. We did not find any indisputable, statistically significant evidence of periodicities in any of the investigated points (at significance level $\alpha=0.05$). | en |
| dc.description.sponsorship | We thank the Leverhulme Trust (UK) (grant reference
F00203/A), Rutherford Appleton Laboratory (Space Science
and Technology and Instrumentation Depts.) and the Polish State
Committee for Scientific Research (KBN) (grant number is PBZ KBN
054/P03/2001) for financial support. We are grateful to Bulgarian colleagues
who arranged the eclipse site at Shabla so well and were particularly
helpful in getting our equipment transported in time for the
eclipse. We would like to mention specifically Dr Maria Madjarska
(now at Armagh Observatory, UK), and particularly the late Prof.
Dr Vladimir J. Dermendjiev and the late Prof. Dr Dimitar Mishev
(Bulgarian Academy of Sciences, Sofia) for their tireless help before,
during and after the eclipse. We also thank the staff of the Bulgarian
Army Air Defence Establishment for their help in setting up our base
there. We thank Dr Francisco Diego for his help with post-eclipse calibration
of the green-line filter. We also thank the several colleagues
who gave us technical help, especially Dr Serge Koutchmy, Prof. Jay
Pasachoff and Dr Ray Smartt. | en |
| dc.format.extent | 1179-1186 | en |
| dc.format.extent | 473303 bytes | |
| dc.format.mimetype | application/pdf | |
| dc.language.iso | en | en |
| dc.publisher | EDP Sciences | en |
| dc.relation.ispartofseries | Astronomy & Astrophysics | en |
| dc.relation.ispartofseries | 416 | en |
| dc.relation.ispartofseries | 3 | en |
| dc.rights | Y | en |
| dc.subject | Astrophysics | en |
| dc.title | Search for 1-10 Hz Modulations in Coronal Emission with SECIS during the August 11, 1999 Eclipse | en |
| dc.type | Journal Article | en |
| dc.type.supercollection | scholarly_publications | en |
| dc.type.supercollection | refereed_publications | en |
| dc.identifier.peoplefinderurl | http://people.tcd.ie/gallagpt | |
| dc.identifier.rssinternalid | 37719 | |
| dc.identifier.rssuri | http://dx.doi.org/10.1051/0004-6361:20031737 | |
| dc.identifier.uri | http://hdl.handle.net/2262/35687 | |
